我可以制作没有边框的JTable列吗？

当然可以！在Java Swing中，您可以通过自定义JTable的单元格渲染器（CellRenderer）和单元格编辑器（CellEditor）来实现没有边框的JTable列。以下是一个简单的示例：

自定义单元格渲染器：

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

public class NoBorderCellRenderer extends DefaultTableCellRenderer {
    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        setBorder(BorderFactory.createEmptyBorder());
        setOpaque(false);
        return super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
    }
}

自定义单元格编辑器：

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

public class NoBorderCellEditor extends DefaultCellEditor {
    public NoBorderCellEditor(JTextField textField) {
        super(textField);
        textField.setBorder(BorderFactory.createEmptyBorder());
    }
}

应用自定义渲染器和编辑器：

import javax.swing.*;
import javax.swing.table.TableColumn;

public class NoBorderJTableExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("No Border JTable Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        String[] columnNames = {"Column 1", "Column 2"};
        Object[][] data = {
                {"Row 1, Column 1", "Row 1, Column 2"},
                {"Row 2, Column 1", "Row 2, Column 2"}
        };

        JTable table = new JTable(data, columnNames);
        table.setRowHeight(20);

        NoBorderCellRenderer noBorderCellRenderer = new NoBorderCellRenderer();
        NoBorderCellEditor noBorderCellEditor = new NoBorderCellEditor(new JTextField());

        TableColumn column = null;
        for (int i = 0; i< table.getColumnCount(); i++) {
            column = table.getColumnModel().getColumn(i);
            column.setCellRenderer(noBorderCellRenderer);
            column.setCellEditor(noBorderCellEditor);
        }

        frame.add(new JScrollPane(table));
        frame.setSize(400, 200);
        frame.setVisible(true);
    }
}

这个示例将创建一个没有边框的JTable，您可以根据需要进行进一步的自定义。希望这个答案对您有帮助！