Java Special Characters and Escape Sequences

Some characters can't be written directly inside a string literal — a " would end the string, a literal newline would break the source code, and a backslash means "what follows is an escape." Java uses escape sequences to represent these characters, plus Unicode escapes for any code point in the Basic Multilingual Plane.

The standard escape sequences

Examples:

String multi = "Line 1\nLine 2\nLine 3";
String quoted = "She said \"hi\"";
String tabbed = "name\tage\tcity";
String path = "C:\\Users\\Ada\\code.java";

When you print these, the escape sequences become the actual characters:

Line 1
Line 2
Line 3
She said "hi"
name    age    city
C:\Users\Ada\code.java

Inside a char literal

A char literal is enclosed in single quotes. You'll need \' to put a literal single quote inside one:

char quote = '\'';
char tab   = '\t';
char back  = '\\';

Unicode escapes

To embed any Basic Multilingual Plane character, use \uXXXX where XXXX is the 4-digit hex code point:

String greeting = "Café";       // "Café"
String pi = "π ≈ 3.14";   // "π ≈ 3.14"
char heart = '♥';               // '♥'

Unicode escapes are processed by the compiler before anything else, so they work anywhere in the source — even inside identifiers (don't actually do that — keep your code readable).

Code points outside the BMP (most emoji) need a surrogate pair or the \N{name} syntax — easier to just paste the character directly.

Octal escapes

\ followed by 1–3 octal digits (0–7) is the character with that octal value:

char c = '\101';   // 'A' (decimal 65)
char d = '\14';    // form feed

You'll rarely see these — Unicode escapes are clearer.

Raw text blocks bypass most escapes

In a text block (Java 15+), you can write newlines, tabs, and double quotes literally. The only sequences you still need to escape are \\ and Unicode escapes:

String json = """
        {
          "name": "Ada",
          "tagline": "She “invented” programming"
        }
        """;

Notice the "name" and "tagline" keys don't need \" — they sit inside a """...""" block.

A demonstration

Common mistakes

• Writing "\n" and expecting Windows line endings. \n is LF only. For platform-correct newlines in formatted output, use %n inside printf / format.
• Forgetting to escape backslashes in regex. Inside a Java string, regex \d is written "\\d" — two characters: a backslash and a d, which the regex engine sees as \d.
• Using \u to embed a newline. is a newline — and because Unicode escapes are processed before the tokenizer, it breaks your source line in half. Use \n for newlines in strings.

What's next

Java Numbers takes a focused look at the numeric types, their literals, and their precision.

Practice