Java 如何使用来自 JOptionPane.showInputDialog 的输入作为消息？
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How can I use the input from a JOptionPane.showInputDialog to be used as a message?
提问by Zahand
So, I need to take the input I get from (for example)
所以，我需要从我得到的输入（例如）
JOptionPane.showInputDialog(null, "text");
(and if the user enters some text, say, "hello" it would be used as a message in
（如果用户输入一些文本，比如“你好”，它将被用作消息
JOptionPane.showMessageDialog(null, "Hello");
I think I have to use a variable like: variable=JOptionPane.showInputDialog(null, "text");
我想我必须使用一个变量，如： variable=JOptionPane.showInputDialog(null, "text");
but how do I connect the two and what type will the variable have?
但是我如何连接两者以及变量有什么类型？
回答by Reimeus
回答by Vimal Bera
JOptionPane.showInputDialog("Provide Input");This statement returns String value which can be use to pass in showMessageDialog. Refer below code
JOptionPane.showInputDialog("Provide Input");此语句返回可用于传入的字符串值showMessageDialog。参考下面的代码
String ans=JOptionPane.showInputDialog("Give some input");
JOptionPane.showMessageDialog(null, ans);
回答by Azad
You can add it in one line,
您可以在一行中添加它，
JOptionPane.showMessageDialog(null,JOptionPane.showInputDialog(null,"Please enter a message"));
Or, you can create a string to hold a message:
或者，您可以创建一个字符串来保存消息：
String message = JOptionPane.showInputDialog(null,"Enter a message");
JOptionPane.showMessageDialog(null,message);
Note that first parameter may be null, in which case a default Frame is used as the parent, and the dialog will be centered on the screen (depending on the L&F).
请注意，第一个参数可能是null，在这种情况下，默认 Frame 用作父级，并且对话框将在屏幕上居中（取决于 L&F）。
Read about JOptionPane
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