Java Character getNumericValue() Method

The getNumericValue() method of character class returns the int value of the specified character. If the character does not have any int value, -1 is returned. If the character has a numeric value that cannot be represented as a non-negative integer, -2 is returned.

Syntax

Parameter

The above method requires only one parameter:

The codePoint is the character(Unicode code point) to be converted.

Return Value

The getNumericValue(int codePoint) method returns the numeric value of the character, as a non-negative int value. This method will return -2 if the character has a numeric value but the value cannot be represented as a non-negative int value. The method will return -1 if the character has no numeric value..

Example 1

public class JavaCharactergetNumericValueExample1 {
	public static void main(String[] args) {
		// Initialize a codepoint
		int codepoint = 110;
		// Convert codepoint to char
		char ch = (char) codepoint;
		// Convert the code point to its numeric value
		int digit = Character.getNumericValue(codepoint);
		// Print the result
System.err.println("The character '" + ch + "' has a numeric value represented as: " + digit);
	}
}

Output:

The character 'n' has a numeric value represented as: 23

Example 2

public class JavaCharactergetNumericValueExample2 {
   public static void main(String[] args) {
	 int obj1 = 88, obj2 = 0x0f600;
	 int a1 = Character.getNumericValue(obj1);
	 int b2 = Character.getNumericValue(obj2);
	 String str1 = "Numeric value for code point obj1 is " + a1;
	 String str2 = "Numeric value for code point obj2 is " + b2;
   // Print a1 and i2 
	 System.out.println( str1 );
	 System.out.println( str2 );
	   }
	}

Output:

Numeric value for code point obj1 is 33
Numeric value for code point obj2 is -1

Example 3

public class JavaCharactergetNumericExample3 {
	   public static void main(String[] args) {
		// Initialize a codepoint
			int codepoint1 = 110;
		    int codepoint2 = 00;			
		    int codepoint3 = 54;
	   // Convert codepoint to char
		    char ch1 = (char) codepoint1;
			char ch2 = (char) codepoint2;
		    char ch3 = (char) codepoint3;
	   // Convert the code point to its numeric value
			int digit1 = Character.getNumericValue(codepoint1);
			int digit2 = Character.getNumericValue(codepoint2);
		    int digit3 = Character.getNumericValue(codepoint3);
	  // Print the result
	System.err.println("The character '" + ch1 + "' has a numeric value represented as: " + digit1);
	System.err.println("The character '" + ch2 + "' has a numeric value represented as: " + digit2);
	System.err.println("The character '" + ch3 + "' has a numeric value represented as: " + digit3);
				}
			}

Output:

The character 'n' has a numeric value represented as: 23
The character ' ' has a numeric value represented as: -1
The character '6' has a numeric value represented as: 6

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