parseint « Integer « Java Data Type Q&A





1. How does Integer.parseInt(string) actually work?    stackoverflow.com

Was asked this question recently and did not know the answer. From a high level can someone explain how Java takes a character / String and convert it into an int. Many ...

2. need help with parseInt    stackoverflow.com

how can i get for example the integer codeInt=082 from String code='A082' i have tried this:

int codeInt = Integer.parseInt(code.substring(1,4));
and i get codeInt=82 ,it leaves the first 0 but i want the full ...

3. Strange Integer.parseInt exception    stackoverflow.com

Exception in thread "Thread-2" java.lang.NumberFormatException: For input string: "3"
 int test = Integer.parseInt(result[0]);
This is the error I keep getting when I'm trying to convert "3" to an ...

4. Beginner Java Question about Integer.parseInt() and casting    stackoverflow.com

so when casting like in the statement below :-

int randomNumber=(int) (Math.random()*5)
it causes the random no. generated to get converted into an int.. Also there's this method I just came across Integer.parseInt() which ...

5. Java: parse int value from a char    stackoverflow.com

I just want to know if there's a better solution to parse a number from a character in a string (assuming that we know that the character at index n is ...

6. Java Beginner Having Trouble Using Integer.parseInt for Converting a String into an integer    stackoverflow.com

I am creating a batch program that reads an external input file that contains credit card numbers and then sums the digits(from right to left), starting at the last digit and skipping every ...

7. NumberFormatException error (parseInt    stackoverflow.com

Hopefully a very simple query, but it's left me scratching my head. I have a string, which is just a single integer, and I'm trying to then get that integer out as ...

8. Integer.parseInt , eror for java lang numberformat Exception    stackoverflow.com

static byte[] stringKeByteA(String st) {
     int lenAsli = st.length();
     st = st + "11111111";
     byte[] hs = new byte[(lenAsli ...

9. Java Integer parseInt error    stackoverflow.com

I have following problem: I want to convert some Binary Strings to an integer:

eargb = Integer.parseInt(al + re + gre + blu, 2);
but I get following exception. Why?
java.lang.NumberFormatException: For input string: "11111111111000101000100111111010"
...





10. Diagnosing Integer.parseInt() Error    stackoverflow.com

I am reading in pipe delimitated text in from a flat file and am having an error parsing the text. I am an old Java hand but I haven't touched it ...

11. Java Integer.parseInt failed to parse a string    stackoverflow.com

I'm parsing a string of 15 digits like this:

String str = "100004159312045";
int i = Integer.parseInt(str);
I'm getting an exception when doing so. Why? What are the limitations for Integer.parseInt? What other options do ...

12. Integer.parseInt()    coderanch.com

> In case if i validate the string and find out that it is not in the desired format then what should be done? Return null or throw a custom exception? That depends on your application. Is it text that a user entered in a GUI? In that case, you might want to display a message to the user that (s)he ...

13. Overloded parseInt(String, int)?    coderanch.com

Ahmer The int argument is the radix that the String integer is in. In other words its base. A String such as "12349" would be base 10 so the parseInt call would be parseInt("12349", 10); . A String that is a hex representation could be something like "AF", so parseInt would be parseInt("AF", 16);. Basicaly your telling the method that this ...

14. compiler error -- Integer.parseInt    coderanch.com

I am working (still) on my numerology program. I am almost done, but am having trouble with the reduce_num method. What I did was just return the number if it was < 9. If it is > 9, I tried to reduce it by converting it to a String, then using a loop to divide up the different parts of the ...

15. Integer.parseInt("+000000");    coderanch.com

I will now teach you how to fish my lad First, you have the source code to all the java classes. It's in a jar file called src.jar, in your jdk folder. Open it up and take a look at the Integer class, then scroll down to the parse() method. You'll see that parse(String) calls parse(String, int). Looking at this method, ...

16. Integer.parseInt : NumberFormatException    coderanch.com

hmm only things I can think of is to check the length and make sure you don't have any extra spaces in there. ALso, try printing it out to your console right before you try to parse it to be sure it really is the value you expect. My guess is that your string isn't what you think it is. You ...





