20.12

java.lang.String

THE PACKAGE JAVA.LANG

20.12.27

public int lastIndexOf(int ch)

If a character with value

ch

 occurs in the character sequence represented by this

String

 object, then the index of the last such occurrence is returned that is, the

largest value

k

 such that:

this.charAt(k) == ch

is true. If no such character occurs in this string, then

 1

 is returned.

20.12.28

public int lastIndexOf(int ch, int fromIndex)

If a character with value

ch

 occurs in the character sequence represented by this

String

 object at an index no larger than

fromIndex

, then the index of the last

such occurrence is returned that is, the largest value

k

 such that:

(this.charAt(k) == ch) && (k <= fromIndex)

is true. If no such character occurs in this string at or before position

fromIndex

,

then

 1

 is returned.

There is no restriction on the value of

fromIndex

. If it is greater than or equal

to the length of this string, it has the same effect as if it were equal to one less than

the length of this string: this entire string may be searched. If it is negative, it has

the same effect as if it were

 1

:

 1

 is returned.

20.12.29

public int lastIndexOf(String str)

throws NullPointerException

If the string

str

 occurs as a substring of this

String

 object, then the index of the

first character of the last such substring is returned that is, the largest value

k

such that:

this.startsWith(str, k)

is true. If

str

 does not occur as a substring of this string, then

 1

 is returned.

If

str

 is

null

, a

NullPointerException

 is thrown.

20.12.30

public int lastIndexOf(String str, int fromIndex)

throws NullPointerException

If the string

str

 occurs as a substring of this

String

 object starting at an index no

larger than

fromIndex

, then the index of the first character of the last such sub 

string is returned that is, the largest value

k

 such that:

542