ex3_3_2.java

对java中最基本的几种数据的加

public class ex3_3_2  
{
    int x;
    public ex3_3_2(int x1){
      x=x1;
    }
    public static void main( String  args[ ] )
    {
        ex3_3_2 m1=new ex3_3_2(4);
        ex3_3_2 m2=new ex3_3_2(4);
        ex3_3_2 m3=m2;
        m3.x=6;
        System.out.println("m1=m2 is "+(m1==m2));
        System.out.println("m2=m3 is "+(m2==m3));
        System.out.println("m1.x=m2.x is "+(m1.x==m2.x));
    } 
}