java线程，

java线程，

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)