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thread question

 
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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
 
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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
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thanks narendra
 
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