How to solve: Java graphical interface error: The interface display is misaligned

How to solve: Java graphical interface error: Interface display misalignment

Introduction:
With the continuous development of computer technology, graphical interface has become an important part of modern software development. important parts of. As a widely used programming language, Java also provides a rich graphical interface development toolkit, such as Swing and JavaFX. However, during the development process, we may encounter some problems, one of which is the misalignment of the graphical interface display. This article will cover some common causes and ways to fix the problem.

1. Cause analysis:

1. Layout manager problem: Java’s graphical interface uses a layout manager to layout components. If the layout manager is not selected properly, it may cause the interface to display dislocation.
2. Coordinate positioning problem: When using absolute coordinate positioning, if the calculated or set coordinates are inaccurate, the interface display may be misaligned.
3. Component size problem: If the size of the component is set improperly, it may cause the interface to be misaligned. For example, a size that is too small prevents the text from being fully displayed, or a size that is too large causing it to overlap.
4. Resolution difference problem: On different operating systems or different monitors, the resolution may be different, which may cause the interface display to be misaligned.

2. Solution:

1. Use a suitable layout manager:
   In Java, a variety of layout managers are provided, such as FlowLayout, BorderLayout, GridLayout etc. Depending on the interface requirements, choosing an appropriate layout manager can ensure the correct layout of components. For example, if you need to arrange a set of buttons vertically in a container, you can use BoxLayout or GridBagLayout.

Sample code:

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
        
        JButton button1 = new JButton("按钮1");
        JButton button2 = new JButton("按钮2");
        JButton button3 = new JButton("按钮3");
        
        add(button1);
        add(button2);
        add(button3);
        
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new MyFrame();
    }
}

2. Use relative coordinate positioning:
   Compared with absolute coordinate positioning, relative coordinate positioning is more flexible and less error-prone . Using Swing's layout manager or a third-party layout manager such as MigLayout, you can position the position and size of components through relative coordinates to ensure the correctness of the interface layout.

Sample code:

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new MigLayout());
        
        JButton button1 = new JButton("按钮1");
        JButton button2 = new JButton("按钮2");
        JButton button3 = new JButton("按钮3");
        
        add(button1, "cell 0 0");
        add(button2, "cell 1 0");
        add(button3, "cell 2 0");
        
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new MyFrame();
    }
}

3. Set the appropriate component size:

Sample code:

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(null);
        
        JTextField textField = new JTextField();
        textField.setBounds(10, 10, 200, 30);
        
        add(textField);
        
        setSize(400, 300);
        setLocationRelativeTo(null);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new MyFrame();
    }
}

4. Use adapter mode to handle resolution differences:
   Under different operating systems or different resolutions, use adapter mode to dynamically adjust the layout of the interface according to the actual screen resolution, thereby avoiding the problem of interface display misalignment.

Sample code:

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
        
        JButton button = new JButton("按钮");
        
        add(button);
        
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice gd = ge.getDefaultScreenDevice();
        int width = gd.getDisplayMode().getWidth();
        int height = gd.getDisplayMode().getHeight();
        
        if (width < 1366 || height < 768) {
            new MyFrame();
        } else {
            new MyFrameAdapter();
        }
    }
}

public class MyFrameAdapter extends MyFrame {
    public MyFrameAdapter() {
        setExtendedState(JFrame.MAXIMIZED_BOTH);
    }
}

Summary:
Java graphical interface display misalignment problem is a problem often encountered during the development process. It may be due to improper selection of layout manager, coordinates Caused by inaccurate positioning, improper component size settings, or resolution differences. This problem can be solved by choosing an appropriate layout manager, using relative coordinate positioning, setting appropriate component sizes, and using the adapter pattern to handle resolution differences. I hope the solutions in this article can help readers better develop Java graphical interface applications.

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