java for intermediate users

Java for Intermediate UsersPrepare for advanced Java

Build on programming basics, by using

the world’s most popular language to:

• Maintain your advantage

• Refine your skills

• Write functional code

2Marius Claassen,

Java Intermediate

About me

Marius Claassen, Java Developer and Teacher

I am a self-taught Java developer. Having been a teacher for many

years, I am now working full-time as an independent Java instructor,

making video tutorials. It is my mission to help others learn

programming in general and Java in particular.

3Marius Claassen,

Java Intermediate

Benefits

• Read Java code

• Develop useful Java applications

• Devise Java solutions when given a

problem statement

4Marius Claassen,

Java Intermediate

Major components

1. Introduction

2. Java data types

3. Library classes

4. Java classes

5. Lambdas and Streams

6. JavaFX

7. Conclusion

5Marius Claassen,

Java Intermediate

Lecture outline

• 51 Lectures

• 5 minutes

1. Coding exercise

2. Lecture description

3. PDF

4. Video

6Marius Claassen,

Java Intermediate

Ideal student

* Completed Java beginner course

* You want to improve your skills by:• watching live coding

• doing coding exercises

• checking answers against solutions

7Marius Claassen,

Java Intermediate

Enrolment

30-day money back guarantee

8Marius Claassen,

Java Intermediate

To get details about this course:

• [email protected]

or

• https://www.udemy.com/course/1133518/manage/basics/

9Marius Claassen,

Java Intermediate

mailto:[email protected]

https://www.udemy.com/course/1133518/manage/basics/

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

10Marius Claassen,

Java Intermediate

Lecture 2: Development tools

• JDK (SE 8 or SE 9)http://www.oracle.com/technetwork/java/javase/downloads/index.html

• IDE (IntelliJ IDEA)https://www.jetbrains.com/idea/

• Internet browser (Google Chrome)

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Java Intermediate

22Marius Claassen,

Java Intermediate

24Marius Claassen,

Java Intermediate

27 Marius Claassen, 2017

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

49Marius Claassen,

Java Intermediate

Lecture 3: Numeric types example

Numeric types problem statement:

Print the numeric data types int and float with

their names and values

50Marius Claassen,

Java Intermediate

Lecture 3: Numeric types example

public class Lecture3 {

public static void main(String[] args) {

int intNumber = 308_000;

float floatNumber = 9_000f;

System.out.print(“intNumber: ” + intNumber);

System.out.print(“\tfloatNumber: ” + floatNumber);

}

} // intNumber: 308000 floatNumber: 9000.051

Marius Claassen,

Java Intermediate

Lecture 3: Numeric types exercise

Print the numeric data type long initialized as

6 000 000

52Marius Claassen,

Java Intermediate

Lecture 3: Numeric types exercise



long longNumber = 6_000_000;

// TODO: Print the name and value of ‘longNumber’

}

}

53Marius Claassen,

Java Intermediate

Lecture 4: Numeric types solution



long longNumber = 6_000_000;

System.out.print(“longNumber: ” + longNumber);

}

} // longNumber: 6000000

54Marius Claassen,

Java Intermediate

Lecture 5: Textual type example

Textual types problem statement:

Implement the textual data type ‘String’ and

print its name and value

55Marius Claassen,

Java Intermediate

Lecture 5: Textual type example



String string = “Java is everywhere.”;

System.out.print(“Text: ” + string);

}

} // Text: Java is everywhere.

56Marius Claassen,

Java Intermediate

Lecture 5: Textual type exercise

Print the textual data type ‘String’ initialized

as ‘Java continues to dominate.’

57Marius Claassen,

Java Intermediate

Lecture 5: Textual type exercise



String myString = “Java continues to dominate.”;

// TODO: Print the name and value of ‘myString’

}

}

58Marius Claassen,

Java Intermediate

Lecture 6: Textual type solution



String myString = “Java continues to dominate.”;

System.out.print(“myString: ” + myString);

}

} // myString: Java continues to dominate.

