[英]Using Java's JOptionPane
我正在尝试使用Java的JOptionnPane模块。 这是代码:
Object[] options = {"OK", "Cancel"};
JOptionPane.showInternalOptionDialog(null, "Your choice", "Division", JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE, null, options, options[0]);
error: JOptionPane: parentComponent does not have a valid parent at...
JOptionPane.showInternalInputDialog仅与JDesktopPane / JInternalFrames实例一起使用。
final JDesktopPane deskpane = new JDesktopPane();
...
String str=JOptionPane.showInternalInputDialog(deskpane, "Enter value");
如果不与上述两个组件中的任何一个一起使用,它将不会产生正确的输出,实际上,它将引发运行时异常:
java.lang.RuntimeException: JOptionPane: parentComponent does not have a valid pa
讨论用户参数,其值或其顺序不正确的异常,
import java.awt.EventQueue;
import javax.swing.Icon;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
public class MyOptionPane {
public MyOptionPane() {
Icon errorIcon = UIManager.getIcon("OptionPane.errorIcon");
Object[] possibilities = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};
Integer i = (Integer) JOptionPane.showOptionDialog(null,
null, "ShowInputDialog",
JOptionPane.PLAIN_MESSAGE,1, errorIcon, possibilities, 0);
Integer ii = (Integer) JOptionPane.showInputDialog(null,
"Select number:\n\from JComboBox", "ShowInputDialog",
JOptionPane.PLAIN_MESSAGE, errorIcon, possibilities, "Numbers");
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
MyOptionPane mOP = new MyOptionPane();
}
});
}
}
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