package collectiondemo;
import java.util.ArrayList;
import java.util.Collection;
public class Test03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Collection collection=new ArrayList();
Integer i1=new Integer(128);
Integer i2=new Integer(128);
Integer i3=new Integer(90);
collection.add(i1);
System.out.println(i1.equals(i2));//true
System.out.println(collection.contains(i1));//true
System.out.println(collection.contains(i2));//true
System.out.println(collection.contains(i3));//false
}
}