What is Starvation in JAVA Multi-threading ?

Starvation describes a situation where a greedy thread holds a resource for a long time so other threads are blocked forever. If you write a program in which several concurrent threads are competing for resources, you must take precautions to ensure fairness.
Thread starvation in multi-threading may happen because other “greedy” threads are gaining the lock and access to the shared resource, resulting in a thread (or a bunch of threads) getting starved of access to shared resources and CPU time.

Sample Program:


import java.io.BufferedWriter;

import java.io.FileWriter;

class StarvationTask {

public synchronized void filePrint(String helloMessage) {

try {

BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter("C:\\Users\\Sankesh\\Desktop\\architect\\a.txt"));

while(true) {

System.out.println("Hello i m writting in File"+Thread.currentThread().getName());

bufferedWriter.write(helloMessage);

}

} catch (Exception e) {

e.printStackTrace();

}}

}

public class StarvationDemo {

public static void main(String[] args) {

System.out.println("Starvation Demo");

StarvationTask starvationTask = new StarvationTask();

for(int i=0;i<=9;i++) {

new Thread(

new Runnable() {

@Override

public void run() { starvationTask.filePrint("hello i m writting in File"+Thread.currentThread().getName());
}
}
).start();
}}}

Sample Output: