Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


Tip of the Day
Language: Java
Expertise: Beginner
Sep 11, 1998

Converting a String into an int

The Java core API possesses a method equivalent to the C atoi() function in Java. The java.lang.Integer class contains a method called parseInt() which will convert a String into an int. The Float, Double, and Long classes also contain analogous methods to convert strings into numbers. They also contain toString() methods to perform the conversion of numbers into strings. The following program will take two arguments, add them, and print the result:
 
public final class ParseIntExample {

  public static final void main(String[] args) {
    int num1, num2, sum;

    if(args.length != 2) {
      System.err.println("Usage: ParseIntExample  ");
      return;
    }

    try {
      num1 = Integer.parseInt(args[0]);
      num2 = Integer.parseInt(args[1]);
    } catch(NumberFormatException e) {
      System.err.println("You must provide two 
  
integer arguments."); return; } sum = num1 + num2; System.out.println(num1 + " + " + num2 + " = " + sum); } }
Daniel Savarese
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date