What is the radix parameter in Java, and how does it work?

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I understand that radix for the function Integer.parseInt() is the base to convert the string into. Shouldn't 11 base 10 converted with a radix/base 16 be a B instead of 17?

The following code prints 17 according to the textbook:

public class Test {
  public static void main(String[] args) {
    System.out.println( Integer.parseInt("11", 16) );
  }
}

When you perform the ParseInt operation with the radix, the 11 base 16 is parsed as 17, which is a simple value. It is then printed as radix 10.

You want:

System.out.println(Integer.toString(11, 16));

This takes the decimal value 11(not having a base at the moment, like having "eleven" watermelons(one more than the number of fingers a person has)) and prints it with radix 16, resulting in B.

When we take an int value it's stored as base 2 within the computer's physical memory (in nearly all cases) but this is irrelevant since the parse and tostring conversions work with an arbitrary radix (10 by default).

What is the radix parameter in Java, and how does it work?, When you perform the ParseInt operation with the radix, the 11 base 16 is parsed as 17, which is a simple value. It is then printed as radix 10. Parameter. This method does not accept any parameter. Returns. The radix() method reurns the default radix of this Scanner.. Exceptions. NA. Compatibility Version. Java 1.5 and above

It's actually taking 11 in hex and converting it to decimal. So for example if you had the same code but with "A" in the string, it would output 10.

How to use Integer.parseInt(String,Radix) in JAVA, Such as MySQL, Core Java, HTML, CSS and JQuery and More. Integer.​parseInt(String,radix) method is used to parse integer from binary, octal or hexa decimal numbers. 13 - It means string can contains 0-9 (10) and A,B and C. Integer. How to pass multiple dynamic parameters with Jquery click event handler. What is the radix parameter in Java, and how does it work? 5 answers In java when I was working on Netbeans Ide I saw method of nextInt(int radix). I tried to implement this and passed an integer number, but that gave an exception of InputMismatchException .

Here,

public class Test {
      public static void main(String[] args) {
      System.out.println(Integer.parseInt("11", 16));
    }
}

11 is 16 based number and should be converted at 10 i.e decimal.

 So, integer of (11)16 = 1*16^1 +1*16^0 = 16+1 = 17

Java.lang.Integer.parseInt(String s, int radix) Method, parseInt(String s, int radix) method parses the string argument s as a signed integer in the radix specified by the second argument radix.Some examples can be  Integer.ValueOf radix 16 [duplicate] Ask Question Asked 1 year, 9 months ago. What is the radix parameter in Java, and how does it work? Related. 0.

The function act backwards as you think. You convert "11" in base 16 to base 10, so the result is 17.

Java Integer valueOf(String s, int radix) method example, The NumberFormatException will be thrown by the valueOf method if the input String with respect to radix method argument is not a parsable  parseInt(String s, int radix) methods works like so: The radix parameter is checked. It should be in the range 2 - 36; Each character of the string is parsed and verified to be a valid digit (within the bound defined by the radix) The result is multiplied for the radix and incrementally added to a results variable; The results variable is returned

To convert from base 10 to base 16 use

System.out.println(Integer.toString(11, 16));

Output will be b.

parseInt(), The parseInt() function parses a string argument and returns an integer of (For example, a radix of 10 converts from a decimal number, 8 converts For example, for hexadecimal numbers (base 16 ), A through F are used. radix − This is the radix to be used while parsing s. Return Value. This method returns the integer represented by the string argument in the specified radix. Exception. NumberFormatException − if the string does not contain a parsable int. Example. The following example shows the usage of java.lang.Integer.parseInt() method.

JavaScript parseInt() Function, The radix parameter is used to specify which numeral system to be used, for example, a radix of 16 (hexadecimal) indicates that the number in the string should  The radix parameter is used to specify which numeral system to be used, for example, a radix of 16 (hexadecimal) indicates that the number in the string should be parsed from a hexadecimal number to a decimal number.

Core Java 2: Fundamentals, The other number classes implement corresponding methods. java.lang. a representation of the number i in the base specified by the radix parameter. However, you can also access this information by working with a special Java class. A parameter is a value that you can pass to a method in Java. Then the method can use the parameter as though it were a local variable initialized with the value of the variable passed to it by the calling method.

String to Integer in Java - parseInt(), Convert String to Integer in Java using parseInt() with examples. While operating upon strings, there are times when we need to convert a number This function parses the string argument as a signed integer in the radix specified by the  In mathematics, radix means base, where decimal would be base 10. Imagine you have numbers some of which having more than one digits like. 5, 213, 55, 21, 2334, 31, 20, 430 For simplicity, say you want to use the decimal radix (=10) for sorting.

Comments
  • The other way round. You're asking it to interpret "11" in base-16. i.e. 1*16 + 1.
  • Thanks for the clarification
  • @MinhTran Please checkmark the answer that helped you most.