模板模式

Posted 2021-01-02 bockpecehhe

　　我们将某些特定的逻辑处理编写为一个方法。其某些实现的操作由子类来实现

　　父类定义为抽象类  其中2个为抽象方法，意为由子类来实现  

父类

public abstract class TemplateDesgin {

    public abstract void doAnything();

    public abstract void doSomething();

    public final void doTemplate(){
        doAnything();
        doSomething();
    }

}　

子类　　

public class Test extends TemplateDesgin {

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

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

    public static void main(String[] args) {

        Test test = new Test();
        test.doTemplate();
    }
}

 

例如编写程序的计数耗时

父类

public abstract class TimeCounter {

    public abstract void programe();

    public final long timeCounterMethod(){

        long startTime = System.currentTimeMillis();
        programe();
        long endTime = System.currentTimeMillis();

        return (endTime-startTime);
    }
}

public class Time extends TimeCounter{

    @Override
    public void programe() {
        for(int i=0;i<10000000;i++){
            //System.out.print(i);
        }
    }

    public static void main(String[] args) {
        Time time = new Time();
        System.out.println(time.timeCounterMethod());
    }
}