37 lines
1020 B
Java
37 lines
1020 B
Java
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Constructors
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public class Constructors {
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private static final String DEFAULT_MSG = "hey";
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private static final int DEFAULT_AMOUNT = 25;
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private String msg;
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private int amount;
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public Constructors( String msg, int amount ) {
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// use the 'this' keyword to reference to this object instance
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// variables, with out, msg and amount refer to the formal parameters
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this.msg = msg;
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this.amount = amount;
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}
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public Constructors( String msg ) {
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// must be first line in a constructor and calls the constructor
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// within this class with those formal parameters
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this( msg, DEFAULT_AMOUNT );
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}
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public Constructors() {
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// must be first line in a constructor and calls the constructor
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// within this class with those formal parameters
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this( DEFAULT_MSG );
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}
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public static void main( String[] args ) {
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// here, we demonstrate how all three constructors
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// can be called to construct an object
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new Constructors();
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}
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}
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