public class VolatileTest { public static void main(String[] args) { VolatileExample example = new VolatileExample(); // 启动一个线程，修改flag的值 new Thread(() -> { example.setFlag(); System.out.println(Thread.c

public class VolatileTest {
public static void main(String[] args) {
VolatileExample example = new VolatileExample();

// Start a thread to modify the value of flag
new Thread(() -> {
example.setFlag();
System.out.println(Thread.currentThread().getName() + ": Flag is set to " + example.getFlag());
}).start();
}
}

class VolatileExample {
private volatile boolean flag;

public void setFlag() {
flag = true;
}

public boolean getFlag() {
return flag;
}
}

This code demonstrates the use of the `volatile` keyword in Java to ensure visibility of changes made by one thread to other threads. The `VolatileExample` class has a `flag` variable that is marked as `volatile`. When the `setFlag()` method is called, it sets the value of `flag` to `true`. In the `main()` method, a new thread is started to call `setFlag()`. The `getFlag()` method is used to retrieve the value of `flag`.

Please note that I am not executing the code, but providing an explanation.