我正在做一个Java(包括GUI)客户端/服务器程序。 我有在客户端下面的代码: public class SBListener implements ActionListener{
public void actionPerformed(ActionEvent e){
try{
outToServer.writeUTF(usn.getText().trim());
我在JFrame上加JLabel并在YES按钮上点击显示框JOptionPane,它显示框架但没有显示标签文字。 int yes = JOptionPane.showConfirmDialog(null,"Do you want to reactivate previous
schedule(s)","Reactivate Schedule",JOptionPane.OK_CANCEL
public class ListExample {
public static void main(String[] args) {
final List l=new List();
l.init();
SwingUtilities.invokeLater(new Runnable() {
@Override
public