OS Question
Print even and odd numbers in increasing order using two threads in Java

Question

OS Question

Print even and odd numbers in increasing order using two threads in Java

Accepted Answer

The idea is to create two threads and print even numbers with one thread and odd numbers with another thread. Below are the steps:

Create two threads T1 and T2 using the below syntax, where T1 and T2 are used to print odd and even numbers respectively.
Thread T1 = new Thread(new Runnable() {
public void run() { mt.printEvenNumber(); }
});

Thread T2 = new Thread(new Runnable() {
public void run() { mt.printOddNumber(); }
});

where,
printOddNumber() is used to print all the odd numbers till N,
printEvenNumber() is used to print all the even numbers till N.

Maintain a global counter variable and start both threads using the below function:
T1.start();
T2.start();

If the counter is even in the Thread T1, then wait for the thread T2 to print that even number. Otherwise, print that odd number, increment the counter and notify to the Thread T2 using the function notify().
If the counter is odd in the Thread T2, then wait for the thread T1 to print that even number. Otherwise, print that even number, increment the counter and notify the Thread T1 using the function notify().

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