Integer.ValueOf(line,16) converts string value line into an Integer object. In this case radix is 16.
intValue() gets the int value from the Integer object created above.
Furthermore, above two steps are equivalent to Integer.parseInt(line,16).
In order to get more INFO please refer Java API Documentation of Integer class.
Answer from Upul Bandara on Stack OverflowCoderanch
coderanch.com › t › 400120 › java › Integer-decode-valueOf
Integer decode() vs. valueOf() (Beginning Java forum at Coderanch)
July 4, 2005 - The single parameter version of the valueOf() method only interprets strings representing signed decimal integers. For the decode() method, you pass radix specifiers such as "0x" or "#" for hex strings and "0" for octal strings. The two parameter version of the valueOf() method is more flexible in that it can interpret strings represented in many different bases (up to base 36 I think). Look at the following example: ? Lalit, as much as I am happy to help you out here, the brief information I supplied above is all available from the Java API javadocs.
Tutorialspoint
tutorialspoint.com › java › lang › integer_valueof_string.htm
Java - Integer valueOf(String s) method
The Java Integer valueOf(String s) method returns an Integer object holding the value of the specified String s.
Videos
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java - What is "Integer.valueOf().intValue()" supposed to do? - Stack Overflow
I assume you mean Integer.valueOf, btw - lower case V. More on stackoverflow.com
Whats the point of using Integer.valueOf(scanner.nextLine()); ?
Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://imgur.com/a/fgoFFis ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
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November 24, 2020int value = Integer.valueOf(scanner.nextLine()); Vs Int value = scanner.nextInt();
scanner.nextInt() will leave a '\n' after you press Enter. so if you use a nextLine() after an nextInt(), the nextLine() will read the '\n' and you won't be able to input anything on the console.
More on reddit.com 5
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March 20, 2022Integer.valueOf() and parseint()
Integer.parseInt() returns a primitive. valueOf() returns an Integer object. Call the one that matches the return type you need and avoid autoboxing/unboxing. More on reddit.com
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September 14, 2023Reddit
reddit.com › r/learnjava › integer.valueof() and parseint()
r/learnjava on Reddit: Integer.valueOf() and parseint()
September 14, 2023 -
Hello, i have started learning java recently by mooc. But during this course, it uses Integer.valueOf while taking integer inputs, I use same way but whenever i do it intellij suggests me parseint(). And I wonder if it is better to use parseint?
Top answer 1 of 3
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Integer.parseInt() returns a primitive. valueOf() returns an Integer object. Call the one that matches the return type you need and avoid autoboxing/unboxing.
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Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full - best also formatted as code block You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit/markdown editor: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.
GeeksforGeeks
geeksforgeeks.org › java › integer-valueof-vs-integer-parseint-with-examples
Integer.valueOf() vs Integer.parseInt() with Examples - GeeksforGeeks
July 11, 2025 - // Java program to illustrate the // java.lang.Integer.valueOf(int a) import java.lang.*; public class Geeks { public static void main(String[] args) { Integer obj = new Integer(10); // Returns an Integer instance // representing the specified int value System.out.println("Output Value = " + obj.valueOf(85)); } }
LabEx
labex.io › tutorials › java-java-integer-valueof-string-method-117764
Java | Integer | valueOf | String Conversion | LabEx
In this lab, you will learn how to use the valueOf method to return an Integer object for a given string. To set up your environment for this program, you'll need to follow these steps: ... import java.lang.Integer; import java.util.Scanner; public class ValueOf { public static void main(String[] args) { try { System.out.println("Enter a string to convert to an Integer: "); Scanner sc = new Scanner(System.in); String str = sc.next(); Integer num = Integer.valueOf(str); System.out.println("The Integer value is: " + num); } catch (NumberFormatException e) { System.out.println("Invalid input!
