如何在Java GUI中将消息打印到屏幕上？

Question

I'm creating a GUI ATM machine. How can I print messages to the screen? I have buttons 0-9 as well as an enter and cancel set up, for the user to press.

Answer 1

You should put a JTextField or a JLabel into your program. These two components display text that the user can read. I suggest using a JTextField, mostly because I love using text boxes. Here's an example of how to use the text:

http://leepoint.net/notes-java/GUI/components/30textfield/11textfield.html

Basically you should do

JTextField myOutput = new JTextField(16);

Where myOutput is what you choose the JTextField's variable to be and 16 is the length of the JTextField in the GUI. To display a message:

myOutput.setText("some text");

You can also initialize the value of the JTextField while declaring the text field at the same time

JTextField myOutput = new JTextField("someInitialValue", 20);

The code speaks for itself

Hope this helps

Answer 2

您可能想通过在该组件上使用setText(String text)方法将此值分配给某些GUI组件，例如JTextField或JLabel 。