The Character.getName()
method in Java is used to return the name of a specified character code point.
Table of Contents
- Introduction
getName()
Method Syntax- Examples
- Getting the Name of a Valid Code Point
- Handling Unassigned Code Points
- Real-World Use Case
- Conclusion
Introduction
The Character.getName()
method is a static method in the Character
class in Java. It returns the name of the character corresponding to a specified Unicode code point. If the code point is unassigned, it returns null
. This method is particularly useful for debugging and logging purposes when working with Unicode characters.
getName()() Method Syntax
The syntax for the getName()
method is as follows:
public static String getName(int codePoint)
- codePoint: The Unicode code point of the character.
The method returns:
- The name of the character corresponding to the specified Unicode code point.
null
if the code point is unassigned.
Examples
Getting the Name of a Valid Code Point
The getName()
method can be used to get the name of a character for a valid Unicode code point.
Example
public class GetNameExample {
public static void main(String[] args) {
int codePoint = 65; // Unicode code point for 'A'
String name = Character.getName(codePoint);
System.out.println("Name of code point 65: " + name);
}
}
Output:
Name of code point 65: LATIN CAPITAL LETTER A
In this example, the method returns the name of the character corresponding to the Unicode code point 65.
Handling Unassigned Code Points
The getName()
method returns null
if the specified code point is unassigned.
Example
public class UnassignedCodePointExample {
public static void main(String[] args) {
int unassignedCodePoint = 0x110000; // An unassigned code point
String name = Character.getName(unassignedCodePoint);
System.out.println("Name of code point 0x110000: " + name);
}
}
Output:
Name of code point 0x110000: null
In this example, the method returns null
because the code point 0x110000 is unassigned.
Checking Multiple Code Points
You can check the names of multiple code points to see their character names or handle unassigned ones.
Example
public class MultipleCodePointsExample {
public static void main(String[] args) {
int[] codePoints = { 65, 66, 67, 0x110000 };
for (int codePoint : codePoints) {
String name = Character.getName(codePoint);
if (name != null) {
System.out.println("Name of code point " + codePoint + ": " + name);
} else {
System.out.println("Code point " + codePoint + " is unassigned.");
}
}
}
}
Output:
Name of code point 65: LATIN CAPITAL LETTER A
Name of code point 66: LATIN CAPITAL LETTER B
Name of code point 67: LATIN CAPITAL LETTER C
Code point 1114112 is unassigned.
Real-World Use Case
Logging Unicode Character Information
In a real-world application, you might need to log Unicode character information for debugging or audit purposes.
Example
public class LoggingExample {
public static void main(String[] args) {
String text = "Hello, World! \uD83D\uDE00";
for (int i = 0; i < text.length(); i++) {
int codePoint = text.codePointAt(i);
String name = Character.getName(codePoint);
if (name != null) {
System.out.println("Character: " + text.charAt(i) + ", Code Point: " + codePoint + ", Name: " + name);
} else {
System.out.println("Character: " + text.charAt(i) + ", Code Point: " + codePoint + ", Name: Unassigned");
}
if (Character.isSupplementaryCodePoint(codePoint)) {
i++; // Skip the next index as it is part of the surrogate pair
}
}
}
}
Output:
Character: H, Code Point: 72, Name: LATIN CAPITAL LETTER H
Character: e, Code Point: 101, Name: LATIN SMALL LETTER E
Character: l, Code Point: 108, Name: LATIN SMALL LETTER L
Character: l, Code Point: 108, Name: LATIN SMALL LETTER L
Character: o, Code Point: 111, Name: LATIN SMALL LETTER O
Character: ,, Code Point: 44, Name: COMMA
Character: , Code Point: 32, Name: SPACE
Character: W, Code Point: 87, Name: LATIN CAPITAL LETTER W
Character: o, Code Point: 111, Name: LATIN SMALL LETTER O
Character: r, Code Point: 114, Name: LATIN SMALL LETTER R
Character: l, Code Point: 108, Name: LATIN SMALL LETTER L
Character: d, Code Point: 100, Name: LATIN SMALL LETTER D
Character: !, Code Point: 33, Name: EXCLAMATION MARK
Character: , Code Point: 32, Name: SPACE
Character: ?, Code Point: 128512, Name: GRINNING FACE
Conclusion
The Character.getName()
method in Java is a useful tool for retrieving the name of a character corresponding to a specified Unicode code point. By understanding how to use this method, you can efficiently handle and log character information in your Java applications. Whether you are checking individual characters, handling unassigned code points, or logging Unicode character details, the getName()
method provides a reliable solution for these tasks.