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I am trying to make calculator and i have an issue with JTextField. When I click numbers(JButtons) like 1,2,3,4,5 , they appears on JTextField like 54321. So, how can i change this to show 12345 instead of 54321?

public void actionPerformed(ActionEvent e) {

    JButton clickedButton = (JButton) e.getSource();


    String displayValue = parent.getDisplayValue();

    String clickedBtnValue = clickedButton.getText();

    parent.setDisplayValue(clickedBtnValue + displayValue); 

contentPane = new JPanel();
    textField = new JTextField(30);
    textField.setAlignmentX(Component.LEFT_ALIGNMENT);
    contentPane.add(textField);
    textField.setHorizontalAlignment(JTextField.RIGHT);
    textField.setBounds(10, 11, 152, 32);
    textField.setColumns(1);
    textField.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
    textField.addActionListener(eng);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 184, 312);

    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(null);
PM 77-1
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1 Answers1

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Did you really think about this BEFORE you asked the question?

You are in control of your code so you should understand what your code is doing:

parent.setDisplayValue(clickedBtnValue + displayValue);

The code is doing exactly what you tell it to do - the button text is appended before the existing text.

If you don't like it displayed that way then you can try:

parent.setDisplayValue(displayValue + clickedBtnValue);

If you want a better solution, you can use the replaceSelection(...) method as demonstrated in: How to add a shortcut key for a jbutton in java?

camickr
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