public class DeadlockDemo {
public static Object addLock = new Object();
public static Object subLock = new Object();
public static void main(String args[]) {
MyAdditionThread add = new MyAdditionThread();
MySubtractionThread sub = new MySubtractionThread();
add.start();
sub.start();
}
private static class MyAdditionThread extends Thread {
public void run() {
synchronized (addLock) {
int a = 10, b = 3;
int c = a + b;
System.out.println("Addition Thread: " + c);
System.out.println("Holding First Lock...");
try { Thread.sleep(10); }
catch (InterruptedException e) {}
System.out.println("Addition Thread: Waiting for AddLock...");
synchronized (subLock) {
System.out.println("Threads: Holding Add and Sub Locks...");
}
}
}
}
private static class MySubtractionThread extends Thread {
public void run() {
synchronized (subLock) {
int a = 10, b = 3;
int c = a - b;
System.out.println("Subtraction Thread: " + c);
System.out.println("Holding Second Lock...");
try { Thread.sleep(10); }
catch (InterruptedException e) {}
System.out.println("Subtraction Thread: Waiting for SubLock...");
synchronized (addLock) {
System.out.println("Threads: Holding Add and Sub Locks...");
}
}
}
}
}
Deadlocks can occur for many different reasons. There is no single recipe to avoid deadlocks. Normally deadlocks occur when one synchronized object is waiting for lock on resources locked by another synchronized object.
This program demonstrates a Deadlock.
This deadlock arises because both the threads are waiting for the resources which are grabbed by other thread. They both keep waiting and no one releases.
#java #deadlock #deadlocks #cesarnog #code #threads
This program demonstrates a Deadlock.
This deadlock arises because both the threads are waiting for the resources which are grabbed by other thread. They both keep waiting and no one releases.
#java #deadlock #deadlocks #cesarnog #code #threads
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