package com.shrimpking.t11;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/10 12:13
 */
public interface Test
{
    void test();
}
package com.shrimpking.t11;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/10 12:13
 */
public class Tester
{
    public static long runTest(Test t){
        //毫秒
        long start = System.currentTimeMillis();
        t.test();
        long end  = System.currentTimeMillis();
        return end - start;

        //纳秒
//        long start = System.nanoTime();
//        t.test();
//        long end  = System.nanoTime();
//        return end - start;
    }
}
package com.shrimpking.t11;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/10 12:15
 */
public class ListTest
{
    public static <E> void testSuite(List<Integer> list){
        long addTime,getTime,setTime,removeTime;
        System.out.println("count\taddTime\tgetTime\tsetTime\tremoveTime\t");

        //在列表索引为0的位置添加1000个整数
        addTime = Tester.runTest(new Test()
        {
            @Override
            public void test()
            {

                for (int i = 0; i < 1000; i++)
                {
                    list.add(0,i);
                }
            }
        });

        //根据索引位置依次访问1000个元素
        getTime = Tester.runTest(new Test()
        {
            @Override
            public void test()
            {
                for (int i = 0; i < 1000; i++)
                {
                    list.get(i);
                }
            }
        });

        //从0到1000的索引处不断修改元素的值
        setTime = Tester.runTest(new Test()
        {
            @Override
            public void test()
            {
                for (int i = 0; i < 1000; i++)
                {
                    list.set(i,8888);
                }
            }
        });

        //始终删除索引为0位置的元素
        removeTime = Tester.runTest(new Test()
        {
            @Override
            public void test()
            {
                for (int i = 0; i < 1000; i++)
                {
                    list.remove(0);
                }
            }
        });

        System.out.printf("%d\t%d\t%d\t%d\t%d\n",1000,addTime,getTime,setTime,removeTime);
    }

    public static void main(String[] args)
    {
        ArrayList<Integer> arrayList = new ArrayList<>();
        LinkedList<Integer> linkedList = new LinkedList<>();

        System.out.println("Test ArrayList:");
        testSuite(arrayList);
        System.out.println("------------------");
        System.out.println("Test LinkedList:");
        testSuite(linkedList);

    }
}