Question
class MyThread extends Thread
{
MyThread()
{
System.out.print(" MyThread");
}
public void run()
{
System.out.print(" bar");
}
public void run(String s)
{
System.out.println(" baz");
}
}
public class TestThreads
{
public static void main (String [] args)
{
Thread t = new MyThread()
{
public void run()
{
System.out.println(" foo");
}
};
t.start();
}
}
What will be the output of the program?
class MyThread extends Thread
{
MyThread()
{
System.out.print(" MyThread");
}
public void run()
{
System.out.print(" bar");
}
public void run(String s)
{
System.out.println(" baz");
}
}
public class TestThreads
{
public static void main (String [] args)
{
Thread t = new MyThread()
{
public void run()
{
System.out.println(" foo");
}
};
t.start();
}
}
Answer: Option B
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Option B is correct because in the first line of main we're constructing an instance of an
anonymous inner class extending from MyThread. So the MyThread constructor runs
and prints "MyThread". The next statement in main invokes start() on the new thread
instance, which causes the overridden run() method (the run() method defined in the
anonymous inner class) to be invoked, which prints "foo"
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