invalid input

[ashley sands]

in my program, i want the user to enter an integer. if they enter a double or character, i don't want the program to crash. i want it to go into a while loop that keeps running until they enter an integer.
i have no idea how to get the program to keep running when the input is invalid... can someone help?

[marc weber]

Originally posted by ashley sands:
...i want it to go into a while loop that keeps running until they enter an integer. i have no idea how to get the program to keep running when the input is invalid...

Welcome to JavaRanch!

It sounds like you do have an idea: "go into a while loop that keeps running until they enter an integer." That suggests something like this...

int input;
boolean inputIsInt = false;
while(!inputIsInt) {
  //ask user for input
  //get user input
  //test input
  //if input is valid, set inputIsInt to true
}

So the questions are how do you get the input and how do you test the input to see if it's an int? What have you tried so far?
[ February 22, 2007: Message edited by: marc weber ]

[ashley sands]

i know how to get input and form the while loop and all of that, i just don't know how to test if it's an integer...

[Herman Schelti]

hi Ashley,

Just look at the Javadocs of the Integer class.

Herman