Java Multithreaded Exception Handling

There are several ways to handle exceptions in Java multi-threading:

1. Handle exceptions within the run method by using a try-catch statement, and then handle the exceptions in the catch block.

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        try {
            // 执行线程任务
        } catch (Exception e) {
            // 处理异常
        }
    }
}

1. When submitting a task using the submit method of ExecutorService, you can use the get method of the Future object to retrieve the execution result and catch exceptions when calling the get method.

ExecutorService executorService = Executors.newFixedThreadPool(10);
Future<?> future = executorService.submit(new MyRunnable());
try {
    future.get();
} catch (Exception e) {
    // 处理异常
}

1. Use the UncaughtExceptionHandler interface to handle uncaught exceptions. You can set a default handler for uncaught exceptions using the setDefaultUncaughtExceptionHandler method in the Thread class, or set a specific handler for a thread using the setUncaughtExceptionHandler method in the Thread class.

Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        // 处理未捕获异常
    }
});

1. Customize an uncaught exception handler using the Thread.UncaughtExceptionHandler interface, and catch exceptions in the run method using a try-catch statement, then throw the exception through the uncaughtException method of the UncaughtExceptionHandler interface.

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        try {
            // 执行线程任务
        } catch (Exception e) {
            Thread.currentThread().getUncaughtExceptionHandler().uncaughtException(Thread.currentThread(), e);
        }
    }
}

Thread.UncaughtExceptionHandler handler = new Thread.UncaughtExceptionHandler() {
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        // 处理未捕获异常
    }
};
Thread thread = new Thread(new MyRunnable());
thread.setUncaughtExceptionHandler(handler);
thread.start();

You can choose a suitable processing method based on specific needs, regardless of which method is used.