need guidness in java code

by sharmila farooqi Sun May 29, 2011 5:00 pm

sir plzz help mee!
my question about if user enter wrong input like enter text instead of number then out catch block will be executes and message appear what we type but sir i want to know how can i again get input or show the message again until user enter correct entry, like
String total=JOptionPane.showInputDialog("Enter total number");
try{
float i=Float.ParseFloat(total);//if exception catch block executes
}
catch(NumberFormatException nfe{
JOptionPane.showMessageDialoge("enter correct format");
}

by Vuhelper Sun May 29, 2011 5:01 pm

Following code explains how you can take input from user again and again. You can modify logic according to your need.

Code:: import javax.swing.JOptionPane; public class AgainInput { public static void main(String[] args){ float input = -1 ; while(input == -1){ input = takeInput(); } } public static float takeInput(){ float i; String total=JOptionPane.showInputDialog("Enter total number"); try{ i=Float.parseFloat(total);//if exception catch block executes return i; } catch(NumberFormatException nfe){ JOptionPane.showMessageDialog(null,"enter correct format"); return -1; } } }

need guidness in java code

need guidness in java code

Re: need guidness in java code