17. Integer.parseInt    coderanch.com

I am attempting to add the first and second char of the first argument passed to the app. Here is my code: public class test { public static void main(String[] args) { int firstDigit = Integer.parseInt(args[0].charAt(0)); int secondDigit = Integer.parseInt(args[0].charAt(1)); int total = firstDigit + secondDigit; System.out.println(String.valueOf(total)); } } And I get this error msg: test.java:3: cannot resolve symbol symbol : ...

18. Integer.parseInt() vs String concatenation    coderanch.com

The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ...

19. Head First Java - Dot com game, Query on Integer.parseInt    coderanch.com

Hi, I am new to Java and trying to learn java from Head First book chapter 5, In this book code has written to create simple dotcom game. Basically it is doing following 1. Create grid of simple array 2. Assign 3 continous locations in a array 3. Accept guess from user 4. If location allocated = guess then give message ...

21. Integer.parseInt("5.843"); Error    java-forums.org

22. Integer.parseInt() error    java-forums.org

23. Working with Integer parseInt(String)    java-forums.org

24. Integer parseInt(str) question    java-forums.org

parseInt question: I have a string - "00000000030001". This is a dollar value from a file. So I need to store last 2 digits as CENTS and rest of the digits as DOLLAR. Integer.parseInt works fine for dollar as 000000000300 but it returns 1 for cents instead of 01. How can I have the code return 01 for cents value. Here ...

25. Problem with statement "Integer.parseInt(args[0]);    java-forums.org

See below. Below the class is the error message at running. I use Netbeans. Saving the class goes ok. But at running it gives the error message. The problem seems to be at the statement "int peter3 = Integer.parseInt(agrs[0]);" class PeterTry1 { public static void main(String[] args) { String peter1 = "p"; System.out.println(peter1); int peter3 = Integer.parseInt(args[0]); float peter4 = peter3; ...

27. How do I convert a string to an int without using parseInt ?    forums.oracle.com

Hi all, Hope one of you can help me I've got to design a function that take a string input of an int and transpose the value to an int variable. I'm not allowed use paeseInt etc I've got to hand code it. e.g. have to turn String Snum ="-41" to Int Num = -41. Am I right in guessing that ...

28. help understanding Integer.parseInt(String something)?    forums.oracle.com

Does anyone know why I get this error when I try to put duke stars to the question: Server Error This server has encountered an internal error which prevents it from fulfilling your request. The most likely cause is a misconfiguration. Please ask the administrator to look for messages in the server's error log.

29. Integer:parseInt()    forums.oracle.com

30. parseInt integer too big    forums.oracle.com

Hello, In my application I have a form field which a non-negative number should be entered in. In order to make my application maximally user-friendly, I validate that field if it has a value entered, if the value entered is a number and if the number entered is negative. I validate the string with a Integer.parseInt() method. If it throws a ...

32. Correct/Incorrect? Integer i = Integer.parseInt("23", 8);    forums.oracle.com

The book is called "Introduction to Java Programming: Comprehensive Version, 6th Ed." , Chapter 10, Review Question 10.12. If you type the name of the book in google and go to the site, it has all the solutions for the review questions. I found one wrong answer in that review question as well. Thanks.

33. Bug in Java 5 Integer.parseInt (stringValue, radix) ?    forums.oracle.com

The important thing is to cast the int to a long before performing your 64-bit operations. The high dword needs to shifted left 32 bits, but this only works on a long. The low dword needs to have the sign-extended bits masked off, but only after it has been cast to a long and the sign-extension performed.

34. Integer.parseInt("2j",19)    forums.oracle.com

I'm trying to convert between bases (specifically from any base to base ten, which parseInt should do), and int x = Integer.parseInt("2j",19); gives me an error, however: int x = Integer.parseInt("1db7",14); works perfectly and spits out the base 10 value. Any ideas how I can get the correct value of 2j base 19 to work in java? (the value as given ...