摘要：分享牛原创，java callable使用，java Runnable使用。java线程池，java线程返回值。
1.1.1. java callable使用
package com.shareniu.thread;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
public class TaskRunable implements Runnable {
private String id;
public TaskRunable(String id) {
this.id = id;
}
public void run() {
System.out.println(id+"-----------");
}
public static void main(String[] args) throws InterruptedException, ExecutionException {
ExecutorService fixedThreadPool = Executors.newFixedThreadPool(5);
List<Future<String>> list=new ArrayList<Future<String>>();
for (int i = 0; i < 5; i++) {
list.add(fixedThreadPool.submit(new TaskRunable(i+""),i+""));
}
for (Future<String> future : list) {
if (future.isDone()) {
String string = future.get();
System.out.println(string);
}
}
fixedThreadPool.shutdown();
}
}
输出结果：
0
1
2
3
4
1.1.2. java Runnable使用
package com.shareniu.thread;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
public class TaskRunable implements Runnable {
private String id;
public TaskRunable(String id) {
this.id = id;
}
public void run() {
System.out.println(id+"-----------");
}
public static void main(String[] args) throws InterruptedException, ExecutionException {
ExecutorService fixedThreadPool = Executors.newFixedThreadPool(5);
List<Future<String>> list=new ArrayList<Future<String>>();
for (int i = 0; i < 5; i++) {
list.add(fixedThreadPool.submit(new TaskRunable(i+""),i+""));
}
for (Future<String> future : list) {
if (future.isDone()) {
String string = future.get();
System.out.println(string);
}
}
fixedThreadPool.shutdown();
}
}
输出：
0-----------
2-----------
3-----------
1-----------
0
4-----------
1
2
3
4
1.1.3. 总结
1.Runnable 方法public void run() 没有返回值并且不能抛异常。
2.Callable接口方法public String call() throws Exception 可以有返回值并且可以抛出异常。
3.返回值得接受是Future对象。
4.线程池跟线程的返回没有什么关系。
分享牛原创(尊重原创 转载对的时候第一行请注明，转载出处来自分享牛http://blog.csdn.net/qq_30739519)
