Member Avatar for ryathegr8

slaamz guls and guys!

can any body tell ,how to validate input to check whether it in Integer only?? it shouldnot be in Double, Long and float in type..... i am writting simple code for simple calculator.... plz reply me fast if any body knows...

regards
m0m0

  • 2 Contributors
  • 3 Replies
  • 70 Views
  • 6 Hours Discussion Span
  • Latest Post Latest Post by javaAddict

Recommended Answers

All 3 Replies

Member Avatar for javaAddict

You can call the Integer.parseInt(String) method and if it throws an exception then it is not an int.

Member Avatar for ryathegr8

thank you ...i have done it before....as

st1=JOptionPane.showInputDialog("Enter Value for 'x'");
       st2=JOptionPane.showInputDialog("Enter Value for 'y'");

      int x= Integer.parseInt(st1);
      int y= Integer.parseInt(st2);

        int sum = x+y;

       JOptionPane.showMessageDialog(null,"Sum of x and y is" +sum);

it throws exception as well. but i want to throw my own exception.

Edited by peter_budo because: Correcting closing tag
Member Avatar for javaAddict

Do you know how to use try-catch?

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.