`getValueIsAdjusting()`

In the previous program, the number in the text box changes continuously as the knob is moved. Usually you want this. But sometimes the change listener calls code that does a great deal of work. There may be hundreds of change events, and responding to each one would slow down the program. The following method can help avoid unnecessary work:

boolean getValueIsAdjusting()

This method returns true while the knob is still moving.

QUESTION 13:

Fill in the blank so that the following fragment changes the text field only after the knob has stopped.

source = (JSlider)evt.getSource() ;

if ( source. )  // consider the boolean return value
{
  if ( source.getName()().equals("sliderA") )
    textA.setText( source.getValue() + " " );
  if ( source.getName()().equals("sliderB") )
    textB.setText( source.getValue() + " " );
    
  // do an enormous amount of work here, using the new values
  . . . .
}