How to Convert a Character to a String in Java: Which Method is Best?

Converting Characters to Strings in Java:

When working with character data, it is sometimes necessary to convert a single character represented by a char to a String. Java provides several methods to facilitate this conversion.

Character.toString() and String.valueOf()

The most direct method is to use the Character.toString(char) method. This method takes a single character as input and returns its corresponding string representation. For example:

<code class="java">char ch = 'a';
String str = Character.toString(ch); // str now contains "a"</code>

String.valueOf(char) is another method that essentially does the same thing. It takes a variety of data types as input, including characters, and returns their string representations.

String Concatenation

A less efficient but effective shortcut is to use string concatenation. Simply concatenate an empty string with the character you want to convert:

<code class="java">String str = "" + 'a'; // str now contains "a"</code>

However, this method is less efficient because it involves unnecessary object creation.

Choosing the Right Method

For performance-sensitive applications, Character.toString(char) or String.valueOf(char) are the recommended methods. They offer direct conversion and avoid unnecessary object creation. For convenience, string concatenation can be used when efficiency is not a priority.

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