这可能看起来很琐碎,但我无法弄清楚如何让此对话框中的密码框获得焦点。
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
public class PasswordBox {
@SuppressWarnings("unused")
public String prompt() {
JPasswordField pass = new JPasswordField(10);
int action = JOptionPane.showConfirmDialog(null, pass,"Enter Password",JOptionPane.OK_CANCEL_OPTION);
return new String(pass.getPassword());
}
}
我可以这样从其他类中调用它:String tmpPASS = new PasswordBox().prompt();
但出现了一个问题,当对话框弹出时,“确定”按钮会获得焦点。
堆栈跟踪(请参见Eng.Fouad的答案):
at javax.swing.JComponent.addNotify(Unknown Source)
at PasswordBox$1.addNotify(PasswordBox.java:14)
at java.awt.Container.addNotify(Unknown Source)