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Java equals

boolean java.lang.Object.equals(Object obj)
Indicates whether some other
object is "equal to" this one.
The equals method implements an
equivalence relation on non-null object references:
It is reflexive: for
any non-null reference value x, x.equals(x) should return true.
It ......

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public class HelloWorldApp { //an application
public static void main (String args[ ]){
System.out.println("Hello World!");
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