资 源 简 介
swing 用户登录界面boolean selected = this.student1.isSelected();
String userName = username.getText();
String password = passwordFild.getText();
if (selected) {
if (userName.length() == 0 || userName == null) {
JOptionPane.showMessageDialog(null, "请输入学号！");
username.grabFocus();
return;
} else if (password.length() == 0 || password == null) {
JOptionPane.showMessageDialog(null, "请输入密码！");
passwordFild.grabFocus();
return;
} else {
try {
