Label connection with textField in java - swing

Question

I wanted to take some value in currently available in label and add(calculate) with number
and display on the text field but there is errors
private void ch13ActionPerformed(java.awt.event.ActionEvent evt)
r1=Integer.parseInt(tLabel.getText()); //r2 and r1 are integers
// error .. It says "Void type not allowed here"
r2 = Integer.parseInt(tLabel.setText(String.valueOf("3")));
result=r1+r2;
creaditTxt.setText(result+"");
}
Then how do i solve this problem?

Answer 1

setText() returns void. So by doing this
r2 = Integer.parseInt(tLabel.setText(String.valueOf("3")));
you're saying that r2 = void. That's not possible.
You may want to have 2 textfields instead and a label to display the result
public class AddFrame extends JFrame {
private JLabel result = new JLabel();
private JTextField number1 = new JTextField(10);
private JTextField number2 = new JTextField(10);
private JButton addBut = new JButton("Add");
public AddFrame(){
setLayout(new GridLayout(4, 1));
add(result);
add(number1);
add(number2);
add(addBut);
addBut.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int num1 = Integer.parseInt(number1.getText());
int num2 = Integer.parseInt(number2.gettext());
int total = num1 + num2;
result.setText(String.valueOf(total));
}
});
}
public static void main(String[] args){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
AddFrame frame = new AddFrame();
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}