Question

Output 我的背景图片不会居中。我正在使用BorderLayout.CENTER。其他所有东西都在正确的位置，除了背景图像，而不是居中，是左边的一点点。有关如何解决它的任何建议？谢谢你提前。

private JTextField tf;
private JLabel jl2;

   public void window() {
       ImageIcon ic = new ImageIcon("hangman.png");
      JFrame gameFrame = new JFrame();
      JPanel jp = new JPanel();
      JPanel jpLets = new JPanel();
      JPanel jpBlank = new JPanel();
      JPanel blankLet = new JPanel();
      JPanel imgPane = new JPanel();
      JPanel panel1 = new JPanel();
      JPanel panel2 = new JPanel();
      blankLet.setLayout(new BoxLayout(blankLet, BoxLayout.X_AXIS));
      panel2.setLayout(new BorderLayout());
      imgPane.setLayout(new BorderLayout());
      panel1.setLayout(new BorderLayout());
      panel1.setOpaque(false);//!!
     //jp.setBorder(BorderFactory.createTitledBorder(""));
      tf = new JTextField(1);
      JLabel img = new JLabel(ic, JLabel.CENTER);
      JLabel jl = new JLabel("Enter a letter", JLabel.CENTER);
      jl2 = new JLabel("Letters used:  ", JLabel.CENTER);
      JLabel jl3 = new JLabel("__ ", JLabel.CENTER);
      jl.setFont(new Font("Rockwell", Font.PLAIN, 20));
      tf.setFont(new Font("Rockwell", Font.PLAIN, 20));
      jl2.setFont(new Font("Rockwell", Font.PLAIN, 20));
      imgPane.add(img);
      jp.add(jl);
      jp.add(tf);
      jpLets.add(jl2);
      jpBlank.add(jl3);
      blankLet.add(jpLets);
      blankLet.add(jpBlank);
      panel1.add(imgPane, BorderLayout.CENTER);
      panel1.add(jp, BorderLayout.NORTH);
      panel1.add(blankLet, BorderLayout.SOUTH);
      panel2.add(panel1, BorderLayout.CENTER);
      gameFrame.setTitle("Hangman");
      gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      gameFrame.setIconImage(
      new ImageIcon("Hangman-Game-grey.png").getImage());
      gameFrame.setResizable(false);
      gameFrame.add(panel2);
      gameFrame.setSize(600, 600);
      gameFrame.setLocationRelativeTo(null);
      gameFrame.setVisible(true);

Answer 1

你可以尝试两件事

从此imgPane.setLayout(new BorderLayout());
如果一个不起作用，请尝试将标签添加到Panel而不是imgPane
```
panel1.add(img, BorderLayout.CENTER);
```
此外，panel2看起来没必要。摆脱它，只需将panel1添加到框架

尝试设置对齐

img.setAlignmentX(JLabel.CENTER_ALIGNMENT);
img.setAlignmentX(JLabel.CENTER_ALIGNMENT);

panel1.add(img, BorderLayout.CENTER);

这是我用来重建所需结果的代码

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;

public class HangManAlign extends JPanel {

    public HangManAlign() {
        JLabel guess = new JLabel("Guess");
        JTextField jtfGuess = new JTextField(3);

        JLabel label = new JLabel(new ImageIcon("images/Xpo9R.png"));

        JLabel bottom = new JLabel("Letters Used                __ __ __ __ __ __ __ __ __");
        bottom.setHorizontalAlignment(JLabel.CENTER);

        JPanel topPanel = new JPanel();
        topPanel.add(guess);
        topPanel.add(jtfGuess);

        setLayout(new BorderLayout());
        add(topPanel, BorderLayout.NORTH);
        add(label, BorderLayout.CENTER);
        add(bottom, BorderLayout.SOUTH);
        setBorder(new EmptyBorder(20, 20, 20, 20));

    }

    public static void createAndShowGui() {
        JFrame frame = new JFrame();
        frame.add(new HangManAlign());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setVisible(true);

    }

    public Dimension getPreferredSize() {
        return new Dimension(500, 500);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGui();
            }
        });
    }
}

enter image description here

我复制了整个图像并将其缩小到适当大小，这样您就可以看到它的中心位置。这是我用过的图像

enter image description here

图像不会与布局管理器对齐

1 个答案: