AWT常用组件实战

- 日理万妓 2021-09-30 01:46 308阅读 0赞

**一 按钮与标签的使用**

1 代码

import java.awt.*;
    import java.awt.event.*;
    /**
    
    * @ClassName: GridFrameDemo
    
    * @Description: 按钮与标签的使用
    
    * @author Superhao+YuHong
    
    * @date 2016年12月22日 下午7:31:32  
    
    */
    
    import java.awt.*;
    import java.awt.event.*;
    
    public class AWTButtonLabel {
        private Frame myFrame;
        private Label headerLabel;
        private Label statusLabel;
        private Panel controlPanel;
        private Font font;
    
        public AWTButtonLabel() {
            myFrame = new Frame("Java按钮与标签案例");
            myFrame.setLayout(new GridLayout(3, 1));
            myFrame.addWindowListener(new WindowAdapter() {
                public void windowClosing( WindowEvent windowEvent ) {
                    System.exit(0);
                }
            });
    
            font = new Font("楷体", Font.PLAIN, 30);
            headerLabel = new Label();
            headerLabel.setAlignment(Label.CENTER);
            headerLabel.setFont(font);
    
            statusLabel = new Label();
            statusLabel.setAlignment(Label.CENTER);
            statusLabel.setSize(200, 100);
    
            controlPanel = new Panel();
            controlPanel.setLayout(new FlowLayout());
    
            myFrame.add(headerLabel);
            myFrame.add(controlPanel);
            myFrame.add(statusLabel);
            myFrame.setVisible(true);
        }
    
        private void showButtonDemo() {
            headerLabel.setText("按钮点击动作监控");
    
            Button okButton = new Button("确定");
            Button submitButton = new Button("提交");
            Button cancelButton = new Button("取消");
    
            font = new Font("楷体", Font.PLAIN, 20);
            statusLabel.setFont(font);
    
            okButton.addActionListener(new ActionListener() {
                public void actionPerformed( ActionEvent e ) {
                    statusLabel.setText("确定按钮被点击!");
                }
            });
    
            submitButton.addActionListener(new ActionListener() {
                public void actionPerformed( ActionEvent e ) {
                    statusLabel.setText("提交按钮被点击!");
                }
            });
    
            cancelButton.addActionListener(new ActionListener() {
                public void actionPerformed( ActionEvent e ) {
                    statusLabel.setText("取消按钮被点击!");
                }
            });
    
            controlPanel.add(okButton);
            controlPanel.add(submitButton);
            controlPanel.add(cancelButton);
            myFrame.pack();
            myFrame.setVisible(true);
        }
    
        public static void main( String[] args ) {
            AWTButtonLabel awtButtonDemo = new AWTButtonLabel();
            awtButtonDemo.showButtonDemo();
        }
    
    }

2 运行

![20190721154101179.png][]

**二 文本域使用**

1 代码

import java.awt.*;
    import java.awt.event.*;
    
    public class TestTextField {
        public static void main( String[] args ) {
            Frame frame = new Frame();
            frame.addWindowListener(new WindowAdapter() {
                public void windowClosing( WindowEvent windowEvent ) {
                    System.exit(0);
                }
            });
    
            Label message = new Label("请输入信息");
            TextField text = new TextField(10);
            Panel centerPanel = new Panel();
            Button enter = new Button("确认");
            enter.addActionListener(new ActionListener() {
                public void actionPerformed( ActionEvent e ) {
                    message.setText("输入信息为：" + text.getText());
                }
            });
            frame.add(message, BorderLayout.NORTH);
            centerPanel.add(text);
            centerPanel.add(enter);
            frame.add(centerPanel, BorderLayout.CENTER);
            frame.setSize(300, 200);
            frame.setTitle("文本域范例");
            frame.pack();
            frame.setVisible(true);
        }
    }

2 运行

![20190721154132487.png][]

**三 绘图空间使用**

1 代码

import java.awt.*;
    
    public class DrawCircle {
        public DrawCircle() {
            Frame frame = new Frame("DrawCircle");
            DrawCanvas draw = new DrawCanvas();
            frame.add(draw);
            frame.setSize(260, 250);
            frame.setVisible(true);
        }
    
        public static void main( String[] args ) {
            new DrawCircle();
        }
    
        class DrawCanvas extends Canvas {
            public void paint( Graphics g ) {   // 创建画布时，默认用此方法画图
                g.setColor(Color.BLUE);
                g.drawOval(10, 50, 80, 80);
                g.setColor(Color.BLACK);
                g.drawOval(80, 50, 80, 80);
                g.setColor(Color.RED);
                g.drawOval(150, 50, 80, 80);
                g.setColor(Color.RED);
                g.setFont(new Font("楷体", Font.BOLD, 20));
                g.drawString("好好学习、天天向上", 45, 200);
            }
        }
    }

2 运行

![20190721154214312.png][]

3 参考

绘制椭圆API请参考

[http://www.doc88.com/p-7798832222239.html][http_www.doc88.com_p-7798832222239.html]

[20190721154101179.png]: /images/20210724/3226910f117b4bc3a64338c2456e9cce.png
[20190721154132487.png]: https://img-blog.csdnimg.cn/20190721154132487.png
[20190721154214312.png]: https://img-blog.csdnimg.cn/20190721154214312.png
[http_www.doc88.com_p-7798832222239.html]: http://www.doc88.com/p-7798832222239.html