列名未显示在JTable中

Question

我正在尝试设计JTable但是列名没有显示我不知道为什么数组被声明可以有人看看这段代码表= new JTable(data,columnNames); 我试着看看java教程,但我现在没有发现它

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,您已将表添加到内容窗格.这有效地将其从滚动窗格中移除,滚动窗格负责显示表列标题.

删除以下行

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