java - 如何设置图标没有间隙？

Question

我正在使用java swing。我想添加图片网格。

public class LayoutTest {
    JFrame frame = new JFrame("GridLayout demo");
    JPanel panel = new JPanel();
    JButton btn1 = new JButton("First");
    JButton btn2 = new JButton("Second");
    JButton btn3 = new JButton("Third");
    JButton btn4 = new JButton("Fourth");
    JPanel panel2 = new JPanel();
    JButton btn12 = new JButton("First2");
    JButton btn22 = new JButton("Second2");
    JButton btn32 = new JButton("Third2");
    JButton btn42 = new JButton("Fourth2");
    JPanel panel3 = new JPanel();
    JButton btn13 = new JButton("First2");
    JButton btn23 = new JButton("Second2");
    JButton btn33 = new JButton("Third2");
    JButton btn43 = new JButton("Fourth2");

    JLabel label13 = new JLabel(new ImageIcon("pictures/building.jpg"), JLabel.CENTER);
    JLabel label23 = new JLabel(new ImageIcon("pictures/building2.png"), JLabel.CENTER);
    JLabel label33 = new JLabel(new ImageIcon("pictures/building.jpg"), JLabel.CENTER);
    JLabel label43 = new JLabel(new ImageIcon("pictures/building2.png"), JLabel.CENTER);
    public LayoutTest() {
        panel3.setLayout(new GridLayout(2,2,0,0));
        panel3.add(label13);
        panel3.add(label23);
        panel3.add(label33);
        panel3.add(label43);

        frame.add(panel3);

        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.pack();
//        frame.setSize(40,40);
        frame.setVisible(true);
    }

}

结果我得到这个: 。我正在使用网格布局。我的图片尺寸为 20x20 像素。如何添加没有此水平间隙的图像？

Answer 1

谢谢安德鲁·汤普森!看来使用更大尺寸的网格效果很好!