public class Example { private boolean isReady = false; public synchronized void startProcessing() { while(!isReady) { try { wait(); } catch (InterruptedException e) { Thread.currentThread().interrupt(); return; } } // Perform processing after the condition is met } public synchronized void setReady() { isReady = true; notifyAll(); } }This implementation uses two synchronized methods - startProcessing and setReady. The startProcessing method waits until the isReady flag is set to true using the wait() method. The setReady method sets the flag to true and calls notifyAll to wake up all the waiting threads. The Map interface is part of the java.util package library, while the notifyAll method is part of the Object class also in the java.lang package.