Java 如何为 Swing 中的按钮创建点击事件？
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How to create on click event for buttons in swing?
提问by Suresh
My task is to retrieve a value of text field and display it in a alert box when clicking on the button. how to generate the on click event for button in java swing ?
我的任务是检索文本字段的值，并在单击按钮时将其显示在警告框中。如何在java swing中为按钮生成点击事件？
回答by alex2410
For that, you need to use ActionListener, for example:
为此，您需要使用ActionListener，例如：
JButton b = new JButton("push me");
b.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//your actions
}
});
For generating click event programmatically, you can use doClick()method of JButton: b.doClick();
要以编程方式生成点击事件，您可以使用以下doClick()方法JButton：b.doClick();
回答by Shocked
First, use a button, assign an ActionListener to it, in which you use JOptionPane to show the message.
首先，使用一个按钮，为其分配一个 ActionListener，在其中使用 JOptionPane 来显示消息。
class MyWindow extends JFrame {
public static void main(String[] args) {
final JTextBox textBox = new JTextBox("some text here");
JButton button = new JButton("Click!");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(this, textBox.getText());
}
});
}
}
