Showing error output in Jtextarea using netbeans

Question

I am creating a small application like calculator. I have jTextField,jTextArea and a Jbutton. When I type 121 and then button click I want to get the answer as 4 in Jtextarea. But when I click I am getting wrong answer as 242.

Following is my code:

 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        int va=Integer.parseInt( jTextField1.getText());
       int  vb= Integer.parseInt(jTextField1.getText());
      int ca= va+vb;
      jTextArea1.append(Integer.toString(ca));
      jTextArea1.append("\n");
    }

Answer 1

You're getting text from the same field twice, so 121+121 is 242...

But I want to get the answer as 1+2+1=4

Then you need to take each character in the String and add them together, for example...

    String text = "121";
    int result = 0;
    for (char c : text.toCharArray()) {
        result += Integer.parseInt(Character.toString(c));
    }

    System.out.println(result);

Which prints 4