java无限线程

发布于 2024-12-18 08:12:38 字数 624 浏览 0 评论 0原文

我需要一个线程来检查 JAVA 桌面应用程序上的网络连接可用性。我有一个像这样的线程

    class DataSyncThread extends Thread {
     DataSyncThread() {
     }

     public void run() {
         while(true){
            try{
                System.out.println("Checking for network");
                InetAddress addr = InetAddress.getByName(host);
                if(addr.isReachable(MIN_PRIORITY)){
                    syncData();
                }
                this.sleep(1000000);
            }catch(Exception e){}
         }
     }
 }

现在，当我在构造函数中调用它时，应用程序永远不会加载。当我查看控制台（我触发从其中加载 jar ）线程工作时，它会在控制台中打印“检查网络”。

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原文

I need to have a thread which checks for network connection availability on a JAVA desktop app. I got a thread like this

    class DataSyncThread extends Thread {
     DataSyncThread() {
     }

     public void run() {
         while(true){
            try{
                System.out.println("Checking for network");
                InetAddress addr = InetAddress.getByName(host);
                if(addr.isReachable(MIN_PRIORITY)){
                    syncData();
                }
                this.sleep(1000000);
            }catch(Exception e){}
         }
     }
 }

Now when I call this in the constructer the app never loads. when I look into the console (I trigger the jar to load from it) the thread work, it prints "Checking for network" in the console.

help appreciated

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流绪微梦 2024-12-25 08:12:38

我的猜测是，您正在做类似的事情：

DataSyncThread thread = new DataSyncThread();
thread.run();

这将同步运行run()方法。您应该调用 start() 来创建一个单独的执行线程：

DataSyncThread thread = new DataSyncThread();
thread.start();

我还建议实现 Runnable 而不是扩展 Thread - 或者很可能如果您希望定期执行，请使用 Timer 代替。我希望你的真实代码也记录在你的 catch 块中......

My guess is that you're doing something like:

DataSyncThread thread = new DataSyncThread();
thread.run();

That will run the run() method synchronously. You should be calling start() to create a separate thread of execution:

DataSyncThread thread = new DataSyncThread();
thread.start();

I would also recommend implementing Runnable instead of extending Thread - or quite possibly using a Timer instead, given that you want periodic execution. I hope your real code has logging in your catch block, too...

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