用线程Thread执行一些方法后，需要判断执行是否成功。

public void run() {}

run( ) 方法返回值是空, 怎么办?

解决方法：

Note 使用 call() 方法 Callable接口是 jdk 5 后新增的接口

代码：

package com.example.thread; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.concurrent.Callable; import android.util.Log; import com.example.StreamTool.StreamTool; public class MyThread1 implements Callable<String> { private static final String tag = "xxxyyy"; private String phone; private String name; public MyThread1(String name, String phone) { this.name = name; this.phone = phone; } // public MyThread1(String name, String phone) { // super(name); // this.phone = phone; // } // public void run() { // Log.i(tag, Thread.currentThread().getName() + "......start"); // String newpath = "http://www.dianping.com/ajax/json/account/reg/mobile/send"&flow=t&callback=DP._JSONPRequest._5"; // StringBuilder strBui = new StringBuilder(newpath); // // try { // URL url = new URL(strBui.toString()); // HttpURLConnection con = (HttpURLConnection) url.openConnection(); // con.addRequestProperty("Content-Type", "text/html; charset=UTF-8"); // con.addRequestProperty( // "User-Agent", // "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36"); // con.addRequestProperty("Cookie", "_hc.v=""0ffcdf91-a4d6-4b08-8800-3d59d2e2fe45.1413899372""; abtest="48,124|52,133|47,122|44,106|45,115"; __utma=1.29319792.1412090870.1413609669.1413645970.5; __utmz=1.1413645970.5.2.utmcsr=t.dianping.com|utmccn=(referral)|utmcmd=referral|utmcct=/xian; _tr.u=7dhY0yFhd9rY065F; tc=17; cy=17; cye=xian; t_rct=2172824|2171729|6457678; PHOENIX_ID=0a01743f-1492e1321c8-46e6a; 13.t=17deda7d2a7d8e46d84bf12a74627b72; 13.ts=cd3bd6495620e2a204912c4bdfd43220; thirdtoken=891671FC6B450418DD6E0611A3E4CF48; _hc.v=""1bdad871-405e-46e3-97d6-46571ad48e14.1413897928""; _tr.s=Zy1Ca2OAe1ptv06o; JSESSIONID=891671FC6B450418DD6E0611A3E4CF48"); // con.addRequestProperty("Referer", "http://t.dianping.com/register"); // con.setConnectTimeout(5000); // con.setRequestMethod("GET"); // // if (con.getResponseCode() == 200){ // InputStream inputStr = con.getInputStream(); // String info = new String(StreamTool.read(inputStr), "UTF-8"); // Log.i(tag, Thread.currentThread().getName() + info); // } // } catch (MalformedURLException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } catch (IOException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } catch (Exception e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } // // // } @Override public String call() throws Exception { Log.i(tag, Thread.currentThread().getName() + "......start"); String newpath = "http://www.dianping.com/ajax/json/account/reg/mobile/send"&flow=t&callback=DP._JSONPRequest._5"; StringBuilder strBui = new StringBuilder(newpath); try { URL url = new URL(strBui.toString()); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.addRequestProperty("Content-Type", "text/html; charset=UTF-8"); con.addRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36"); con.addRequestProperty("Cookie", "_hc.v=""0ffcdf91-a4d6-4b08-8800-3d59d2e2fe45.1413899372""; abtest="48,124|52,133|47,122|44,106|45,115"; __utma=1.29319792.1412090870.1413609669.1413645970.5; __utmz=1.1413645970.5.2.utmcsr=t.dianping.com|utmccn=(referral)|utmcmd=referral|utmcct=/xian; _tr.u=7dhY0yFhd9rY065F; tc=17; cy=17; cye=xian; t_rct=2172824|2171729|6457678; PHOENIX_ID=0a01743f-1492e1321c8-46e6a; 13.t=17deda7d2a7d8e46d84bf12a74627b72; 13.ts=cd3bd6495620e2a204912c4bdfd43220; thirdtoken=891671FC6B450418DD6E0611A3E4CF48; _hc.v=""1bdad871-405e-46e3-97d6-46571ad48e14.1413897928""; _tr.s=Zy1Ca2OAe1ptv06o; JSESSIONID=891671FC6B450418DD6E0611A3E4CF48"); con.addRequestProperty("Referer", "http://t.dianping.com/register"); con.setConnectTimeout(5000); con.setRequestMethod("GET"); float x = 3.4f; if (con.getResponseCode() == 200){ InputStream inputStr = con.getInputStream(); String info = new String(StreamTool.read(inputStr), "UTF-8"); Log.i(tag, Thread.currentThread().getName() + info); if(info.contains("200")) return "200"; } } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } // TODO Auto-generated method stub return "404"; } }

处理返回值

ExecutorService exec = Executors.newCachedThreadPool(); ArrayList<Future<String>> results = new ArrayList<Future<String>>(); for(int i = 0; i < num; i++) results.add(exec.submit(selectThread(telnumber))); for (Future<String> fs:results) try { if (fs.get().equals("200")) success++; } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ExecutionException e) { // TODO Auto-generated catch block e.printStackTrace(); } return success;

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