Template pattern of Java design pattern (Template)

Throwing bricks and attracting jade

Excerpted from: "Dahua Design Patterns"

Repetition = error-prone + hard-to-change

The test paper copied by student Zhang San

public class ZhangSanPaper {

	public void test1(){ //试题1
		System.out.println("不属于java关键字: A.int B.user C.static D.public");
		System.out.println("答案:b");
	}
	
	public void test2(){ //试题2
		System.out.println("console.log(false == '0');console.log(false === '0');console.log(false == 'false');输出结果为 "
				+ " A.true false fasle B.false fasle true C.false true  fasle D.flale false fasle");
		System.out.println("答案:a");	
	}
	
	public void test3(){ //试题3
		System.out.println("使用Java语言编写的源程序保存时的文件扩展名是（ ）。（A）.class （B）.java （C）.cpp （D）.txt");
		System.out.println("答案:b");	
	}
}

The test paper copied by Li Si

public class LiSiPaper {

	public void test1(){ //试题1
		System.out.println("不属于java关键字: A.int B.user C.static D.public");
		System.out.println("答案:c");
	}
	
	public void test2(){ //试题2
		System.out.println("console.log(false == '0');console.log(false === '0');console.log(false == 'false');输出结果为 "
				+ " A.true false fasle B.false fasle true C.false true  fasle D.flale false fasle");
		System.out.println("答案:b");	
	}
	
	public void test3(){ //试题3
		System.out.println("使用Java语言编写的源程序保存时的文件扩展名是（ ）。（A）.class （B）.java （C）.cpp （D）.txt");
		System.out.println("答案:a");	
	}
}

test

package moban.shejimoshi.test02;

public class Test {

	public static void main(String[] args) {
		System.out.println("学生张三抄的试卷");
		ZhangSanPaper zhangSanPaper = new ZhangSanPaper();
		zhangSanPaper.test1();
		zhangSanPaper.test2();
		zhangSanPaper.test3();
		
		System.out.println("=======================================");
		
		System.out.println("学生李四抄的试卷");
		LiSiPaper liSiPaper = new LiSiPaper();
		liSiPaper.test1();
		liSiPaper.test2();
		liSiPaper.test3();
	}
}

Refine the code

Test paper parent code

public class TestPaper {

	public void test1(){ //试题1
		System.out.println("不属于java关键字: A.int B.user C.static D.public");
	}
	
	public void test2(){ //试题2
		System.out.println("console.log(false == '0');console.log(false === '0');console.log(false == 'false');输出结果为 "
				+ " A.true false fasle B.false fasle true C.false true  fasle D.flale false fasle");
	}
	
	public void test3(){ //试题3
		System.out.println("使用Java语言编写的源程序保存时的文件扩展名是（ ）。（A）.class （B）.java （C）.cpp （D）.txt");
	}
	
}

The test paper copied by student Zhang San

package moban.shejimoshi.test03;

public class ZhangSanPaper extends TestPaper{

	@Override
	public void test1(){ //试题1
		super.test1();
		System.out.println("答案:b");
	}
	
	@Override
	public void test2(){ //试题2
		super.test2();
		System.out.println("答案:a");	
	}
	
	@Override
	public void test3(){ //试题3
		super.test3();
		System.out.println("答案:a");	
	}
}

The test paper copied by Li Si

package moban.shejimoshi.test03;

public class LiSiPaper extends TestPaper{

	@Override
	public void test1(){ //试题1
		super.test1();
		System.out.println("答案:c");
	}
	
	@Override
	public void test2(){ //试题2
		super.test2();
		System.out.println("答案:b");	
	}
	
	@Override
	public void test3(){ //试题3
		super.test3();
		System.out.println("答案:c");	
	}
}

test code

parent code

package moban.shejimoshi;

public class TestPaper {

	public void test1(){ //试题1
		System.out.println("不属于java关键字: A.int B.user C.static D.public");
		System.out.println("答案:"+answer1());
	}
	
	public void test2(){ //试题2
		System.out.println("console.log(false == '0');console.log(false === '0');console.log(false == 'false');输出结果为 "
				+ " A.true false fasle B.false fasle true C.false true  fasle D.flale false fasle");
		System.out.println("答案:"+answer2());	
	}
	
	public void test3(){ //试题3
		System.out.println("使用Java语言编写的源程序保存时的文件扩展名是（ ）。（A）.class （B）.java （C）.cpp （D）.txt 2");
		System.out.println("答案:"+answer3());	
	}
	
	public String answer1() {
		return "";
	}
	public String answer2() {
		return "";
	}
	public String answer3() {
		return "";
	}
}

Zhang San

public class ZhangSanPaper extends TestPaper {

	@Override
	public String answer1() {
		return "a";
	}
	@Override
	public String answer2() {
		return "b";
	}
	@Override
	public String answer3() {
		return "b";
	}
}

Li Si

public class LiSiPaper extends TestPaper {

	@Override
	public String answer1() {
		return "b";
	}
	@Override
	public String answer2() {
		return "a";
	}
	@Override
	public String answer3() {
		return "d";
	}
}

test code