5

我是一名初级程序员，正在构建一个带有按钮和滚动条的简单窗口。当我编译我的代码时，我的按钮上的文本被省略号切断，并且图像图标不显示。我已经尝试在 eclipse 和 NetBeans 中编译它。为了解决我尝试过的问题

.setMargin(new Insets(0, 0, 0, 0));

.setPreferedSize

adding padding (I forgot the code for this)

.setBounds

以及我在互联网上偶然发现的几乎所有其他内容。这些都没有解决我的问题，我无法查看按钮中的文本和图像。

我的代码：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*; 

public class FeedBar2 extends JFrame {

    public FeedBar2() {
        super("FeedBar 2");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // create icons
        ImageIcon loadIcon = new ImageIcon("load.gif");
        ImageIcon saveIcon = new ImageIcon("save.gif");
        ImageIcon subscribeIcon = new ImageIcon("subscribe.gif");
        ImageIcon unsubscribeIcon = new ImageIcon("unsubscribe.gif");
        // create buttons
        JButton load = new JButton("Load", loadIcon);
        JButton save = new JButton("Save", saveIcon);
        JButton subscribe = new JButton("Subscribe", subscribeIcon);
        JButton unsubscribe = new JButton("Unsubscribe", unsubscribeIcon);
        // add buttons to toolbar
        JToolBar bar = new JToolBar();
        bar.add(load);
        bar.add(save);
        bar.add(subscribe);
        bar.add(unsubscribe);
        // create menu
        JMenuItem j1 = new JMenuItem("Load");
        JMenuItem j2 = new JMenuItem("Save");
        JMenuItem j3 = new JMenuItem("Subscribe");
        JMenuItem j4 = new JMenuItem("Unsubscribe");
        JMenuBar menubar = new JMenuBar();   
        JMenu menu = new JMenu("Feeds");
        menu.add(j1);
        menu.add(j2);
        menu.addSeparator();
        menu.add(j3);
        menu.add(j4);
        menubar.add(menu);
        // prepare user interface
        JTextArea edit = new JTextArea(8, 40);
        JScrollPane scroll = new JScrollPane(edit);
        BorderLayout bord = new BorderLayout();
        setLayout(bord);
        add("North", bar);
        add("Center", scroll);
        setJMenuBar(menubar);
        pack();
        setVisible(true);
    }

    public static void main(String[] arguments) {
        FeedBar2 frame = new FeedBar2();
    }
}
4

2 回答 2

4

您的图像位置一定有问题，因为这很好用（使用 URL 图像）：

import java.awt.BorderLayout;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolBar;

public class FeedBar2 extends JFrame {

    public FeedBar2() {
        super("FeedBar 2");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // create icons
        ImageIcon loadIcon = null;
        try {
            loadIcon = new ImageIcon(new URL("http://t0.gstatic.com/images?q=tbn:ANd9GcRQgmCgdCMtXO6db7pX4UwzdvJY9-r8kI2zwE5A6c3VqB9eOR2Pe8gpqQBdeg"));
        } catch (MalformedURLException ex) {
            Logger.getLogger(FeedBar.class.getName()).log(Level.SEVERE, null, ex);
        }
        // create buttons
        JButton load = new JButton("load", loadIcon);
        // add buttons to toolbar
        JToolBar bar = new JToolBar();
        bar.add(load);
        BorderLayout bord = new BorderLayout();
        setLayout(bord);
        add("North", bar);
        pack();
        setVisible(true);
    }

    public static void main(String[] arguments) {
        FeedBar2 frame = new FeedBar2();
    }
}

那么图片是否与jar位于同一目录中（在netbeans中它们可以位于主项目目录中）？如果它们位于 jar 中，则需要使用以下方法提取它们：getResourceAsStream使用正确的包路径，其中包含相对于当前包的图像。

我建议总是用你的罐子打包你的图像，更少的问题（在netbeans上这样做只需将图像拖放到你当前的类包中，然后简单地使用确切的名称（区分大小写）来检索它使用这getResourceAsStream

于 2012-08-10T16:37:38.880 回答
4
  • 你的意思是

在此处输入图像描述

从代码

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

public class FeedBar2 extends JFrame {

    private static final long serialVersionUID = 1L;
    private Icon loadIcon = UIManager.getIcon("OptionPane.errorIcon");
    private Icon saveIcon = UIManager.getIcon("OptionPane.informationIcon");
    private Icon subscribeIcon = UIManager.getIcon("OptionPane.warningIcon");
    private Icon unsubscribeIcon = UIManager.getIcon("OptionPane.questionIcon");

    public FeedBar2() {
        super("FeedBar 2");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // create icons
        /*ImageIcon loadIcon = new ImageIcon("load.gif");
        ImageIcon saveIcon = new ImageIcon("save.gif");
        ImageIcon subscribeIcon = new ImageIcon("subscribe.gif");
        ImageIcon unsubscribeIcon = new ImageIcon("unsubscribe.gif");*/
        // create buttons
        JButton load = new JButton("Load", loadIcon);
        JButton save = new JButton("Save", saveIcon);
        JButton subscribe = new JButton("Subscribe", subscribeIcon);
        JButton unsubscribe = new JButton("Unsubscribe", unsubscribeIcon);
        // add buttons to toolbar
        JToolBar bar = new JToolBar();
        bar.add(load);
        bar.add(save);
        bar.add(subscribe);
        bar.add(unsubscribe);
        // create menu
        JMenuItem j1 = new JMenuItem("Load");
        JMenuItem j2 = new JMenuItem("Save");
        JMenuItem j3 = new JMenuItem("Subscribe");
        JMenuItem j4 = new JMenuItem("Unsubscribe");
        JMenuBar menubar = new JMenuBar();
        JMenu menu = new JMenu("Feeds");
        menu.add(j1);
        menu.add(j2);
        menu.addSeparator();
        menu.add(j3);
        menu.add(j4);
        menubar.add(menu);
        // prepare user interface
        JTextArea edit = new JTextArea(8, 40);
        JScrollPane scroll = new JScrollPane(edit);
        BorderLayout bord = new BorderLayout();
        setLayout(bord);
        add("North", bar);
        add("Center", scroll);
        setJMenuBar(menubar);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public static void main(String[] arguments) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                FeedBar2 frame = new FeedBar2();
            }
        });
    }
}
于 2012-08-10T16:53:18.713 回答