test.java

java课程的资料以及实验的代码

class Test{
  int a,b;
Test(int i,int j) {
    a=i;
    b=j;
  }
 //可以在函数中改变对象状态
  void change(Test obj) {
    obj.a=50;
    obj.b=40;
  }
  void swapobj(Test x,Test y){
  Test temp=y;
   y=x;
   x=temp;
} 
public static void main(String a[])
{
	Test obj1=new Test(10,20);
	Test obj2=new Test(25,30);
	Test obj3=new Test(60,80);
    obj1.change(obj2);
    System.out.println(obj2.a+"   "+obj2.b);
    obj2.swapobj(obj1,obj3);
    System.out.println("obj1="+obj1.a+"   "+obj1.b);
    System.out.println("obj3="+obj3.a+"   "+obj3.b);
}
}