How to Append a Newline Character to a StringBuilder in Java?

How can I append a newline character to a StringBuilder in Java?

StringBuilder result = new StringBuilder();
result.append("Hello World!");

Appending a newline character to a StringBuilder in Java can be accomplished using the correct escape sequence or a pre-defined constant. The confusion typically arises from the usage of an incorrect escape sequence, like using "/n" instead of the correct "\n".

StringBuilder result = new StringBuilder();
result.append("Hello World!");
result.append("\n");
// Or using System.lineSeparator()
result.append(System.lineSeparator());

Causes

• Using an incorrect escape sequence for newline (e.g., using '/n' instead of '\n')
• Assuming StringBuilder handles newlines in a default manner without explicit specification
• Misunderstanding of how character encoding works in Java

Solutions

• Use the correct escape sequence for a newline, which is '\n'.
• Alternatively, use System.lineSeparator() for platform-independent newline handling.
• You can also append a newline character by using the newline constant: result.append(System.lineSeparator());

Mistake: Using '/n' or other incorrect escape sequences for newlines.

Solution: Use the correct escape sequence '\n' to represent a newline.

Mistake: Not accounting for platform-specific newline characters.

Solution: Utilize System.lineSeparator() to ensure compatibility across different operating systems.