59Marius Claassen,

Java Intermediate

Lecture 7: Convert types example

Converting types problem statement:

Convert a String to a float and a double to a

String

60Marius Claassen,

Java Intermediate

Lecture 7: Convert types example



String stringText = “7.7”;

float floatNumber = Float.parseFloat(stringText);

System.out.print(“String to float: ” + floatNumber);

double doubleNumber = 200;

String text1 = Double.toString(doubleNumber);

System.out.print(“\ndouble to String: ” + text1); } }

// String to float: 7.7

// double to String: 200.061

Marius Claassen,

Java Intermediate

Lecture 7: Convert types exercise

Convert an int to a String named ‘text’

62Marius Claassen,

Java Intermediate

Lecture 7: Convert types exercise



int value = 1_000;

// TODO: Convert int ‘value’ to a String ‘text’

System.out.print(“int to String: ” + text);

}

} 63

Marius Claassen,

Java Intermediate

Lecture 8: Convert types solution



int value = 1_000;

String text = Integer.toString(value);

System.out.print(“int to String: ” + text);

}

} // int to String: 100064

Marius Claassen,

Java Intermediate

Lecture 9: Keyboard input example

Keyboard input problem statement:

Implement keyboard input to print the name

of the world’s largest economy

65Marius Claassen,

Java Intermediate

Lecture 9: Keyboard input example



System.out.print(“Name the world’s largest economy ”);

Scanner scanner = new Scanner(System.in);

String largestEconomy = scanner.next;

System.out.print(largestEconomy+“ has the largest economy.”);}}

// Name the world’s largest economy ***?

// USA has the largest economy.

66Marius Claassen,

Java Intermediate

Lecture 9: Keyboard input exercise

Create a Scanner object named ‘scanner1’

67Marius Claassen,

Java Intermediate

Lecture 9: Keyboard input exercise



System.out.print(“Name the world’s most populous country ”);

// TODO: Create a Scanner object named ‘scanner1’

String largestPopulation = scanner1.next;

System.out.print(largestPopulation+“ has the largest population”); } }

68Marius Claassen,

Java Intermediate

Lecture 10: Keyboard input solution



System.out.print(“Name the world’s most populous country ”);

Scanner scanner1 = new Scanner(System.in);

String largestPopulation = scanner1.next;

System.out.print(largestPopulation+“ has the largest population”); } }

// Name the world’s most populous country ***?

// China has the largest population

69Marius Claassen,

Java Intermediate

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

Marius Claassen,

Java Intermediate

Lecture 11: Import example

Import problem statement:

Implement import statements for the

‘LocalDate’ and ‘Month’ classes

71Marius Claassen,

Java Intermediate

Lecture 11: Import example

import java.time.LocalDate;

import java.time.Month;



LocalDate jdk1Release = LocalDate.of(1996, Month.JANUARY, 21);

System.out.print(“JDK 1.0 release date: ” + jdk1Release); } }

// JDK 1.0 release date: 1996-01-21

72Marius Claassen,

Java Intermediate

Lecture 11: Import exercise

Implement an import statement for the

‘LocalDate’ class

73Marius Claassen,

Java Intermediate

Lecture 11: Import exercise

// TODO: Import the ‘LocalDate’ class




LocalDate jdk9ReleaseDate

= LocalDate.of(2017, Month. SEPTEMBER, 21);

System.out.print(“JDK SE 9 release date: ” + jdk9ReleaseDate); } }

74Marius Claassen,

Java Intermediate

Lecture 12: Import solution

import java.time.LocalDate;




LocalDate jdk9ReleaseDate

= LocalDate.of(2017, Month. SEPTEMBER, 21);

System.out.print(“JDK SE 9 release date: ” + jdk9ReleaseDate); } }

75Marius Claassen,

Java Intermediate

Lecture 13: Package example

Package statement problem statement:

Implement the package statement ‘courses’

76Marius Claassen,

Java Intermediate

Lecture 13: Package example

package courses;



BeginnerJava beginnerJava = new BeginnerJava();

beginnerJava.printBeginnerJava();

IntermediateJava intermediateJava = new IntermediateJava();

intermediateJava.printIntermediateJava(); } }

// Java Beginner course published

// Java Intermediate course completed77

Marius Claassen,

Java Intermediate

package courses;

public class BeginnerJava {

public void printBeginnerJava() {

System.out.print(“Java Beginner course published”);

}

}

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Java Intermediate

package courses;

public class IntermediateJava {

public void printIntermediateJava() {

System.out.print(“\nJava Intermediate course completed”);

}

}

79Marius Claassen,

Java Intermediate

Lecture 13: Package exercise

Implement the package statement

‘intermediatejava’

80Marius Claassen,

Java Intermediate

Lecture 13: Package exercise

// TODO: Implement the package statement ‘intermediatejava’



Introduction introduction = new Introduction();

introduction.printIntroduction();

Contents contents = new Contents();

contents.printContents(); } }

81Marius Claassen,

Java Intermediate


public class Introduction {

public void printIntroduction() {

System.out.print(“Introduction completed, ”);

}

}

82Marius Claassen,

Java Intermediate


public class Contents {

public void printContents() {

System.out.print(“Contents started”);

}

}

83Marius Claassen,

Java Intermediate

Lecture 14: Package solution

package intermediatejava;



