StringBuilder

Versions

[{“Name”:“Java SE 5”,“GroupName”:null},{“Name”:“Java SE 6”,“GroupName”:null},{“Name”:“Java SE 7”,“GroupName”:null},{“Name”:“Java SE 8”,“GroupName”:null},{“Name”:“Java SE 9 (Early Access)”,“GroupName”:null}]

Introduction

Java StringBuilder class is used to create mutable (modifiable) string. The Java StringBuilder class is same as StringBuffer class except that it is non-synchronized. It is available since JDK 1.5.

Syntax

• new StringBuilder ()
• new StringBuilder (int capacity)
• new StringBuilder (CharSequence seq)
• new StringBuilder (StringBuilder builder)
• new StringBuilder (String string)
• new StringJoiner (CharSequence delimiter)
• new StringJoiner (CharSequence delimiter, CharSequence prefix, CharSequence suffix)

Remarks

Creating a new StringBuilder with type char as a parameter would result in calling the constructor with argument int capacity and not the one with argument String string:

StringBuilder v = new StringBuilder('I'); //'I' is a character, "I" is a String.
System.out.println(v.capacity()); --> output 73
System.out.println(v.toString()); --> output nothing