按下按钮时显示另一个按钮并打印偶数 [英] Display another button and print even numbers when button pressed

问题描述

这是我下面的代码，我无法在其中添加第二个按钮.我以某种方式设法创建了一个按钮，以及如何在按下按钮时显示一组偶数

This is my code below I am not able to add a second button in it. I have somehow managed to create one button and how can display set of even numbers when a button is pressed

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class Example2 extends JFrame {

public Example2() {
        initUI();
    }

public final void initUI() {
        JPanel panel = new JPanel();
        getContentPane().add(panel);
        panel.setLayout(null);
        panel.setToolTipText("A Panel container");

        JButton button = new JButton("Even");
        button.setBounds(100, 60, 100, 30);
        button.setToolTipText("A button component");

        JButton button2 = new JButton("Odd");
        button2.setBounds(100, 60, 100, 30);
        button2.setToolTipText("A button component");



        panel.add(button);
        panel.add(button2);

        setTitle("Tooltip");
        setSize(300, 200);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }
    public static void main(String[] args) {
                Example2 ex = new Example2();
                ex.setVisible(true);

    }

}

推荐答案

放弃 null 布局并使用真正的 LayoutManager，您的两个按钮都会出现在布局中.请参阅 Swing 布局管理器教程以获得一些示例代码

Ditch the null layout and use a real LayoutManager and both your buttons will appear in the layout. Consult the Swing layout manager tutorial for some sample code

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