How to switch focus using from one JTextField to another ??

Hi there,

I was wondering if anyone can help me. I have two JTextField and I
want to switch focus between one and the other so I can write different
words inside.

for instance here I wrote code for a button that when pressed writes
zero inside a JTextField:

 void zeroButton_mouseClicked(MouseEvent e) {
  boolean b,c = false;
     if(tableNoTextField.hasFocus())
      {
      b = true;
      System.out.println(b);
       inputTableNo = inputTableNo + "0";
       System.out.println(inputTableNo);
       tableNoTextField.setText(inputTableNo);
      }
    if(noOfGuestField.hasFocus())
      {
      c = true;
      System.out.println(c);
       guestNumber = guestNumber + "0";
       System.out.println(guestNumber);
       noOfGuestField.setText(guestNumber);
       }

}

Here I tried to switch the focus between one JTextField to another but
without success:

boolean x = false;
boolean y = false;
  void tableNoTextField_mouseClicked(MouseEvent e) {

      if(tableNoTextField.hasFocus())
      {
       x = true;
      System.out.println(x);

      tableNoTextField.requestFocus();
      System.out.println("tableNoTextField has focus");
      System.out.println(y);
      }
  }

  void noOfGuestField_mouseClicked(MouseEvent e) {

      if(noOfGuestField.hasFocus())
      {
       y = true;
      System.out.println(y);

      noOfGuestField.requestFocus();
      System.out.println("noOfGuestField has focus");
      System.out.println(x);
      }
  }

Can anyone tell me how to switch the focus from one component to
another please?