如何在 Java GUI 中将消息打印到屏幕上？
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How do I print messages to the screen in my Java GUI?
提问by Dave Fisher
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.
我正在创建一个 GUI ATM 机。如何将消息打印到屏幕上？我有按钮 0-9 以及输入和取消设置，供用户按下。
回答by Griffin W.
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:
您应该将 JTextField 或 JLabel 放入您的程序中。这两个组件显示用户可以阅读的文本。我建议使用 JTextField，主要是因为我喜欢使用文本框。以下是如何使用文本的示例：
http://leepoint.net/notes-java/GUI/components/30textfield/11textfield.html
http://leepoint.net/notes-java/GUI/components/30textfield/11textfield.html
Basically you should do
基本上你应该做
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:
其中 myOutput 是您选择的 JTextField 变量，16 是 GUI 中 JTextField 的长度。要显示消息：
myOutput.setText("some text");
You can also initialize the value of the JTextField while declaring the text field at the same time
您还可以在声明文本字段的同时初始化 JTextField 的值
JTextField myOutput = new JTextField("someInitialValue", 20);
The code speaks for itself
代码不言自明
Hope this helps
希望这可以帮助
回答by Charles Sprayberry
You would want to assign this value to some GUI component, such as a JTextFieldor JLabel, by using the setText(String text)method on said component.
您可能希望通过使用该组件上的方法将此值分配给某个 GUI 组件，例如 aJTextField或。JLabelsetText(String text)
