要在ComboBox中列出的多列和偏移量数组

import javax.swing.*;
import java.awt.*;

public class MultiColumnComboBoxExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Multi-Column ComboBox Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建数据模型
        MultiColumnComboBoxModel model = new MultiColumnComboBoxModel();
        model.addColumn("Column 1");
        model.addColumn("Column 2");
        model.addColumn("Column 3");

        // 创建ComboBox，并设置数据模型和偏移量数组
        JComboBox<String> comboBox = new JComboBox<>(model);
        comboBox.setRenderer(new MultiColumnComboBoxRenderer(model));
        comboBox.setPreferredSize(new Dimension(300, 30));
        comboBox.setColumnWidths(new int[]{100, 100, 100});

        // 添加ComboBox到窗口
        frame.getContentPane().add(comboBox);
        frame.pack();
        frame.setVisible(true);
    }
}

class MultiColumnComboBoxModel extends DefaultComboBoxModel<String[]> {
    private int[] columnWidths;

    public void setColumnWidths(int[] columnWidths) {
        this.columnWidths = columnWidths;
    }

    public int[] getColumnWidths() {
        return columnWidths;
    }
}

class MultiColumnComboBoxRenderer extends JPanel implements ListCellRenderer<String[]> {
    private MultiColumnComboBoxModel model;

    public MultiColumnComboBoxRenderer(MultiColumnComboBoxModel model) {
        this.model = model;
        setOpaque(true);
        setLayout(new BorderLayout());
    }

    @Override
    public Component getListCellRendererComponent(JList<? extends String[]> list, String[] value, int index, boolean isSelected, boolean cellHasFocus) {
        removeAll();

        int[] columnWidths = model.getColumnWidths();
        for (int i = 0; i < value.length; i++) {
            JLabel label = new JLabel(value[i]);
            label.setPreferredSize(new Dimension(columnWidths[i], 20));
            add(label, BorderLayout.WEST);
        }

        if (isSelected) {
            setBackground(list.getSelectionBackground());
            setForeground(list.getSelectionForeground());
        } else {
            setBackground(list.getBackground());
            setForeground(list.getForeground());
        }

        return this;
    }
}