https://stackabuse.com/synchronized-keyword-in-java/#:~:text=To%20avoid%20such%20issues%2C%20Java,the%20resource%20to%20become%20free.
public class NonSynchronizedMethod {
public void printNumbers() {
System.out.println("Starting to print Numbers for " + Thread.currentThread().getName());
for (int i = 0; i < 5; i++) {
System.out.println(Thread.currentThread().getName() + " " + i);
}
System.out.println("Completed printing Numbers for " + Thread.currentThread().getName());
}
}
class ThreadOne extends Thread {
NonSynchronizedMethod nonSynchronizedMethod;
public ThreadOne(NonSynchronizedMethod nonSynchronizedMethod) {
this.nonSynchronizedMethod = nonSynchronizedMethod;
}
@Override
public void run() {
nonSynchronizedMethod.printNumbers();
}
}
class ThreadTwo extends Thread {
NonSynchronizedMethod nonSynchronizedMethod;
public ThreadTwo(NonSynchronizedMethod nonSynchronizedMethod) {
this.nonSynchronizedMethod = nonSynchronizedMethod;
}
@Override
public void run() {
nonSynchronizedMethod.printNumbers();
}
}
public class TestSynchronization {
public static void main(String[] args) {
NonSynchronizedMethod nonSynchronizedMethod = new NonSynchronizedMethod();
ThreadOne threadOne = new ThreadOne(nonSynchronizedMethod);
threadOne.setName("ThreadOne");
ThreadTwo threadTwo = new ThreadTwo(nonSynchronizedMethod);
threadTwo.setName("ThreadTwo");
threadOne.start();
threadTwo.start();
}
}
public synchronized void printNumbers() {
System.out.println("Starting to print Numbers for " + Thread.currentThread().getName());
for (int i = 0; i < 5; i++) {
System.out.println(Thread.currentThread().getName() + " " + i);
}
System.out.println("Completed printing Numbers for " + Thread.currentThread().getName());
}
