java设计模式——模板方法模式

《大话设计模式》第十章

package ch10;

public abstract class TestPaper {
	public abstract void answer1();
	public abstract void answer2();
	public abstract void answer3();
	
	public void question1() {
		System.out.println("问题1");
		System.out.println("答案:");
		answer1();
		System.out.println();
	}
	
	public void question2() {
		System.out.println("问题2");
		System.out.println("答案:");
		answer2();
		System.out.println();
	}
	
	public void question3() {
		System.out.println("问题3");
		System.out.println("答案:");
		answer3();
		System.out.println();
	}
}

package ch10;

public class TestPaperA extends TestPaper {

	@Override
	public void answer1() {
		System.out.println("A");
	}

	@Override
	public void answer2() {
		System.out.println("B");
	}

	@Override
	public void answer3() {
		System.out.println("C");
	}

}

package ch10;

public class TestPaperB extends TestPaper {

	@Override
	public void answer1() {
		System.out.println("B");
	}

	@Override
	public void answer2() {
		System.out.println("C");
	}

	@Override
	public void answer3() {
		System.out.println("A");
	}

}

package ch10;

/**
 * 模板方法模式
 * @author Administrator
 *
 */
public class Client {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.out.println("学生a抄的试卷");
		TestPaper a = new TestPaperA();
		a.answer1();
		a.answer2();
		a.answer3();
		
		System.out.println("学生b抄的试卷");
		TestPaper b = new TestPaperB();
		b.answer1();
		b.answer2();
		b.answer3();
	}

}

模板方法模式很简单，很容易理解。