JavaSE 第十四讲 面向对象详解 10.2

1. return; 方法返回，后面不再执行

2.引用类型：用在对象上
通过引用变量操纵对象

public class ReferenceTest
{
    int a = 4;

    public static void main(String[] args)
{
       ReferenceTest rt = new ReferenceTest();

       ReferenceTest rt2 = new ReferenceTest();

       rt2 = rt;

       rt.a = 5;

       System.out.println(rt.a);

       System.out.println(rt2.a);
}

}