Java线程组管理与优化技巧

ThreadGroup group = new ThreadGroup("MyGroup");
Thread thread = new Thread(group, () -> {
    System.out.println("Running in " + Thread.currentThread().getThreadGroup().getName());
});
thread.start();

int numThreads = group.activeCount();
Thread[] threads = new Thread[numThreads * 2]; // 数组要足够大
int actualSize = group.enumerate(threads);
for (int i = 0; i 

group.setMaxPriority(Thread.NORM_PRIORITY);
Thread highPriorityThread = new Thread(group, () -> {});
highPriorityThread.setPriority(Thread.MAX_PRIORITY); // 实际会被限制为NORM_PRIORITY
System.out.println(highPriorityThread.getPriority()); // 输出5

ThreadGroup group = new ThreadGroup("FaultTolerantGroup") {
    public void uncaughtException(Thread t, Throwable e) {
        System.err.println("Thread " + t.getName() + " failed: " + e.getMessage());
    }
};
new Thread(group, () -> { throw new RuntimeException("Oops!"); }).start();