What will be the output of the program?
public class SyncTest
{
public static void main (String [] args)
{
Thread t = new Thread()
{
Foo f = new Foo();
public void run()
{
f.increase(20);
}
};
t.start();
}
}
class Foo
{
private int data = 23;
public void increase(int amt)
{
int x = data;
data = x + amt;
}
}

and assuming that data must be protected from corruption, what—if anything—can you add to the preceding code to ensure the integrity of data?

Question

What will be the output of the program?
public class SyncTest 
{
    public static void main (String [] args) 
    {
        Thread t = new Thread() 
        {
            Foo f = new Foo();
            public void run() 
            {
                f.increase(20);
            }
        };
    t.start();
    }
}
class Foo 
{
    private int data = 23;
    public void increase(int amt) 
    {
        int x = data;
        data = x + amt;
    }
}

and assuming that data must be protected from corruption, what—if anything—can you add to the preceding code to ensure the integrity of data?

TuteeHUB · Accepted Answer

NA

TuteeHUB · Answer

Synchronize the run method.

TuteeHUB · Answer

Wrap a synchronize(this) around the call to f.increase().

TuteeHUB · Answer

The existing code will cause a runtime exception.

TuteeHUB · Answer

Synchronize the increase() method

1.	What will be the output of the program? public class SyncTest { public static void main (String [] args) { Thread t = new Thread() { Foo f = new Foo(); public void run() { f.increase(20); } }; t.start(); } } class Foo { private int data = 23; public void increase(int amt) { int x = data; data = x + amt; } } and assuming that data must be protected from corruption, what—if anything—can you add to the preceding code to ensure the integrity of data?
A.	Synchronize the run method.
B.	Wrap a synchronize(this) around the call to f.increase().
C.	The existing code will cause a runtime exception.
D.	Synchronize the increase() method
Answer» E.

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