b.java

来自「io」· Java 代码 · 共 22 行

package com.d;

public class B implements Work {

	private Work work;

	public B(Work work) {
		this.work = work;
	}

	public void insert() {

		System.out.println("start...");

		work.insert();

		System.out.println("end.");

	}

}