test.java

来自「io」· Java 代码 · 共 17 行

package com.d;

public class Test {
	public static void main(String[] args) {
		
		A a = new A();
		
		Work w = new B(a);
		
		Work w2 = new B(w);
		
		Work w3 = new B(w2);
		
		w3.insert();
	}
}