java - 列名未显示在 JTable 中

Question

我正在尝试设计 JTable，但列名称没有显示，我不知道为什么要声明数组，有人可以看一下这段代码table = new JTable(data, columnNames); 我试图查看 java 教程，但现在找不到它

package AnimeAid;

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


    /**
     *
     * @author isslam
     */
    public class GuiInterface extends JFrame {
        JTable table;

         public static void main(String[] args) {
         GuiInterface is = new GuiInterface("t");
         is.setVisible(true);
         }

        public GuiInterface(String title){
        setSize(900, 700);
        setTitle(title);
        setDefaultCloseOperation(GuiInterface.EXIT_ON_CLOSE);
        String[] columnNames = {"#","Start","End","Translation column"};
        Object[][] data = {
        {"1", "00:00:01,600","00:00:04,080", "Mr Magnussen, please state your\n" +
        "full name for the record."},
        {"2", "00:00:04,080 ","00:00:07,040","Charles Augustus Magnussen."}};

        table = new JTable(data, columnNames);
        table.setFillsViewportHeight(true);
        table.setAutoResizeMode( JTable.AUTO_RESIZE_ALL_COLUMNS );
            TableColumn columnA = table.getColumn("#");
            columnA.setMinWidth(10);
            columnA.setMaxWidth(20);
            TableColumn columnB= table.getColumn("Start");
            columnB.setMinWidth(80);
            columnB.setMaxWidth(90);

            TableColumn columnC= table.getColumn("End");
            columnC.setMinWidth(80);
            columnC.setMaxWidth(90);


        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);


        //contaner part
        Container cp = getContentPane();
        cp.add(table);



        }}

Answer 1

问题是，您已将表格添加到内容 Pane 中。这有效地将其从负责显示表格列标题的滚动 Pane 中删除。

删除以下行

    Container cp = getContentPane();
    cp.add(table);