问题
i am facing a problem while making an application of Blackberry that i have upto 7 threds call, of which each downloads an audio from the Server and it works fine but when i start my application twice then an uncaught exception has been occurred that "TOO MANY THREADS ERROR EXCEPTION", So, let me know that how i can solve this problem.
回答1:
i think instead of starting 7 threads use single thread. 1. create a TaskWorker class
public class TaskWorker implements Runnable {
private boolean quit = false;
private Vector queue = new Vector();
public TaskWorker() {
new Thread(this).start();
}
private Task getNext() {
Task task = null;
if (!queue.isEmpty()) {
task = (Task) queue.firstElement();
}
return task;
}
public void run() {
while (!quit) {
Task task = getNext();
if (task != null) {
task.doTask();
queue.removeElementAt(task);
} else {// task is null and only reason will be that vector has no more tasks
synchronized (queue) {
try {
queue.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
public void addTask(Task task) {
synchronized (queue) {
if (!quit) {
queue.addElement(task);
queue.notify();
}
}
}
public void quit() {
synchronized (queue) {
quit = true;
queue.notify();
}
}
}
2. create a abstract Task class
public abstract class Task {
abstract void doTask();
}
3. now create task.
public class DownloadTask extends Task{
void doTask() {
//do something
}
}
4. and add this task to the taskworker thread
TaskWorker taskWorker = new TaskWorker();
taskWorker.addTask(new DownloadTask());
回答2:
If it happens when you RESTART the application, it means you must have some zombies... are you sure to join all your threads ?
来源:https://stackoverflow.com/questions/3394560/too-many-threads-error-exception