How to change the value of a variable in another thread from one thread in java?

Answer 1

i dont get it from thread to thread..
but if u mean from a function to another function, then u should declare the variable as static

Answer 2

actually the thread is one of the class.
So we can allocate the memory in the same class. or assign the another object to this class variable.
class summa extends Thread
{
summa s=new summa();
}
that's it.