thread question

[samdeep aarzoo]

class A implements Runnable {
public void run() {System.out.print(Thread.currentThread().getName());}
}
class B implements Runnable {
public void run() {
new A().run();
new Thread(new A(),"T2").run();
new Thread(new A(),"T3").start();
}}
class C {
public static void main (String[] args) {
new Thread(new B(),"T1").start();
}}

answer is:T1T1T3

can anyone explain how it works

[narendra darlanka]

hi,

only by calling the start method on an Thread object create an new thread of execution.all run()method call are just plain vanilla method calls so
there execution is sequential.
class A implements Runnable {
public void run()
{System.out.print(Thread.currentThread().getName());}
}

class B implements Runnable {
public void run() {
new A().run(); -->just call run method on A object ,no new thread(thread
is still T1
new Thread(new A(),"T2").run(); ->same case as above
new Thread(new A(),"T3").start(); -->starts an new thread T3
}}

class C {
public static void main (String[] args) {
new Thread(new B(),"T1").start(); --->starts an new execution thread "T1"
}} which inturn call run method

[samdeep aarzoo]

thanks narendra