Busy waiting is also known as busy-looping or spinning. It is a

multi-threading technique in which a process repeatedly checks if a

condition is true.

For example, a process can keep checking if any keyboard input is

available.

In general, busy waiting is considered as Anti-pattern that wastes

processor time, so it should be avoided.

Sample code for busy waiting is as follows:

Thread thread = new Thread(new Runnable() {

@Override

public void run() {

long timeToStop = System.currentTimeMillis() + 1000;

long currentTime = System.currentTimeMillis();

// Busy waiting

while (timeToStop > currentTime) {

currentTime = System.currentTimeMillis();

}

}

});

https://www.baeldung.com/cs/os-busy-waiting