JTable如何去除标题边框

如何解决JTable如何去除标题边框

示例：

我有表格标题的问题。如何删除此白色边框或更改它的颜色？ 我的代码：

jtableheader header = table.getTableHeader();
    header.setBackground(new Color(21,25,28));
    header.setForeground(new Color(255,117,0));
    header.setPreferredSize(new Dimension(10,30));
    header.setBorder(new LineBorder(new Color(21,28),2));

解决方法

你就快到了...

对于标题，您可以：

final DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setBorder(null);
header.setDefaultRenderer(renderer);

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如果您还想从数据单元格中删除边框（实际上是删除网格），请调用：

table.setShowGrid(false);

---

这是一个没有任何边框的 JTable 的组装示例（除非用户选择一个单元格，然后会在它周围临时出现一个边框）：

import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;

public class Main {
    
    private static void createAndShowGUI() {
        final JFrame frame = new JFrame("Table without borders");
    
        final JTable table = new JTable(new Object[][]{
            new Object[]{"user","user","user"},new Object[]{"user","user"}
        },new Object[]{"A","B","C"});
        
        JTableHeader header = table.getTableHeader();
        
        final Color dark = new Color(21,25,28),orange = new Color(255,117,0);
        table.setForeground(orange);
        table.setBackground(dark);
        header.setBackground(dark);
        header.setForeground(orange);
        
        final DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
        renderer.setBorder(null); //Remove border from the renderer (which is just a JLabel)...

        //Apply the renderer to all header cells and all data cells:
        header.setDefaultRenderer(renderer);
        table.setDefaultRenderer(Object.class,renderer);
        
        /*The follwing lines simply remove the border from the cell editor
        (ie the component which draws each cell when the user edits its value):*/
        //final JTextField editor = new JTextField();
        //editor.setBorder(null);
        //table.setCellEditor(new DefaultCellEditor(editor));
        
        //header.setBorder(null); //Not needed.
        
        table.setShowGrid(false); //Hide the grid (which is some extra border between cells).
        
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(new JScrollPane(table));
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    
    public static void main(final String[] args) {
        SwingUtilities.invokeLater(Main::createAndShowGUI);
    }
}