SuperVCD管理系统 完整代码,带各种注释,可以拿这个项目入门。

exitButton.addActionListener(new ExitActionListener());

categoryComboBox.addItemListener(new GoItemListener());

musicListBox.addListSelectionListener(new MusicListSelectionListener());

detailsButton.setEnabled(false);

clearButton.setEnabled(false);

}

catch (IOException exc) {

JOptionPane.showMessageDialog(this, "网络问题 " + exc, "网络问题", JOptionPane.ERROR_MESSAGE);

System.exit(1);

}

}

protected void populateListBox() {

try {

String category = (String) categoryComboBox.getSelectedItem();

if (! category.startsWith("---")) {

musicArrayList = myDataClient.getRecordings(category);

}

else {

musicArrayList = new ArrayList();

}

Object[] theData = musicArrayList.toArray();

musicListBox.setListData(theData);

if (musicArrayList.size() > 0) {

clearButton.setEnabled(true);

}

else {

clearButton.setEnabled(false);

}

}

catch (IOException exc) {

JOptionPane.showMessageDialog(this, "网络问题: " + exc, "网络问题", JOptionPane.ERROR_MESSAGE);

System.exit(1);

}

}