Download - Java Course Day 3
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Day 3
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static
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null reference
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Java Arrays
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Type[] arrayName = new Type[elements count];
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int[] array1 = new int[10];
String[] array1 = new String[10];
Object[] array1 = new Object[10];
MyType[] array1 = new MyType[10];
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String[] colors = new String[] {“red”, “blue”, “white”};
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How To Access Elements?
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String[] friends = new String[10];
friends[0] = “Oleg”;
friends[1] = “Alex”;
friends[3] = “Irina”;
System.out.println(friends[1]);
System.out.println(friends[3]);
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Multidimensional arrays
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Type[][] arrayName = new Type[rows count][columns count];
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Java Loops
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while (condition) { ….}
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do { ….} while (condition);
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for (counter; condition; increment) { ….}
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Goals
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Packages
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(Private, Protected, Public, default)Access Levels
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Private – this class only
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Protected – this class and children
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Public – no limits
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default – package private
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Encapsulation
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final
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Interfaces
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Class casting
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Never, Never, Never, Never Give Up!
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