number.java

Java程序

public class number
{	public int n;
	public boolean equals(Object obj)
	 {if(obj==this) return true;
      else if(!(obj instanceof number)) return false;
              number x=(number)obj;
      if(x.n==this.n) return true;
      else return false;     
     }	
	public static void main(String[] args) 
	{number p1=new number();
	 number p2=new number();
	 p1.n=31;p2.n=31;
	 System.out.println(p1==p2);
	 System.out.println(p1.equals(p2));
	}
}