Advanced Java Programming - Old Questions
5. Discuss the use of multithreading with suitable example. (5)
Answer
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The process of executing multiple threads simultaneously is known as multithreading. The main purpose of multithreading is to provide simultaneous execution of two or more parts of a program to maximum utilize the CPU time. A multithreaded program contains two or more parts that can run concurrently. Each such part of a program called thread.
Example:
Program to create two threads. The first thread
should print numbers from 1 to 10 at intervals of 0.5 second and the second
thread should print numbers from 11 to 20 at the interval of 1 second.
class First extends Thread
{
@Override
public void run()
{
for (int i=1; i<=10; i++)
{
System.out.println(i);
try
{
Thread.sleep(500);
}
catch (InterruptedException e)
{
System.out.println(e.getMessage());
}
}
}
}
class Second extends Thread
{
@Override
public void run()
{
for (int i=11; i<=20; i++)
{
System.out.println(i);
try{
Thread.sleep(1000);
}
catch (InterruptedException e)
{
System.out.println(e.getMessage());
}
}
}
}
public class ThreadInterval
{
public static void main(String[] args)
{
Thread first = new First();
Thread second= new Second();
first.start();
second.start();
}
}