All Implemented Interfaces:
Serializable, Appendable, CharSequence, Comparable<StringBuilder>

  • Constructor Summary

    Constructors

    Constructs a string builder with no characters in it and an initial capacity of 16 characters.

    StringBuilder(int capacity)

    Constructs a string builder with no characters in it and an initial capacity specified by the capacity argument.

    Constructs a string builder that contains the same characters as the specified CharSequence.

    Constructs a string builder initialized to the contents of the specified string.

  • Method Summary

    append(boolean b)

    Appends the string representation of the boolean argument to the sequence.

    append(char c)

    Appends the string representation of the char argument to this sequence.

    append(char[] str)

    Appends the string representation of the char array argument to this sequence.

    append(char[] str, int offset, int len)

    Appends the string representation of a subarray of the char array argument to this sequence.

    append(double d)

    Appends the string representation of the double argument to this sequence.

    append(float f)

    Appends the string representation of the float argument to this sequence.

    append(int i)

    Appends the string representation of the int argument to this sequence.

    append(long lng)

    Appends the string representation of the long argument to this sequence.

    Appends the specified character sequence to this Appendable.

    Appends a subsequence of the specified CharSequence to this sequence.

    Appends the string representation of the Object argument.

    Appends the specified string to this character sequence.

    Appends the specified StringBuffer to this sequence.

    appendCodePoint(int codePoint)

    Appends the string representation of the codePoint argument to this sequence.

    int

    capacity()

    Returns the current capacity.

    char

    charAt(int index)

    Returns the char value in this sequence at the specified index.

    chars()

    Returns a stream of int zero-extending the char values from this sequence.

    int

    codePointAt(int index)

    Returns the character (Unicode code point) at the specified index.

    int

    codePointBefore(int index)

    Returns the character (Unicode code point) before the specified index.

    int

    codePointCount(int beginIndex, int endIndex)

    Returns the number of Unicode code points in the specified text range of this sequence.

    Returns a stream of code point values from this sequence.

    int

    Compares two StringBuilder instances lexicographically.

    delete(int start, int end)

    Removes the characters in a substring of this sequence.

    deleteCharAt(int index)

    Removes the char at the specified position in this sequence.

    void

    ensureCapacity(int minimumCapacity)

    Ensures that the capacity is at least equal to the specified minimum.

    void

    getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin)

    Characters are copied from this sequence into the destination character array dst.

    int

    Returns the index within this string of the first occurrence of the specified substring.

    int

    indexOf(String str, int fromIndex)

    Returns the index within this string of the first occurrence of the specified substring, starting at the specified index.

    insert(int offset, boolean b)

    Inserts the string representation of the boolean argument into this sequence.

    insert(int offset, char c)

    Inserts the string representation of the char argument into this sequence.

    insert(int offset, char[] str)

    Inserts the string representation of the char array argument into this sequence.

    insert(int index, char[] str, int offset, int len)

    Inserts the string representation of a subarray of the str array argument into this sequence.

    insert(int offset, double d)

    Inserts the string representation of the double argument into this sequence.

    insert(int offset, float f)

    Inserts the string representation of the float argument into this sequence.

    insert(int offset, int i)

    Inserts the string representation of the second int argument into this sequence.

    insert(int offset, long l)

    Inserts the string representation of the long argument into this sequence.

    Inserts the specified CharSequence into this sequence.

    insert(int dstOffset, CharSequence s, int start, int end)

    Inserts a subsequence of the specified CharSequence into this sequence.

    Inserts the string representation of the Object argument into this character sequence.

    Inserts the string into this character sequence.

    int

    Returns the index within this string of the last occurrence of the specified substring.

    int

    lastIndexOf(String str, int fromIndex)

    Returns the index within this string of the last occurrence of the specified substring, searching backward starting at the specified index.

    int

    length()

    Returns the length (character count).

    int

    offsetByCodePoints(int index, int codePointOffset)

    Returns the index within this sequence that is offset from the given index by codePointOffset code points.

    repeat(int codePoint, int count)

    Repeats count copies of the string representation of the codePoint argument to this sequence.

    Appends count copies of the specified CharSequence cs to this sequence.

    replace(int start, int end, String str)

    Replaces the characters in a substring of this sequence with characters in the specified String.

    reverse()

    Causes this character sequence to be replaced by the reverse of the sequence.

    void

    setCharAt(int index, char ch)

    The character at the specified index is set to ch.

    void

    setLength(int newLength)

    Sets the length of the character sequence.

    subSequence(int start, int end)

    Returns a new character sequence that is a subsequence of this sequence.

    substring(int start)

    Returns a new String that contains a subsequence of characters currently contained in this character sequence.

    substring(int start, int end)

    Returns a new String that contains a subsequence of characters currently contained in this sequence.

    toString()

    Returns a string representing the data in this sequence.

    void

    Attempts to reduce storage used for the character sequence.

  • Constructor Details

    • StringBuilder

    • StringBuilder

    • StringBuilder

    • StringBuilder

  • Method Details

    • compareTo

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • append

    • appendCodePoint

    • delete

    • deleteCharAt

    • replace

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • insert

    • indexOf

    • indexOf

    • lastIndexOf

    • lastIndexOf

    • reverse

    • repeat

    • repeat

    • toString

    • length

    • capacity

    • ensureCapacity

    • trimToSize

    • setLength

    • charAt

    • codePointAt

    • codePointBefore

    • codePointCount

    • offsetByCodePoints

    • getChars

    • setCharAt

    • substring

    • subSequence

    • substring

    • chars

    • codePoints