设计模式-模板方法模式

public class TemplateMethodTest {
    public static void main(String[] args) {
        AbstractClass abstractClass = new Subclass1();
        abstractClass.operation();
        /**
         1111
         2222
         Subclass1 templateMethod...
         */
    }
}

abstract class AbstractClass {
    public void operation() {
        System.out.println("1111");
        System.out.println("2222");
        templateMethod();
    }

    protected abstract void templateMethod();
}

class Subclass extends AbstractClass {
    @Override
    protected void templateMethod() {
        System.out.println("Subclass templateMethod...");
    }
}

class Subclass1 extends AbstractClass {
    @Override
    protected void templateMethod() {
        System.out.println("Subclass1 templateMethod...");
    }
}