arraylist-lambada-性能测试

package cn.com.one;
import java.util.ArrayList;
public class ttt {
    public static void main(String [] args) {        
        new Thread(()->{
            Thread.currentThread().setName(\"t2\");
            int k =0;
            String test2 = \"\";
            long startTime2 = System.currentTimeMillis();
            ArrayList< > arrayList2= new ArrayList<>(10);
            while(true){
                k += 1;
                test2 = \"我是第\"+k+\"个\";
                arrayList2.add(test2);
                if(k > 10000000)  break;
            }
            long overTime2 = System.currentTimeMillis();
            System.out.println(Thread.currentThread().getName()+(overTime2 - startTime2) / 1000+\"s\");
        }).start();
//----------------------------------------------------------------------------------------------------
        Runnable runnable =  ()->{
            Thread.currentThread().setName(\"t1\");
            int j =0;
            String test1 = \"\";
            long startTime1 = System.currentTimeMillis();
            ArrayList< > arrayList1 = new ArrayList<>(100);
            while (true) {
                j += 1;
                test1 = \"我是第\" + j + \"个\";
                arrayList1.add(test1);
                if (j > 10000000) break;
            }
            long overTime1 = System.currentTimeMillis();
            System.out.println(Thread.currentThread().getName()+(overTime1 - startTime1) / 1000 + \"s\");
        };
//----------------------------------------------------------------------------------------------------
        Thread.currentThread().setName(\"tmain\");
        int i =0;
        String test0 = \"\";
        long startTime0 = System.currentTimeMillis();
        ArrayList< > arrayList0= new ArrayList<>(1);
        while(true){
            i += 1;
            test0 = \"我是第\"+i+\"个\";
            arrayList0.add(test0);
            if(i > 10000000)  break;
        }
        long overTime0 = System.currentTimeMillis();
        System.out.println(Thread.currentThread().getName()+(overTime0 - startTime0) / 1000+\"s\");
//----------------------------------------------------------------------------------------------------
    }
}