wait什么意思

#!/bin/bash
./my_program &
pid=$!
wait $pid
echo "my_program has finished."

synchronized (obj) {
    while (<condition does not hold>) {
        obj.wait();
    }
    // Perform action appropriate to condition
}

public class WaitNotifyExample {
    private boolean condition = false;

    public synchronized void waitForCondition() throws InterruptedException {
        while (!condition) {
            wait();
        }
        System.out.println("Condition is met!");
    }

    public synchronized void setCondition(boolean value) {
        condition = value;
        notifyAll();
    }

    public static void main(String[] args) throws InterruptedException {
        WaitNotifyExample example = new WaitNotifyExample();

        new Thread(() -> {
            try {
                example.waitForCondition();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }).start();

        Thread.sleep(1000); // Simulate some work
        example.setCondition(true);
    }
}