Multi Thread

import java.io.*;

class A extends Thread
{
public void run()
{
for(int i=1;i<=3;i++)
{
System.out.println(i+" Execution of thread A");
}
System.out.println("Exit A");
}
};


class B extends Thread
{
public void run()
{
for(int j=1;j<=3;j++)
{
System.out.println(j +" execution of thread B");
}
System.out.println("Exit B");
}
};

class C extends Thread
{
public void run()
{
for(int k=1;k<=3;k++)
{
System.out.println(k +" execution of thread c");
}
System.out.println("Exit C");
}
};

class multithread
{
public static void main(String args[])throws IOException
{
new A().start();
new B().start();
new C().start();
}
};