How Can I Gracefully Stop a Thread in Java?

Killing a Thread in Java

Killing a thread in Java is not a straightforward task as it may seem. The deprecated Thread.stop() method should never be used as it can lead to unexpected behavior and data corruption.

Recommended Approach

The preferred approach to terminating a thread is to use a shared variable as a flag. This variable can be set by an object requesting the thread to stop. The thread should periodically check the flag and terminate gracefully when it is set.

Example

Here's an example of how this approach can be implemented:

public class MyThread extends Thread {
    private boolean shouldStop;

    public void run() {
        while (!shouldStop) {
            // Perform your desired operations here...
        }
    }

    public void stopThread() {
        this.shouldStop = true;
    }
}

In this example, the shouldStop flag is checked within the thread's run() method. When the flag is set to true, the thread stops gracefully and terminates.

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