Introduction introduction = new Introduction();

introduction.printIntroduction();

Contents contents = new Contents();

contents.printContents(); } }

// Introduction completed, Contents started

84Marius Claassen,

Java Intermediate


public class Introduction {

public void printIntroduction() {

System.out.print(“Introduction completed, ”);

}

}

85Marius Claassen,

Java Intermediate


public class Contents {

public void printContents() {

System.out.print(“Contents started”);

}

}

86Marius Claassen,

Java Intermediate

Lecture 15: String class example

String class problem statement:

Declare a String named ‘businessName’

87Marius Claassen,

Java Intermediate

Lecture 15: String class example



String businessName = “AlefTav Coding”;

System.out.print(“My business is named ” + businessName);

}

}

// My business is named AlefTav Coding

88Marius Claassen,

Java Intermediate

Lecture 15: String class exercise

Declare a String, ‘courseTitle’ initialized as

‘Java for Intermediate Users’

89Marius Claassen,

Java Intermediate

Lecture 15: String class exercise



// TODO: Declare a String, ‘courseTitle’ initialized as ‘Java for

// Intermediate Users’

System.out.print(“The title of this course: ” + courseTitle);

}

}

90Marius Claassen,

Java Intermediate

Lecture 16: String class solution



String courseTitle = “Java for Intermediate Users”;

System.out.print(“The title of this course is ” + courseTitle);

}

}

// The title of this course is Java for Intermediate Users

91Marius Claassen,

Java Intermediate

Lecture 17: Random class example

Random class problem statement:

Generate 4 random integers between 1 and

600, with a seed value of 3

92Marius Claassen,

Java Intermediate

Lecture 17: Random class example



Random random = new Random(3);

System.out.print(“Four random integers between 1 and 600: ”);

for (int i = 0; i < 4; i++) { System.out.print(random.nextInt(600) + “ ”); }

}

}

// Four random integers between 1 and 600: 134 260 210 181

93Marius Claassen,

Java Intermediate

Lecture 17: Random class exercise

Implement an object named ‘random’ with

seed value 9

94Marius Claassen,

Java Intermediate




// TODO: Implement an object named, ‘random’ with seed value 9

System.out.print(“Five random integers between 1 and 200: ”);


}

}

95Marius Claassen,

Java Intermediate


Implement an object named ‘random’ with

seed value 9

96Marius Claassen,

Java Intermediate




// TODO: Implement an object named, ‘random’ with seed value 9



}

}

97Marius Claassen,

Java Intermediate

Lecture 18: Random class solution



Random random = new Random(9);



}

}

// Five random integers between 1 and 200: 189 196 148 135 159

98Marius Claassen,

Java Intermediate

Lecture 19: Math class example

Math class problem statement:

Print the answer to ‘baseValue’ 15.6, raised

to ‘powerValue’ 4.7

99Marius Claassen,

Java Intermediate

Lecture 19: Math class example



double baseValue = 15.6;

double powerValue = 4.7;

System.out.printf(“15.6⁴˙⁷: %.3f” + Math.pow(baseValue, powerValue));

}

}

// 405215.092

100Marius Claassen,

Java Intermediate

Lecture 19: Math class exercise

Print to four decimal places the square root

of 1511

101Marius Claassen,

Java Intermediate

Lecture 19: Math class exercise



double x = 1511;

// TODO: Print to 4 decimal places the square root of 1511

}

}

102Marius Claassen,

Java Intermediate

Lecture 20: Math class solution



double x = 1511;

System.out.printf(“%.4f”, Math.sqrt(x));

}

}

// 38.8716

103Marius Claassen,

Java Intermediate

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

104Marius Claassen,

Java Intermediate

Lecture 21: Java class example

Java class problem statement:

Implement a class named ‘Dog’

105Marius Claassen,

Java Intermediate

Lecture 21: Java class example



Dog dog1 = new Dog();

dog1.getName();

}

}

// The dog’s name is ‘Faithful’.

106Marius Claassen,

Java Intermediate

public class Dog {

public void getName() {

System.out.print(“The dog’s name is ‘Faithful’.” );

}

}

107Marius Claassen,

Java Intermediate

Lecture 21: Java class exercise

Implement a class named ‘Person’

108Marius Claassen,

Java Intermediate

Lecture 21: Java class exercise



Person person1 = new Person();

person1.saySomething();

}

}

109Marius Claassen,

Java Intermediate

// TODO: Implement a class named ‘Person’

{

public void saySomething() {

System.out.print(“I am a person.” );

}

}

110Marius Claassen,

Java Intermediate

Lecture 22: Java class solution



Person person1 = new Person();

person1.saySomething();

}

}

// I am a person.

