Java - valueOf() Method

Description

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. The method can take two arguments, where one is a String and the other is a radix.

Syntax

Following are all the variants of this method −

static Integer valueOf(int i)
static Integer valueOf(String s)
static Integer valueOf(String s, int radix)

Parameters

Here is the detail of parameters −

i − An int for which Integer representation would be returned.
s − A String for which Integer representation would be returned.
radix − This would be used to decide the value of returned Integer based on the passed String.

Return Value

valueOf(int i) − This returns an Integer object holding the value of the specified primitive.
valueOf(String s) − This returns an Integer object holding the value of the specified string representation.
valueOf(String s, int radix) − This returns an Integer object holding the integer value of the specified string representation, parsed with the value of radix.

Example 1

In this example, we're showing the usage of valueOf(int) and valueOf(double) method to get an Integer/Double objects holding the value of provided int/double, primitive variables. We've created a Integer variable x, Double variable d. Using valueOf(int) and valueOf(double), we're populating x and b and then these variables are printed to verify the result.

public class Test { 
   public static void main(String args[]) {
      Integer x =Integer.valueOf(9);
      Double d = Double.valueOf(5);
    
      System.out.println(x); 
      System.out.println(d);
   }
}

This will produce the following result −

Output

9
5.0

Example 2

In this example, we're showing the usage of valueOf(String) method to get an Integer/Double objects holding the value of provided int/double, in form of String. We've created a Integer variable x, Double variable d. Using valueOf(String), we're populating x and b and then these variables are printed to verify the result.

public class Test { 
   public static void main(String args[]) {
      Integer x =Integer.valueOf("9");
      Double d = Double.valueOf("5");
    
      System.out.println(x); 
      System.out.println(d);
   }
}

This will produce the following result −

Output

9
5.0

Example 3

In this example, we're showing the usage of valueOf(String, int radix) method to get an Integer object holding the value of provided int, in form of String for a given radix. We've created a Integer variable x. Using valueOf(String, int), we're populating x based on radix 16 and then this variables is printed to verify the result.

public class Test { 
   public static void main(String args[]) {
      Integer x =Integer.valueOf("A", 16);
    
      System.out.println(x);
   }
}

This will produce the following result −

Output

java_numbers.htm