compare1.java

Java讲义与实例

class Aclass{
    int cint=1;
    }
public class Compare1{
    String s1=new String("abc");
    String s2=new String("abc");
    int i1=1,i2=1;
    public static void main(String arg[]){
        Compare1 c=new Compare1();
        Aclass c1=new Aclass();
        Aclass c2=new Aclass();
        System.out.println("i1==i2?"+(c.i1==c.i2));
        System.out.println("s1.equals(s2)?"+(c.s1.equals(c.s2)));
        System.out.println("s1==s2?"+(c.s1==c.s2));
        c.s1=c.s2;
        System.out.println("s1.equals(s2) after s1=s2?"+(c.s1.equals(c.s2)));
        System.out.println("s1==s2 after s1=s2?"+(c.s1==c.s2));
        System.out.println("c1==c2?"+(c1==c2));
        System.out.println("c1.equals(c2)?"+(c1.equals(c2)));
        c1=c2;
        System.out.println("c1==c2 after c1=c2?"+(c1==c2));
        System.out.println("c1.equals(c2) after c1=c2?"+(c1.equals(c2)));
        }
    }