【www.bbyears.com--js教程】
代码如下 package com.letv.cloud.cdn.jtest;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.slf4j.LoggerFactory;
import com.google.common.base.Stopwatch;
public class JtestMain {
private final static org.slf4j.Logger LOGGER = LoggerFactory.getLogger("JtestMain");
private static Stopwatch stopWatch = new Stopwatch();
public static void testList(int num){
List
List
stopWatch.reset();
stopWatch.start();
for(int i=0; i
}
LOGGER.info("insert num:{} ArrayList cost:{} ms",num,stopWatch.elapsedTime(TimeUnit.MILLISECONDS));
stopWatch.reset();
stopWatch.start();
for(int i=0; i
}
LOGGER.info("insert num:{} LinkedList cost:{} ms",num,stopWatch.elapsedTime(TimeUnit.MILLISECONDS));
}
public static void main(String[] args) throws InterruptedException, IOException {
int[] nums = {10000,10 * 10000,100 * 10000, 1000 * 10000, 10000 * 10000};
for(int i=0; i
}
}
}
测试结果：
代码如下INFO [main] (JtestMain.java:65) 11:50:47,480 -- insert num:10000 ArrayList cost:2 ms
INFO [main] (JtestMain.java:72) 11:50:47,484 -- insert num:10000 LinkedList cost:1 ms
INFO [main] (JtestMain.java:65) 11:50:47,490 -- insert num:100000 ArrayList cost:5 ms
INFO [main] (JtestMain.java:72) 11:50:47,495 -- insert num:100000 LinkedList cost:5 ms
INFO [main] (JtestMain.java:65) 11:50:47,504 -- insert num:1000000 ArrayList cost:8 ms
INFO [main] (JtestMain.java:72) 11:50:47,515 -- insert num:1000000 LinkedList cost:11 ms
INFO [main] (JtestMain.java:65) 11:50:47,606 -- insert num:10000000 ArrayList cost:89 ms
INFO [main] (JtestMain.java:72) 11:50:49,335 -- insert num:10000000 LinkedList cost:1729 ms
INFO [main] (JtestMain.java:65) 11:50:50,290 -- insert num:100000000 ArrayList cost:954 ms
INFO [main] (JtestMain.java:72) 11:51:14,263 -- insert num:100000000 LinkedList cost:23973 ms
从上面的测试数据我们可以看得到ArrayList 是LinkedList几倍了，数据越大它们的区别就越能体现出来了。