java.lang.Character getNumericValue(char ch)
Description
The letters A-Z in their uppercase (‘u0041’ through ‘u005A’), lowercase (‘u0061’ through ‘u007A’), and full width variant (‘uFF21’ through ‘uFF3A’ and ‘uFF41’ through ‘uFF5A’) forms have numeric values from 10 through 35. This is independent of the Unicode specification, which does not assign numeric values to these char values.
If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.
The getNumericValue(char ch) method of Character class is static thus it should be accessed statically which means the we would be calling this method in this format:
Character.getNumericValue(char ch)
Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java getNumericValue() method non statically.
Notes:
- This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getNumericValue(int) method.
Method Syntax
public static int getNumericValue(char ch)
Method Argument
| Data Type | Parameter | Description |
|---|---|---|
| char | ch | the character to be converted. |
Method Returns
The getNumericValue(char ch) method of Character class returns an int which denotes the numeric value of the character, as a nonnegative int value; -2 if the character has a numeric value that is not a nonnegative integer; -1 if the character has no numeric value.
Compatibility
Requires Java 1.1 and up
Java Character getNumericValue(char ch) Example
Below is a simple java example on the usage of getNumericValue(char ch) method of Character class.
package com.javatutorialhq.java.examples;
import java.util.Scanner;
/*
* This example source code demonstrates the use of
* getNumericValue(char ch) method of Character class.
*/
public class CharacterGetNumericValueCharExample {
public static void main(String[] args) {
// Ask for user input
System.out.print("Enter an input:");
// use scanner to get the user input
Scanner s = new Scanner(System.in);
// gets the user input
char[] value = s.nextLine().toCharArray();
// close the scanner object
s.close();
// get numeric value of user input
for (char ch : value) {
int result = Character.getNumericValue(ch);
// print the result
System.out.println("character " + ch
+ " numeric value is " + result);
}
}
}
Sample Output
Below is the sample output when you run the above example.
