private void  computeButtonMouseClicked(java.awt.event.MouseEvent evt) {                                           
	int answer=0;
	int n=0;
	String inputString=null;
             
	inputString=nField.getText();
	n=Convert.toInt(inputString);
             
	for (int i=1; i<=n; i++){
		answer+=i;
	}
	loopLabel.setText(""+answer);
}
  

I should point out that we can eliminate the use of the inputString variable by combining the two steps of getting the text fromnField and Converting it to an int. If we do this, the two lines

inputString=nField.getText();
n=Convert.toInt(inputString);

become the single statement

n=Convert.toInt(nField.getText());

 

 

 

Sample Code 2