更新JTable中的数据 [英] Updating Data in a JTable

问题描述

说我有一张桌子.其中一个单元格保存一个JLabel.如果更改JLabel的文本，如何获取JTable来显示更改? 看下面的代码，我应该怎么做才能显示对JLabel的更改?

Lets say I have a table. One of the cells holds a JLabel. If I change the text of the JLabel how do I get the JTable to show the change? Look at the following code, what should I change to make it show the changes to the JLabel?

public class ActivTimerFrame extends JFrame implements ActionListener{
    //Data for table and Combo Box
    String timePlay =  "1 Hour";
    String timeDev = "2 Hours";
    String[] comboChoices = {"Play Time", "Dev Time"};
    String[] columnNames = {"Activity", "Time Allowed", "Time Left"};
    Object[][] data = {{"Play Time", "1 Hour", timePlay }, {"Dev Time", "2 Hours", timeDev }};
    //This is where the UI stuff is...
    JTable table = new JTable(data, columnNames);
    JScrollPane scrollPane = new JScrollPane(table);
    JPanel mainPanel = new JPanel();
    JComboBox comboBox = new JComboBox(comboChoices);
    JButton start = new JButton("Start");
    JButton stop = new JButton("Stop");



    public ActivTimerFrame() {
        super("Activity Timer");
        setSize(655, 255);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        setResizable(false);
        GridLayout layout = new GridLayout(2,1);
        setLayout(layout);
        add(scrollPane);
        stop.setEnabled(false);
        start.addActionListener(this);
        mainPanel.add(comboBox);
        mainPanel.add(start);
        mainPanel.add(stop);

        add(mainPanel);
    }



    @Override
    public void actionPerformed(ActionEvent evt) {
        Object source = evt.getSource();
        if(source == start) {
            timePlay ="It Works";


        }

    }



}

推荐答案

您可以

table.getModel().setValueAt(cellValueObject, rowIndex, colIndex);

设置特定的单元格.

在您尝试的情况下，您可以做

in you case for what you are trying, you can do

        timePlay ="It Works";
        table.getModel().setValueAt(timePlay, 0, 1);

这篇关于更新JTable中的数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！