java如何让JButton做某事

Question

我有我的JButton设置和一切，但它绝对没有做什么。有人能告诉我如何添加命令，例如system。出来打印LN或一些扫描命令到JButton

这是我的代码行。它非常简单，我正在测试JButton，以便将其添加到我的其他一些程序中

    import javax.swing.*;

    public class Swing extends JFrame {
    JButton load = new JButton("Load");
    JButton save = new JButton("Save");
    JButton unsubscribe = new JButton("Unsubscribe");

    public ButtonFrame() {
        super ("ButtonFrame");
        setSize(140, 170);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel pane = new JPanel();
        pane.add(load);
        pane.add(save);
        pane.add(unsubscribe);
        add(pane);
        setVisible(true);
}

    public static void main(String[] arguments) {
        ButtonFrame bf = new ButtonFrame();
    }
}

Answer 1

见How to Write an Action Listener

我建议你阅读整个教程（或者保留一个链接以供参考），因为它包含了所有的Swing基础知识

Answer 2

希望这有帮助

load.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e)            {
        //Here goes the action (method) you want to execute when clicked
        System.out.println("You clicked the button load");
    }
});   
//The same for save button
save.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e)            {
        //Here goes the action (method) you want to execute when clicked
         System.out.println("You clicked the button save");
    }
});