GeeksforGeeks
geeksforgeeks.org › java › integer-valueof-method-in-java
Integer valueOf() Method in Java - GeeksforGeeks
January 23, 2026 - Return Value : The method returns an Integer object holding the value represented by the string argument in the specified base or radix. Example 1: valueOf(String, radix) Java ·
Tutorialspoint
tutorialspoint.com › java › lang › integer_valueof_int.htm
Java - Integer valueOf(int i) method
The Java Integer valueOf(int i) method returns a Integer instance representing the specified int value i.
Tutorialspoint
tutorialspoint.com › java › lang › integer_valueof_string_radix.htm
Java - Integer valueOf(String s, int radix) method
The Java Integer valueOf(String s, int radix) method returns an Integer object holding the value extracted from the specified String s when parsed with the radix given by the second argument radix.
Oracle
docs.oracle.com › javase › 8 › docs › api › java › lang › Integer.html
Integer (Java Platform SE 8 )
October 20, 2025 - The characters in the string must all be decimal digits, except that the first character may be an an ASCII plus sign '+' ('\u002B'). The resulting integer value is returned, exactly as if the argument and the radix 10 were given as arguments to the parseUnsignedInt(java.lang.String, int) method. Parameters: s - a String containing the unsigned int representation to be parsed · Returns: the unsigned integer value represented by the argument in decimal. Throws: NumberFormatException - if the string does not contain a parsable unsigned integer. Since: 1.8 · public static Integer valueOf(String s, int radix) throws NumberFormatException ·
Top answer 1 of 4
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Integer.ValueOf(line,16) converts string value line into an Integer object. In this case radix is 16.
intValue() gets the int value from the Integer object created above.
Furthermore, above two steps are equivalent to Integer.parseInt(line,16).
In order to get more INFO please refer Java API Documentation of Integer class.
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Yes, this is equivalent to:
size = Integer.parseInt(line, 16);
Indeed, looking at the implementation, the existing code is actually implemented as effectively:
size = Integer.valueOf(Integer.parseInt(line, 16)).intValue();
which is clearly pointless.
The assignment to -1 in the previous line is pointless, by the way. It would only be relevant if you could still read the value if an exception were thrown by Integer.parseInt, but as the scope of size is the same block as the call to Integer.valueof, it won't be in scope after an exception anyway.
LabEx
labex.io › tutorials › java-how-to-utilize-the-integer-valueof-method-in-java-414178
How to utilize the Integer.valueOf() method in Java | LabEx
Integer i1 = Integer.valueOf("42"); Integer i2 = Integer.valueOf("42"); System.out.println(i1 == i2); // Output: true · In the above example, since both i1 and i2 are assigned the value 42, which is within the cached range, the method returns the same Integer object for both calls, resulting in improved memory usage and performance. LabEx, a leading provider of Java programming resources, strongly recommends using the Integer.valueOf() method as a best practice when working with integer values in your Java applications.
Microsoft Learn
learn.microsoft.com › en-us › dotnet › api › java.lang.integer.valueof
Integer.ValueOf Method (Java.Lang) | Microsoft Learn
The argument is interpreted as representing a signed decimal integer, exactly as if the argument were given to the #parseInt(java.lang.String) method. The result is an Integer object that represents the integer value specified by the string. In other words, this method returns an Integer object equal to the value of: <blockquote> Integer.valueOf(Integer.parseInt(s))</blockquote>
Reddit
reddit.com › r/javahelp › whats the point of using integer.valueof(scanner.nextline()); ?
r/javahelp on Reddit: Whats the point of using Integer.valueOf(scanner.nextLine()); ?
November 24, 2020 -
I genuinely don't know what the point of using anything other than Scanner variableName = scanner.nextLine(), if they both give the same output
example.
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One results in a String, the other converts the string to an integer. Try entering "Hello" into both examples. One will tell you that you entered the number "Hello", the other will give you an error and crash. Also try calculating with the results, for example modify the code so it prints twice the number.
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take a look at a tutorial on wrapper classes https://www.tutorialspoint.com/why-do-we-need-a-wrapper-class-in-java This basically just allows you to take a string(in number format) and convert to it's primitive integer value so you can do calculations on it.
