【成都校区*文章*构造方法和setter的效率】【黑马java培训】

package com.lxk.fast;

 

import com.google.common.collect.Lists;

import com.lxk.model.Car;

import com.lxk.model.Dog;

 

/**

 * 测试谁快 直接构造或者一个个set，他们的效率差多少

 *

 * @author LiXuekai on 2019/6/18

 */

public class FastIsConstructOrSet {

    public static void main(String[] args) {

        testFast();

    }

 

    /**

     * 使用JProfiler看时间占比

     */

    private static void testFast() {

        while (true) {

            //27.4%

            set();

            //72.6%

            construct();

        }

    }

 

    /**

     * 构造函数来给属性赋值

     */

    private static void construct() {

        Car car = new Car("oooo", 100, Lists.newArrayList(new Dog("aaa", true, true)));

    }

 

    /**

     * set来给属性赋值

     */

    private static void set() {

        Car car = new Car();

        car.setSign("oooo");

        car.setPrice(100);

        Dog dog = new Dog();

        dog.setName("aaa");

        dog.setAlive(true);

        dog.setLoyal(true);

        car.setMyDog(Lists.newArrayList(dog));

    }

}