need help to call another class

hi,
some examples i found online to call another class but during practice i stuck in GUI once i call another class. hope somebody can help me pls..

i have one class name 'nestedLoop' that makes output: 60

Code:

---

public class nestedLoop {

public static void main(String[] args) {

int sum=0 ;
for (int i=0; i<5; i++) { sum+= i;
for (int j=0; j<5; j++) {sum =sum+j;} }
System.out.print(sum);
}
}

---

and now i have a GUI where has button 'showResult' to show that output in TextArea..

Code:

---

public void actionPerformed(ActionEvent e) {
if (e.getSource()==showResult)
nestedLoop np= new nestedLoop();

{txtArea.setText(np.getText); }

---

what should i write instead of txtArea.setText(np.getText) ??

If you want the text to go to a text area then you need a method that returns a String rather than one that prints to System.out. You then call on that method to give you the String which you set onto your text area.

hallo doha786

i think your design is weak. my suggestion is to create a class with the ActionListener and to pass the JTextField and the sum as constructor arguments so that the constructor can implement your requirement with JTextField.addText(sum).