JAVA_类与对象_交换两个变量的值

交换两个变量的值

class MyValue {
    
    
    private int val;
    public void setVal(int val) {
    
    
        this.val = val;
    }
    public int getVal() {
    
    
        return val;
    }
}
public class Test {
    
    
   public static void swap(MyValue value1,MyValue value2){
    
    
        int temp = value1.getVal();
        value1.setVal(value2.getVal());
        value2.setVal(temp);

    }

    public static void main(String[] args) {
    
    
        MyValue value1 = new MyValue();
        value1.setVal(10);
        MyValue value2 = new MyValue();
        value2.setVal(30);

        System.out.println("原来的：" + value1.getVal() + "  " +value2.getVal());
        swap(value1,value2);
        System.out.println("交换后：" + value1.getVal() + "  " +value2.getVal());

    }
}