javacalculatoreclipse-luna

The methods setText() and getText() are undefined for the type String in Java?

I'm building a calculator with in Java by using Eclipse - Luna, but when adding the code of "Entering the number" I get two error messages as follow:

The Code:

    JButton btn8 = new JButton("8");
    btn8.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {

            String EnterNumber = TxtDisplay.getText() + btn8.getText();
            TxtDisplay.setText(EnterNumber );
        }
    });
    btn8.setFont(new Font("Tahoma", Font.BOLD, 18));
    btn8.setBounds(79, 137, 50, 50);
    frame.getContentPane().add(btn8);

The Error Messages:

The method getText() is undefined for the type String
The method setText(String) is undefined for the type String

Could anyone help me please?

Solution

  • If you are willing to display the content of TxtDisplay on GUI, that implies TxtDisplay has to be a JTextField.

    Look up your code you'll find String TxtDisplay; replace it by JTextField TxtDisplay;.

    Once you do that you can access public methods of class JTextField such as getText() and setText(String).

    Side note: Please next time choose a better title for your question, this is for your own benefit so our community can interact with you better.