How to Unescape Java String Literals?

How to Unescape a Java String Literal in Java?

Java doesn't provide a straightforward function for unescaping string literals. This task requires manually converting character escape sequences into their corresponding characters.

Common Character Escapes

Escape Sequence	Character
	Backslash
n	Newline
r	Carriage return
t	Tab
b	Backspace
f	Form feed
"	Double quote
'	Single quote

Unescaping String Literals

One approach to unescape string literals is to use a custom function that iterates through the string, identifying escape sequences, and replacing them with the appropriate characters.

public static String unescape(String str) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i <p><strong>Example:</strong></p><pre class="brush:php;toolbar:false">String original = "\\"Hello, World!\\"";
String unescaped = unescape(original);
System.out.println(unescaped); // Output: "Hello, World!"

Libraries for String Unescaping

Some third-party libraries also provide functions for unescaping string literals. For example, the Apache Commons Lang library has the following method:

public static String unescapeJava(String str)

This method can be used to unescape Java string literals, including escape sequences not covered by the basic approach mentioned above.

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