111Marius Claassen,

Java Intermediate

public class Person

{

public void saySomething() {

System.out.print(“I am a person.” );

}

}

112Marius Claassen,

Java Intermediate

Lecture 23: Java Object example

Instantiate an object problem statement:

Instantiate an object named ‘mobilePhone’

113Marius Claassen,

Java Intermediate

Lecture 23: Java Object example



MobilePhone mobilePhone = new MobilePhone();

mobilePhone.getName();

}

}

// Samsung or iPhone

114Marius Claassen,

Java Intermediate

public class MobilePhone {

public void getName() {

System.out.print(“Samsung or iPhone” );

}

}

115Marius Claassen,

Java Intermediate

Lecture 23: Java Object exercise

Instantiate an object named ‘person’

116Marius Claassen,

Java Intermediate

Lecture 23: Java Object exercise



// TODO: Instantiate an object named ‘person’

person.speak();

}

}

117Marius Claassen,

Java Intermediate

public class Person {

public void speak() {

System.out.print(“What a wonderful world!” );

}

}

118Marius Claassen,

Java Intermediate

Lecture 24: Java Object solution



Person person = new Person();

person.speak();

}

}

// What a wonderful world!

119Marius Claassen,

Java Intermediate


public void speak() {

System.out.print(“What a wonderful world!” );

}

}

120Marius Claassen,

Java Intermediate

Lecture 25: Constructor example

Constructor problem statement:

Implement the constructor of the class

‘MobilePhone’

121Marius Claassen,

Java Intermediate

Lecture 25: Constructor example



MobilePhone mobilePhone = new MobilePhone(“Samsung”, 100);

}

}

// NAME: Samsung

// PRICE: $100.00

122Marius Claassen,

Java Intermediate


String name;

double price;

public MobilePhone(String newName, double newPrice) { // constructor

name = newName;

price = newPrice;

System.out.printf(“NAME: %s\nPRICE: $%.2f”, name, price);

}

}123

Marius Claassen,

Java Intermediate

Lecture 25: Constructor exercise

Implement the constructor of the ‘Person’

class

124Marius Claassen,

Java Intermediate

Lecture 25: Constructor exercise



Person person = new Person(“Sarah”, 50);

}

}

125Marius Claassen,

Java Intermediate


String name;

int age;

// TODO: Implement the constructor of the ‘Person’ class

{

name = newName;

age = newAge;

System.out.print(“NAME: ” + name + “, ” + “AGE: ” + age); } }

126Marius Claassen,

Java Intermediate

Lecture 26: Constructor solution



Person person = new Person(“Sarah”, 50);

}

}

// NAME: Sarah , AGE: 50

127Marius Claassen,

Java Intermediate


String name;

int age;

public Person(String newName, int newAge)

{

name = newName;

age = newAge;

System.out.print(“NAME: ” + name + “, ” + “AGE: ” + age); } }

128Marius Claassen,

Java Intermediate

Lecture 27: Encapsulation example

Encapsulation problem statement:

Declare a private field ‘price’ and implement

a public method ‘setPrice’ with one

parameter ‘newPrice’

129Marius Claassen,

Java Intermediate

Lecture 27: Encapsulation example



MobilePhone mobilePhone = new MobilePhone(300);

}

}

// Mobile phone price: $300.00

130Marius Claassen,

Java Intermediate


private double price;

public void setPrice(double newPrice) {

price = newPrice;

System.out.printf(“Mobile phone price: $%.2f”, price);

}

}

131Marius Claassen,

Java Intermediate

Lecture 27: Encapsulation exercise

Declare a private field ‘name’ and implement

a public method ‘setName’ with one

parameter ‘newName’

132Marius Claassen,

Java Intermediate

Lecture 27: Encapsulation exercise




person.setName(“David”);

}

}

133Marius Claassen,

Java Intermediate


// TODO: Declare a private field ‘name’

// TODO: Implement a public method ‘setName’ with one parameter

// ‘newName’

{

name = newName;

System.out.printf(“NAME: %s”, name); } }

134Marius Claassen,

Java Intermediate

Lecture 28: Encapsulation solution




person.setName(“David”);

}

}

// NAME: David

135Marius Claassen,

Java Intermediate


private String name;

public void setName(String newName)

{

name = newName;

System.out.printf(“NAME: %s”, name); } }

136Marius Claassen,

Java Intermediate

Lecture 29: ArrayList example

ArrayList problem statement:

Implement an ArrayList of type String, named

‘planets’

