run method of MultiThreading

[beelow]

Hi Guys,

I am studying JAVA programing . I am little-bit confused about the multithreading concept.

I am aware that Calling run() method without calling start() method can successfully execute the run() method from the current thread.

But, Is it mandatory in multithreading to create run() method for each thread in multiple threads program?

Please suggest me to solve this query.

[Katty]

Hi,

According to my java knowledge, You will have to implement a run() method only once. And it is not mandatory to create run method for every thread while creating multithreding.

You are able to create as many threads to run that run() method concurrently.

I hope this will help you

[Zecho]

Multithreading in java is implemented by implementing Runnable interface or by using Thread class .

Below example may solve you problem:

Suppose, If you have a class ABC, in this situation for each instantiation of the ABC class you don't need a different implementation for this class .And same thing is happens with the run() method of multithreading.

[Reegan]

You may use one or more than on run method in the multithreading program. See the example example:


class Thread_demo3 extends Thread
{
public void run()
{
for(int i=1;i<=5;i++)
{
try{
Thread.sleep(500);
System.out.println("From Thread 1:"+i);

}catch(InterruptedException i3){System.out.println("HH");}
}
}
}
class Thread_demo4 extends Thread
{
public void run()
{
for(int i=1;i<=5;i++)
{
try
{
Thread.sleep(500);
System.out.println("From Thread 2:"+i);
}catch(InterruptedException i2){System.out.println("XX");}


}
}
}
class UseJoin
{
public static void main(String ss[])
{
try{
Thread t1=new Thread(new Thread_demo3());
Thread t3=new Thread(new Thread_demo3());
Thread t2=new Thread(new Thread_demo4());
t1.start();
t1.join();
t2.start();
t2.join();
t3.start();
t3.join();
for(int i=1;i<=5;i++)
{
try
{
Thread.sleep(500);
System.out.println("From Main:"+i);
}catch(InterruptedException i2){System.out.println("XX");}


}
}catch(InterruptedException i2){System.out.println("XX");}
}
}