相关疑难解决方法(0)

我正在尝试在工具栏中添加一个图标,但最好放在哪个位置？我的桌面或应该在项目文件中创建一个新文件或添加所有图片,因为它没有显示,这是我的代码:

 JToolBar toolBar = new JToolBar();
     String[] iconFiles = {"pen-icon","",""};
     String[] buttonLabels = {"New","Open","Save"};
     icon = new ImageIcon[iconFiles.length];
     Obutton = new JButton[buttonLabels.length];

     for (int i = 0; i < buttonLabels.length; ++i) {
      icon[i] = new ImageIcon(iconFiles[i]);
      Obutton[i] = new JButton(icon[i]);
      Obutton[i].setToolTipText(buttonLabels[i]);
      if (i == 3)
        toolBar.addSeparator();
         toolBar.add(Obutton[i]);
    }