137Marius Claassen,

Java Intermediate

Lecture 29: ArrayList example



ArrayList<String> planets = new ArrayList<>();

planets.add(“Mercury”);

planets.add(“Venus”);

planets.add(“Earth”);

planets.add(“Mars”);

for (String planet : planets) { System.out.print(planet + “ ”); } } }

// Mercury Venus Earth Mars138

Marius Claassen,

Java Intermediate

Lecture 29: ArrayList exercise

Implement an ArrayList of type String, named

‘currencies’

139Marius Claassen,

Java Intermediate

Lecture 29: ArrayList exercise



// TODO: Implement an ArrayList of type String , named ‘currencies’

currencies.add(“US Dollar”);

currencies.add(“Indian Rupee”);

currencies.add(“Thai Baht”);

for (String currency : currencies) { System.out.print(currency + “ ”); } } }

140Marius Claassen,

Java Intermediate

Lecture 30: ArrayList solution



ArrayList<String> currencies = new ArrayList<>();

currencies.add(“US Dollar”);

currencies.add(“Indian Rupee”);

currencies.add(“Thai Baht”);

for (String currency : currencies) { System.out.print(currency + “ ”); } } }

// US Dollar Indian Rupee Thai Baht

141Marius Claassen,

Java Intermediate

Lecture 31: Debugging example

Debugging problem statement:

Implement debugging to handle the

exception, StackOverflowError

142Marius Claassen,

Java Intermediate

Lecture 31: Debugging example



int y = 8;

System.out.print(“Fibonacci value at index ” + y + “: ” + getFibonacci(y));

}

143Marius Claassen,

Java Intermediate

private static long getFibonacci(int x) {

return x <= 2 ? 1 : getFibonacci(x - 1) + getFibonacci(x - 2) ;

}

}

// Fibonacci value at index 8: 21

144Marius Claassen,

Java Intermediate

Lecture 31: Debugging exercise

Implement debugging to handle the

exception, StackOverflowError

145Marius Claassen,

Java Intermediate

Lecture 31: Debugging exercise



int y = 10;


}

146Marius Claassen,

Java Intermediate


// TODO: Implement debugging to handle the exception,

// StackOverflowError

return getFibonacci(x - 1) + getFibonacci(x - 2);

}

}

147Marius Claassen,

Java Intermediate

Lecture 32: Debugging solution



int y = 10;


}

148Marius Claassen,

Java Intermediate


return x <= 2 ? 1 : getFibonacci(x - 1) + getFibonacci(x - 2) ;

}

}

// Fibonacci value at index 10: 55

149Marius Claassen,

Java Intermediate

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

150Marius Claassen,

Java Intermediate

Lecture 33: Lambda Part 1 example

Lambda part 1 problem statement:

Implement a lambda expression to print

‘Hello, lambda’

151Marius Claassen,

Java Intermediate




Thread thread1 = new Thread( () -> System.out.print(“Hello, lambda”); )

thread1.run();

}

}

// Hello, lambda

152Marius Claassen,

Java Intermediate

Lecture 33: Lambda Part 1 exercise

Implement a lambda object named ‘thread’ to

print ‘My first lambda’

153Marius Claassen,

Java Intermediate




// TODO: Implement a lambda object named ‘thread’ to print,

// ‘My first lambda’

thread.run();

}

}

154Marius Claassen,

Java Intermediate

Lecture 34: Lambda Part 1 solution



Thread thread = new Thread( () -> System.out.print(“My first lambda”); )

thread.run();

}

}

// My first lambda

155Marius Claassen,

Java Intermediate


Lambda Part 2 problem statement:

Implement a lambda to remove even numbers

from a list

156Marius Claassen,

Java Intermediate


import java.util.ArrayList; import java.util.Arrays;



ArrayList<Integer> values = new ArrayList<>(Arrays.asList(

1, 2, 3, 4, 5, 6, 7) );

values.removeIf(i -> i % 2 == 0);

values.forEach(i -> System.out.print(i + “ ”) ); } }

// 1 3 5 7

157Marius Claassen,

Java Intermediate


Implement a lambda to remove odd numbers

from a list

158Marius Claassen,

Java Intermediate





ArrayList<Integer> numbers = new ArrayList<>(Arrays.asList(

5, 6, 7, 8, 9, 10) );

// TODO: Implement a lambda to remove odd numbers from a list

numbers.forEach(i -> System.out.print(i + “ ”) ); } }

159Marius Claassen,

Java Intermediate

Lecture 36: Lambda Part 2 solution





5, 6, 7, 8, 9, 10) );

numbers.removeIf(i -> i % 2 != 0);

numbers.forEach(i -> System.out.print(i + “ ”) ); } }

// 6 8 10

160Marius Claassen,

Java Intermediate

Lecture 37: Streams Part 1 example

Streams Part 1 problem statement:

