org.topoweb.util
Class StringUtil

java.lang.Object
  |
  +--org.topoweb.util.StringUtil

public class StringUtil

extends java.lang.Object

Procedures for manipulating strings.

Constructor Summary

StringUtil()

Method Summary

static java.lang.StringBuffer	appendSubstring(java.lang.StringBuffer buffer, java.lang.String string, int start, int end) Appends the specified substring into the given buffer.
static int	nthIndexOf(char c, java.lang.String string, int n) Finds and returns the index of the nth occurance of the specified character in the given string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StringUtil

public StringUtil()

Method Detail

appendSubstring

public static java.lang.StringBuffer appendSubstring(java.lang.StringBuffer buffer,
                                                     java.lang.String string,
                                                     int start,
                                                     int end)

Appends the specified substring into the given buffer. If the buffer has enough capacity, no intermediate objects are allocated. If the passed in substring indices are out of bounds, an IndexOutOfBoundsException is thrown in a non-fail-safe manner (the state of the buffer may have changed).

Parameters:

buffer - the buffer appended

string - the string copied from

start - the inclusive starting index of the substring in string

end - the exclusive ending index of the substring in string

Returns:

the buffer passed in

nthIndexOf

public static int nthIndexOf(char c,
                             java.lang.String string,
                             int n)

Finds and returns the index of the n^th occurance of the specified character in the given string. The behavior is undefined if n <= 0.

Parameters:

c - the character searched for

string - the string searched in

n - the n^th occurance of c

Returns:

the index of the n^th occurance of c in the given string; or -1, if c does not occur n times