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最新推荐文章于 2025-12-11 08:58:14 发布

原创最新推荐文章于 2025-12-11 08:58:14 发布 · 75 阅读

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public class Demo03 extends JFrame {
    public static void main(String[] args) {
        new Demo03();
    }

    public Demo03() {

        Container container = this.getContentPane();
        //container.setLayout(null);

        JTextField textField = new JTextField("hello");
        JTextField textField1 = new JTextField("world",20);
        //布局
        container.add(textField,BorderLayout.NORTH);
        container.add(textField1,BorderLayout.SOUTH);


        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

public class Demo04 extends JFrame {
    public static void main(String[] args) {
        new Demo04();
    }

    public Demo04() {

        Container container = this.getContentPane();
        JPasswordField passwordField = new JPasswordField();
        passwordField.setEchoChar('*');
        container.add(passwordField);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}