Implement the stream() to print words in

alphabetical order

161Marius Claassen,

Java Intermediate


import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator;



ArrayList<String> cities = new ArrayList<>(Arrays.asList(“Mumbai”,

“Karachi”, “Los Angeles”, “Nonthaburi City”, “Kolkata”, “New York”) );

cities.stream().sorted(Comparator.naturalOrder())

.forEach(s -> System.out.print(s + “ ”) ); } }

// Karachi Kolkata Los Angeles Mumbai New York Nonthaburi City

162Marius Claassen,

Java Intermediate

Lecture 37: Streams Part1 exercise

Implement the stream() to print words in

reverse order

163Marius Claassen,

Java Intermediate





ArrayList<String> capitalCities = new ArrayList<>(Arrays.asList(

“Delhi”, “Islamabad”, “Bangkok”, “Washington”, “Jakarta”) );

// TODO: Implement the stream()

// TODO: to print words

// TODO: in reverse order

} } 164

Marius Claassen,

Java Intermediate

Lecture 38: Streams Part 1 solution




ArrayList<String> capitalCities = new ArrayList<>(Arrays.asList(

“Delhi”, “Islamabad”, “Bangkok”, “Washington”, “Jakarta”) );

capitalCities.stream().sorted(Comparator.reverseOrder())

.forEach(s -> System.out.print(s + “ ”) ); } }

// Washington Jakarta Islamabad Delhi Bangkok

165Marius Claassen,

Java Intermediate


Streams Part 2 problem statement:

Implement the stream() to print an int using

the filter, map, reduce pattern

166Marius Claassen,

Java Intermediate






6, 7, 8, 9) );

int sum = numbers.stream().filter(i -> i < 8).map(e -> e * 3)

.reduce(0, (partAnswer, y) -> partAnswer + y);

System.out.print(sum); } }

// 39167

Marius Claassen,

Java Intermediate


Implement the stream() to print an int using

the filter, map, reduce pattern

168Marius Claassen,

Java Intermediate






1, 2, 3, 4, 5) );

// TODO: Square each value larger than 3 and get their sum

// TODO:

// TODO:

System.out.print(sum); } } 169

Marius Claassen,

Java Intermediate

Lecture 40: Streams Part 2 solution





1, 2, 3, 4, 5) );

int sum = values.stream().filter(i -> i > 3).map(e -> e * e)

.reduce(0, (partAnswer, y) -> partAnswer + y);

System.out.print(sum); } }

// 41170

Marius Claassen,

Java Intermediate

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

Marius Claassen,

Java Intermediate

Lecture 41: JavaFX Colors example

JavaFX colors problem statement:

Implement the ColorPicker class to display

colours and their web # values

172Marius Claassen,

Java Intermediate

Lecture 41: JavaFX Colors example

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.ColorPicker;

import javafx.scene.layout.HBox;

import javafx.stage.Stage;

173Marius Claassen,

Java Intermediate

public class Lecture41 extends Application {

@Override public void start(Stage stage) {

ColorPicker colorPicker1 = new ColorPicker();

colorPicker1.setOnAction(event -> colorPicker1.getValue() );

HBox hBox = new HBox(colorPicker1);

hBox.setStyle(“-fx-background-color: #d3d3d3”);

stage.setTitle(“JavaFX Colors Example”);

stage.setScene(new Scene(hBox, 400, 400) );

stage.show(); } } 174

Marius Claassen,

Java Intermediate

175

ColorPicker

Marius Claassen,

Java Intermediate

Lecture 41: JavaFX Colors exercise

Implement an object named ‘colorPicker’ to

display colours and their web # values

176Marius Claassen,

Java Intermediate

Lecture 41: JavaFX Colors exercise






177Marius Claassen,

Java Intermediate



// TODO: Implement an object named ‘colorPicker’

// TODO: to display colours and their # web values

HBox hBox = new HBox(colorPicker);


stage.setTitle(“JavaFX Colors Solution”);



Marius Claassen,

Java Intermediate

Lecture 42: JavaFX Colors solution






179Marius Claassen,

Java Intermediate



ColorPicker colorPicker = new ColorPicker();

colorPicker.setOnAction(event -> colorPicker.getValue() );

HBox hBox = new HBox(colorPicker);


stage.setTitle(“JavaFX Colors Solution”);



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Java Intermediate

181

ColorPicker

Marius Claassen,

Java Intermediate

Lecture 43: JavaFX shape example

JavaFX shapes problem statement:

Create a gray rectangle with dimensions 0, 0,

230, 150

182Marius Claassen,

Java Intermediate

Lecture 43: JavaFX shape example



import javafx.scene.layout.VBox;

import javafx.scene.paint.Color;


import javafx.scene.shape.Rectangle;

