java -- 判断一个对象所属于的类

使用java关键字 instanceof

形式如下:

if(obj instanceof ClassA){
     System.out.println("this is ClassA~");
 }

更具体的实例：

public class ClassTest {

    public static void main(String[] args) {

        Inter in = new B();
        if(in instanceof A){
            System.out.println("A ````");
        }
        if(in instanceof B){
            System.out.println("B`````");
        }
    }


    interface Inter{
        public void doing();
    }
    static class B implements Inter{

        @Override
        public void doing() {
            System.out.println("this is B ~");
        }

    }
    static class A implements Inter{

        @Override
        public void doing() {
            System.out.println("this is A ~");
        }

    }
}