How to Convert a Unicode String "\uFFFF" to a Character in Java

How can I convert the Unicode string "\uFFFF" into a character in Java?

String unicodeString = "\uFFFF"; char character = (char) Integer.parseInt(unicodeString.replaceAll("\\u", ""), 16);

In Java, converting a Unicode representation like "\uFFFF" into a character can be done through parsing the string. You can extract the hexadecimal value, convert it into an integer, and then cast it to a char. This process enables you to effectively handle Unicode characters in your applications.

String unicodeString = "\uFFFF"; 
char character = (char) Integer.parseInt(unicodeString.replaceAll("\\u", ""), 16); 
System.out.println(character); // Prints: ￿ 
// This will print the character corresponding to the Unicode FFFF.

Causes

• The Unicode representation is a string format that must be converted to its character equivalent.
• Misunderstanding Java string parsing can lead to incorrect conversions.

Solutions

• Use `Integer.parseInt()` to convert the hexadecimal portion of the Unicode string.
• Ensure to replace the Unicode escape sequence properly before parsing.

Mistake: Not escaping the backslash correctly in the Unicode string.

Solution: Always use double backslashes (`\\u`) when writing Unicode strings in Java to avoid escape sequence issues.

Mistake: Assuming all Unicode strings are valid and represent characters.

Solution: Validate the Unicode string before conversion to avoid `NumberFormatException`.