183Marius Claassen,

Java Intermediate



Rectangle rectangle1 = new Rectangle(0, 0, 230, 150);

rectangle1.setFill(Color.GRAY);

VBox vBox = new VBox();

vBox.getChildren().add(rectangle1);

stage.setTitle(“JavaFX Shapes Example”);

stage.setScene(new Scene(vBox, 400, 400) );


Marius Claassen,

Java Intermediate

185

Rectangle

Marius Claassen,

Java Intermediate

Lecture 43: JavaFX shape exercise

Create a gray rectangle named ‘rectangle’

with dimensions 0, 0, 390, 100

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Java Intermediate

Lecture 43: JavaFX shape exercise







187Marius Claassen,

Java Intermediate



// TODO: Create a gray rectangle named ‘rectangle’

// TODO: with dimensions 0, 0, 390, 100


vBox.getChildren().add(rectangle);

stage.setTitle(“JavaFX Shapes Solution”);



Marius Claassen,

Java Intermediate

Lecture 44: JavaFX shapes solution







189Marius Claassen,

Java Intermediate



Rectangle rectangle = new Rectangle(0, 0, 390, 100);

rectangle.setFill(Color.GRAY);


vBox.getChildren().add(rectangle);

stage.setTitle(“JavaFX Shapes Solution”);



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Java Intermediate

191

Rectangle

Marius Claassen,

Java Intermediate

Lecture 45: JavaFX 3D graphics

JavaFX graphics problem statement:

Create an object named ‘sphere’ with radius

of 200. Wrap the ‘phongMaterial’ object onto

the sphere and add the sphere to the ‘vBox’

object

https://en.wikipedia.org/wiki/Behrmann_projection#/media/File:Behrmann_projection_SW.jpg

192Marius Claassen,

Java Intermediate

Lecture 45: JavaFX 3D graphics



import javafx.scene.image.Image;



import javafx.scene.paint.PhongMaterial;

import javafx.scene.shape.Sphere;


193Marius Claassen,

Java Intermediate




Image image = new Image(Lecture45.class.getResource(

“worldmap1.jpg”).toExternalForm() );

PhongMaterial phongMaterial = new PhongMaterial();

phongMaterial.setDiffuseColor(Color.WHITE);

phongMaterial.setDiffuseMap(image);

194Marius Claassen,

Java Intermediate

Sphere sphere = new Sphere(200);

sphere.setMaterial(phongMaterial);

vBox.getChildren().add(sphere);

stage.setTitle(“JavaFX Graphics Example”);


stage.show(); } }

195Marius Claassen,

Java Intermediate

196

3D Graphic

Marius Claassen,

Java Intermediate

Lecture 45: JavaFX graphics exercise

Create an object named ‘sphere’ with radius

of 200. Wrap the ‘phongMaterial’ object onto

the sphere and add the sphere to the ‘vBox’

object

https://en.wikipedia.org/wiki/List_of_map_projections#/media/File:Equirectangular_projection_SW.jpg

197Marius Claassen,

Java Intermediate

Lecture 45: JavaFX graphics

exercise









198Marius Claassen,

Java Intermediate









199Marius Claassen,

Java Intermediate

// TODO: Create an object named ‘sphere’ with radius of 200.

// TODO: Wrap the ‘phongMaterial’ object onto the sphere

// TODO: and add the sphere to the vBox

stage.setTitle(“JavaFX Graphics Example”);


stage.show(); } }

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Java Intermediate

Lecture 46: JavaFX graphics

solution









201Marius Claassen,

Java Intermediate









202Marius Claassen,

Java Intermediate

Sphere sphere = new Sphere(200);

sphere.setMaterial(phongMaterial);

vBox.getChildren().add(sphere);

stage.setTitle(“JavaFX Graphics Solution”);


stage.show(); } }

203Marius Claassen,

Java Intermediate

204

3D Graphic

Marius Claassen,

Java Intermediate

Lecture 47: JavaFX video example

JavaFX video problem statement:

Create a video player by implementing the 3

objects ‘media1’, ‘mediaPlayer1’ and

‘mediaView1’.

https://www.youtube.com/watch?v=zg79C7XM1Xs

205Marius Claassen,

Java Intermediate

Lecture 47: JavaFX video example



import javafx.scene.layout.StackPane;

import javafx.scene.media.Media;

import javafx.scene.media.MediaPlayer;

import javafx.scene.media.MediaView;


import java.io.File;

206Marius Claassen,

Java Intermediate


final String PATH = “C:/videos/Java is what Java does video.mp4”;


