GUI 的核心技術 Swing

我們知道AWT是在java.awt包下那麼同理Swing應該在 javax.swing包下

建立一個JFrame窗口

public class JFrameDemo {
    public static void main(String[] args) {
        //JFrameDemo.init(); //是init()方法靜態然後通過類名直接調用
        //建立一個窗口
        new JFrameDemo().init();
    }

    // 初始化 init()
    public void init() {
        JFrame jFrame = new JFrame("這是一個JFrame窗口");
        //窗口的大小
        jFrame.setBounds(100,100,400,400);
        //窗口的大小不變
        jFrame.setResizable(false);
        //窗口的可見
        jFrame.setVisible(true);
        //標籤
        JLabel jLabel = new JLabel("這是一個JLabel");
        //把標籤添加到窗口中
        jFrame.add(jLabel);
        //標籤在窗口的中間
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);
        //獲得一個容器
        Container container = jFrame.getContentPane();
        container.setBackground(Color.green);
        //關閉窗口
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

面板

public class JFrameDemo2 {
    public static void main(String[] args) {
        /**
         * 面板
         */
        JFrameDemo2.init();
    }
    public static void init() {
        JFrame jFrame = new JFrame();
        //窗口的大小
        jFrame.setBounds(100,100,400,400);
        //獲得一個容器
        Container container = jFrame.getContentPane();
        container.setBackground(Color.green);
        //設置佈局
        container.setLayout(null);
        //窗口的可見
        jFrame.setVisible(true);
        JPanel jPanel = new JPanel();
        //面板的大小
        jPanel.setBounds(50,50,100,100);
        //面板的背景
        jPanel.setBackground(Color.red);
        jFrame.add(jPanel);
        //關閉窗口
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
}

彈窗

public class DialogDemo {
    public static void main(String[] args) {
        /**
         * 彈窗
         */
      new DialogDemo2().init();

    }
}

class  DialogDemo2 extends JFrame {
    public  void init() {
        //窗口的大小
        this.setBounds(100, 100, 400, 400);
        //窗口的可見
        setVisible(true);
        //獲得一個容器
        Container container = this.getContentPane();
        container.setLayout(null);

	//創建按鈕對象
        JButton jButton = new JButton("點我");
        //設置按鈕的大小
        jButton.setBounds(50, 50, 100, 100);
        container.add(jButton);
        //按鈕被監聽
        jButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                new MyDialogDemo();
            }
        });
    }
}

class MyDialogDemo extends JDialog {
    public MyDialogDemo() {
        //彈窗的大小
        this.setBounds(400, 400, 500, 500);
        //彈窗的可見
        this.setVisible(true);
        //混的一個容器
        Container container = this.getContentPane();
        //設置佈局
        container.setLayout(null);
        //添加標籤
        container.add(new Label("你來了"));
    }

}

標籤 (ICON 圖片) 圖片放在標籤上

public class IconDemo extends JFrame implements Icon {
    private int width;
    private int heigth;
    //無參構造
    public IconDemo() {}

    //有參構造
    public IconDemo(int width, int heigth) {
        this.width=width;
        this.heigth=heigth;
    }

    public void init() {
        IconDemo iconDemo = new IconDemo(15, 15);
        //圖標放在標籤，也可以放在按鈕上！
        JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);
	//獲得容器
        Container container = getContentPane();
        //添加標籤
        container.add(label);
	//窗口可見
        this.setVisible(true);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        //實例化
        new IconDemo().init();
    }


    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,heigth);
    }

    @Override
    public int getIconWidth() {
        return width;
    }

    @Override
    public int getIconHeight() {
        return heigth;
    }
}

獲得ICON圖片

public class ImageIconDemo extends JFrame {
    public void init() {
        JLabel label = new JLabel("ImageIconDemo");
        //獲取圖片地址
        URL url = ImageIconDemo.class.getResource("tx.jpg");
        ImageIcon imageIcon = new ImageIcon(url);
        label.setIcon(imageIcon);

	//標籤佈局
        label.setHorizontalAlignment(SwingConstants.CENTER);
        //獲得容器
        Container container = getContentPane();
        //添加標籤
        container.add(label);

	//設置窗口的大小
        setBounds(100,100,200,200);
        //窗口的可見
        setVisible(true);
        //關閉窗口
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new ImageIconDemo().init();
    }
}

JPanel 面板

public class JpanelDemo extends JFrame {
    public JpanelDemo() {
        //窗口的大小
        this.setBounds(100,100,400,400);
        //窗口的可見
        this.setVisible(true);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container container = this.getContentPane();
        container.setBackground(Color.green);

        container.setLayout(new GridLayout(2, 1, 10, 10)); //後面的參數的意思，間距
        container.setLayout(null);

        JPanel panel1 = new JPanel(new GridLayout(1, 3));
        JPanel panel2 = new JPanel(new GridLayout(1, 2));
        JPanel panel3 = new JPanel(new GridLayout(2, 1));
        JPanel panel4 = new JPanel(new GridLayout(3, 2));

        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));

        panel2.add(new JButton("2"));
        panel2.add(new JButton("2"));

        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));

        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));


        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

    }
    public static void main(String[] args) {
    new JpanelDemo();
    }
}

圖片按鈕

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01() {
        Container container = this.getContentPane();
        //將一個圖片變爲圖標
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        Icon icon = new ImageIcon(resource);

        //把這個圖標放在按鈕上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("圖片按鈕");

        //add
        container.add(button);
        //窗口的可見
        this.setVisible(true);
        //窗口的大小
        this.setSize(500, 500);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        /**
         * 按鈕
         */
        new JButtonDemo01();
    }
}

列表

下拉框

public class TestComboboxDemo01 extends JFrame {
    public TestComboboxDemo01() {
        //獲得一個容器
        Container container = this.getContentPane();
        JComboBox status = new JComboBox();
        status.addItem(null);
        status.addItem("正在熱映");
        status.addItem("已下架");
        status.addItem("即將上映");


        container.add(status);
        //窗口的可見
        this.setVisible(true);
        //窗口的大小
        this.setSize(500, 500);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

列表框

public class TestComboboxDemo02 extends JFrame {
    /**
     * 列表框
     */
    public TestComboboxDemo02() {
        Container container = this.getContentPane();
        Vector vector = new Vector();
        JList jList = new JList(vector);
        vector.add("張三");
        vector.add("李四");
        vector.add("王五");
        container.add(jList);

        //窗口的可見
        this.setVisible(true);
        //窗口的大小
        this.setSize(500, 500);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

文本框

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01() {
        //獲得一個容器
        Container container = this.getContentPane();

        JTextField textField = new JTextField("背景");
        JTextField textField1 = new JTextField("你好", 10);
        container.add(textField,BorderLayout.NORTH);
        container.add(textField1,BorderLayout.SOUTH);


        //窗口的可見
        this.setVisible(true);
        //窗口的大小
        this.setSize(500, 500);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo01();
    }
}

密碼框

public class TestTextDemo02 extends JFrame {
    /**
     * 密碼框
     */
    public TestTextDemo02() {
        Container container = this.getContentPane();
        JPasswordField passwordField = new JPasswordField();
        passwordField.setEchoChar('*');
        container.add(passwordField);

        //窗口的可見
        this.setVisible(true);
        //窗口的大小
        this.setSize(500, 500);
        //關閉窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo02();
    }
}