Quora
quora.com › What-is-the-valueOf-function-in-Java
What is the valueOf() function in Java? - Quora
Answer: valueOf() Method The valueOf method returns the relevant Number Object holding the value of the argument passed. The argument can be a primitive data type, String, etc. This method is a static method.
Oracle
docs.oracle.com › en › java › javase › 21 › docs › api › java.base › java › lang › Integer.html
Integer (Java SE 21 & JDK 21)
January 20, 2026 - Integer.valueOf(val) : result; to avoid the unnecessary allocation of an Integer object when the default value is not needed. ... Returns the integer value of the system property with the specified name. The first argument is treated as the name of a system property.
Baeldung
baeldung.com › home › java › java string › integer.tostring() vs string.valueof() in java
Integer.toString() vs String.valueOf() in Java | Baeldung
April 7, 2025 - * @see java.lang.Integer#toString(int, int) */ public static String valueOf(int i) { return Integer.toString(i); } To understand it better, we’ll see a few examples where we pass signed/unsigned integers as parameters to it to understand integer to string conversion happens: @Test public void whenValidIntIsPassed_thenShouldConvertToValidString() { assertEquals("11", String.valueOf(11)); assertEquals("11", String.valueOf(+11)); assertEquals("-11", String.valueOf(-11)); } To summarize, there are no actual differences between these two methods, but we should understand the following points to avoid confusion.
Coderanch
coderanch.com › t › 392891 › java › Integer-Integer-valueOf
new Integer vs Integer.valueOf (Beginning Java forum at Coderanch)
November 26, 2002 - I ran your code and watched the same trend (where init arg: 1x10^6) 801 741 781 721 841 741 811 752 801 761 811 741 831 741 801 772 801 761 831 741 831 741 821 812 801 761 791 751 831 751 822 771 801 771 811 751 821 751 842 761 811 771 821 761 832 741 841 751 Interestingly, an additional order of magnitude (I first ran 10,000,000 objs by fat finger) shows much more variance, but the same general trend. I wonder why Integer.valueOf would be so much faster than new Integer??
IncludeHelp
includehelp.com › java › integer-class-valueof-method-with-example.aspx
Java - Integer Class valueOf() Method
valueOf (String value, int radix's) method is used to represent an Integer object holding the integer value of the given argument (value) in the radix's given by the second argument.
Medium
medium.com › javarevisited › an-interesting-interview-question-whats-the-difference-among-new-integer-127-integer-valueof-b9e4d936765d
An Interesting Interview Question: What's the Difference ...
January 10, 2025 - Actually, this question involves a subtlety in the creation and caching mechanism of the Integer object in Java. It’s a seemingly basic problem but is easy to overlook. First of all, let’s take a look at a piece of code and then conduct a specific analysis. Integer a = new Integer("127"); Integer b = new Integer("127"); System.out.println(a == b); // false Integer c = Integer.valueOf("127"); Integer d = Integer.valueOf("127"); System.out.println(c == d); // true Integer e = Integer.valueOf("128"); Integer f = Integer.valueOf("128"); System.out.println(e == f); // false
Reddit
reddit.com › r/learnjava › int value = integer.valueof(scanner.nextline()); vs int value = scanner.nextint();
r/learnjava on Reddit: int value = Integer.valueOf(scanner.nextLine()); Vs Int value = scanner.nextInt();
March 20, 2022 -
hello, I'm learning Java through Mooc and I also use other learning sources as a complement, I realized that data entry for variables is taught in two different ways two examples of integer-type inputs:
int value = Integer.valueOf(scanner.nextLine());
vs
int value = scanner.nextInt();
Can both be used together? which one is the best? what is the difference between both?
Top answer 1 of 5
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scanner.nextInt() will leave a '\n' after you press Enter. so if you use a nextLine() after an nextInt(), the nextLine() will read the '\n' and you won't be able to input anything on the console.
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Read: The Scanner class and its caveats from the r/javahelp wiki.
In short, the combination of .nextInt and .nextLine is problematic without proper knowledge of the internal workings of Scanner.
Especially for the MOOC use only their way. They have checking for that implemented.