File file = new File(PATH);

Media media1 = new Media(file.toURI().toString() );

MediaPlayer mediaPlayer1 = new MediaPlayer(media1);

mediaPlayer1.setAutoPlay(true);

MediaView mediaView1 = new MediaView(mediaPlayer1);

207Marius Claassen,

Java Intermediate

mediaView.setFitWidth(800);

mediaView.setFitHeight(500);

StackPane stackPane = new StackPane(mediaView1);

stage.setTitle(“JavaFX Video Example”);

stage.setScene(new Scene(stackPane) );


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Java Intermediate

209

Video

Marius Claassen,

Java Intermediate

Lecture 47: JavaFX video exercise

Create a video player by implementing the 3

objects ‘media’, ‘mediaPlayer’ and

‘mediaView’

https://www.youtube.com/watch?v=b-Cr0EWwaTk

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Java Intermediate

Lecture 47: JavaFX video exercise









211Marius Claassen,

Java Intermediate


final String PATH = “C:/videos/Java life video.mp4”;



// TODO: Create a media player by implementing the 3 objects ‘media’

// TODO: ‘mediaPlayer’

mediaPlayer.setAutoPlay(true);

// TODO: and ‘mediaView’

212Marius Claassen,

Java Intermediate



StackPane stackPane = new StackPane(mediaView);

stage.setTitle(“JavaFX Video Solution”);



Marius Claassen,

Java Intermediate

Lecture 48: JavaFX video solution









214Marius Claassen,

Java Intermediate


final String PATH = “C:/videos/Java life video.mp4”;



Media media = new Media(file.toURI().toString() );

MediaPlayer mediaPlayer = new MediaPlayer(media);

mediaPlayer.setAutoPlay(true);

MediaView mediaView = new MediaView(mediaPlayer);

215Marius Claassen,

Java Intermediate



StackPane stackPane = new StackPane(mediaView);

stage.setTitle(“JavaFX Video Solution”);



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Java Intermediate

217

Video

Marius Claassen,

Java Intermediate

Lecture 49: KeyPressed example

JavaFX KeyPressed problem statement:

Implement the setOnKeyPressed() method to

print whether or not the letter ‘B’ is pressed

218Marius Claassen,

Java Intermediate

Lecture 49: KeyPressed example


import javafx.geometry.Pos;


import javafx.scene.input.KeyCode;



import javafx.scene.text.Text;


219Marius Claassen,

Java Intermediate



HBox hBox = new HBox();

Text text = new Text();

hBox.getChilden().add(text);

hBox.setAlignment(Pos.CENTER);

Scene scene = new Scene(hBox, 400, 400);

scene.setFill(Color.LIME);

220Marius Claassen,

Java Intermediate

scene.setOnKeyPressed(event -> text.setText(

event.getCode() == KeyCode.B ? “Letter B” : ”Not letter B”) );

stage.setTitle(“JavaFX KeyPressed Event Example”);

stage.setScene(scene);

stage.show(); } }

221Marius Claassen,

Java Intermediate

222

KeyPressed Event

Marius Claassen,

Java Intermediate

Lecture 49: keyPressed exercise

Implement the setOnKeyPressed() method to

print whether or not the TAB key is pressed

223Marius Claassen,

Java Intermediate

Lecture 49: keyPressed exercise









224Marius Claassen,

Java Intermediate








scene.setFill(Color.GREENYELLOW);

225Marius Claassen,

Java Intermediate

// TODO: Implement the setOnKeyPressed() to print whether or not

// TODO: the TAB key is pressed

stage.setTitle(“JavaFX KeyPressed Event Solution”);


stage.show(); } }

226Marius Claassen,

Java Intermediate

Lecture 50: keyPressed solution









227Marius Claassen,

Java Intermediate








scene.setFill(Color.GREENYELLOW);

228Marius Claassen,

Java Intermediate

scene.setOnKeyPressed(event -> text.setText(

event.getCode() == KeyCode.TAB ? “TAB key” : ”Not TAB key”) );

stage.setTitle(“JavaFX KeyPressed Event Solution”);


stage.show(); } }

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Java Intermediate

230

KeyPressed Event

Marius Claassen,

Java Intermediate

TOPICS

1. Introduction

2. Java data types

3. Library classes

4. Java classes


6. JavaFX

7. Conclusion

231Marius Claassen,

Java Intermediate

Lecture 51: Final remarks

232Marius Claassen,

Java Intermediate

To get details about this course:

• [email protected]

or

• https://www.udemy.com/course/1133518/manage/basics/

233Marius Claassen,

Java Intermediate

mailto:[email protected]

https://www.udemy.com/course/1133518/manage/basics/

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