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What I want is,

int x=3;

if (x==3 'during past 3 seconds')
{
//perform action
}
this should not disturb other actions of the program for this 3 secs.

yup. Neither got a working answer.

Here is what I want to achieve.

A class gets a rapidly changing integer from another class. As it changes so fast, I wanted to perform an action only when this number is stabilized. Like if the...

public static void main(String[] args)
{
boolean t=false;

long cuTime = System.currentTimeMillis();

while(t==false)
{
...