How Do I Say *This* In Java?

[zythyl]

How do I say

if the variable called "example" does not equal an integer
DO
System.out.println("wrong");
ELSE
Do nothing;

I know that I shouldn't put an else in at all, but what about the IF statement?

and how do i say someting in a loop but one part of the sentence changes each time? like saying "you have entered the number for box 1" then after entering another integer it says "you have entered the number for box 2"?

thanks!

[sukatoa]

it would be nice if you try to design a method that has a parameter "String" and will return a boolean that represents true if the value receive is an integer or false otherwise.

What came first on mind is to put them on try/catch block.

Code:

boolean isInteger(String test){
     try{
          Integer.parseInt(test);
          return true;
     }catch(Exception e){
          return false;
     }
}

then invoke that method like

Code:

if(isInteger("7852862"))
     do something;
else
     jump;

[sukatoa]

Quote:

and how do i say someting in a loop but one part of the sentence changes each time? like saying "you have entered the number for box 1" then after entering another integer it says "you have entered the number for box 2"?

Pseudocode,

Code:

while( allowed ){
      var = user's input
      if(isInteger(var))
            System.out.printf("You've entered %s \n",var);
      else
            set not allowed;
}