feat(class44): 简单GUI界面
- 新增一个简单的登录窗口示例- 包含 JFrame、JPanel 和 JButton 的基本使用 -窗口大小设置为 300x200像素 - 添加了一个名为"登陆"的按钮
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src/class44/JFarmeDemo1.java
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src/class44/JFarmeDemo1.java
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package class44;
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import javax.swing.*;
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public class JFarmeDemo1 {
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public static void main(String[] args) {
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// 创建一个输入框,有一个登陆按钮
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JFrame win = new JFrame("登陆窗口");
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win.setSize(300,200); //窗口大小
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win.setLocationRelativeTo(null);//窗口居中
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win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //窗口关闭方式
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JPanel panel = new JPanel();
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win.add(panel);
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JButton btn = new JButton("登陆");
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btn.setBounds(100,100,100,50); //按钮位置和尺寸
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panel.add(btn);
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win.setVisible(true);
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}
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}
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