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EqualsTest.java
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/**
*
* Example of equals, hashCode methods.
*
*/
public class EqualsTest {
public static void main(String[] args) {
//construct to Integer objects
//notice the auto-boxing
Integer a = 1;
Integer b = 2;
//test the equals method
System.out.println("a = a: "+a.equals(a));
System.out.println("a = b: "+a.equals(b));
System.out.println("a = 1: "+a.equals(1));
//look at the hashCode method
System.out.println("a: "+a.hashCode());
System.out.println("b: "+b.hashCode());
System.out.println("2: "+(new Integer(2)).hashCode());
System.out.println("test: "+(new String("test")).hashCode());
/*
* Expected output:
*
* a = a: true
* a = b: false
* a = 1: true
* a: 1
* b: 2
* 2: 2
* test: 3556498
*
*/
}
}
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