show input dialog box after error message dialog box
Question
I need to display an input dialog box and enter the player's name.
If the player clicked the ok button and the value of the input dialog is either a number or null an error should be displayed. If the player clicks the ok button of the error message dialog box, the input box will appear again.
I don't know if my code is wrong. I forgot how to code in java because of my web programming subject.
int[] player = new int[1];
for(int a =0; a<player.length; a++){
String input = JOptionPane.showInputDialog("Enter your Name:",JOptionPane.OK_CANCEL_OPTION);
try {
if(!input.matches("[a-zA-Z]+")){
JOptionPane.showMessageDialog(null,"Use Letters only", "Warning", JOptionPane.OK_OPTION);
} else {
input = String.valueOf(player[a]);
category c = new category();
this.dispose();
c.show();
}
}
catch(Exception e){
};
2 answers
solution1
3 ACCPTED 2015-12-21 08:31:42
If you do the loop right, you'll need only one dialog :
String message = "Enter Your Name:";
String playerName = null;
do {
playerName =
JOptionPane.showInputDialog(message);
message = "<html><b style='color:red'>Enter Your Name:</b><br>"
+ "Use letters only.";
} while(playerName != null && !playerName.matches("[a-zA-Z]+"));
System.out.println("PlayerName: " + playerName);
This will include the error message into the next iteration of asking for a valid name. Makes it a bit nicer to work with as well.
Shows like this on first call:
and like this in case of errors:
Note
You might want to change your regex to "[a-zA-Z]\\\\w+" if numbers later on in the name are okay (for instance "bunny99" )
solution2
0
Show an error dialog that displays the message, 'alert':
JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);
Show an internal information dialog with the message, 'information':
JOptionPane.showInternalMessageDialog(frame, "information", "information", JOptionPane.INFORMATION_MESSAGE);
Show an information panel with the options yes/no and message 'choose one':
JOptionPane.showConfirmDialog(null,"choose one", "choose one", JOptionPane.YES_NO_OPTION);
Show an internal information dialog with the options yes/no/cancel and message 'please choose one' and title information:
JOptionPane.showInternalConfirmDialog(frame, "please choose one", "information",JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);
Show a warning dialog with the options OK, CANCEL, title 'Warning', and message 'Click OK to continue':
Object[] options = { "OK", "CANCEL" };
JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,null, options, options[0]);
Show a dialog asking the user to type in a String:
String inputValue = JOptionPane.showInputDialog("Please input a value");
Show a dialog asking the user to select a String:
Object[] possibleValues = { "First", "Second", "Third" };
Object selectedValue = JOptionPane.showInputDialog(null,"Choose one", "Input",JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues[0]);
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