从JTextArea获取用户输入

Question

I'm trying to build a quiz program.

I decided that users enter their answers(numbers) into a JTextArea and the result will be shown on another JTextArea after a button click however I'm having troubles.

Here is partial of my code.

JButton btnNewButton = new JButton("Submit!");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {

                    if(textArea_3.equals("1"))
                            {
                                textArea_1.setText("Correct!");
                            }




        }
    });

Answer 1

I think you mean -

    if(textArea_3.getText().equals("1"))
    {
        textArea_1.setText("Correct!");
        //your code
    }

and not

textArea_3.equals("1")

You cannot compare JTextArea instance with a String instance. You will always get false.

Answer 2

if(textArea_3.equals("1"))

应该是if(textArea_3.getText().equals("1"))