THE PACKAGE JAVA.LANG

java.lang.String

20.12

ooffset+len

 is greater than the length of the

other

 argument.

There is some nonnegative integer

k

 less than

len

 such that:

this.charAt(toffset+k) != other.charAt(ooffset+k)

If

other

 is

null

, then a

NullPointerException

 is thrown.

20.12.19

public boolean regionMatches(boolean ignoreCase,

int toffset, String other, int ooffset, int len)

throws NullPointerException

A substring of this

String

 object is compared to a substring of the argument

other

. The result is

true

 if these substrings represent character sequences that

are the same, ignoring case if and only if

ignoreCase

 is true. The substring of

this

String

 object to be compared begins at index

toffset

 and has length

len

.

The substring of

other

 to be compared begins at index

ooffset

 and has length

len

. The result is

false

 if and only if at least one of the following is true:

toffset

 is negative.

ooffset

 is negative.

toffset+len

 is greater than the length of this

String

 object.

ooffset+len

 is greater than the length of the

other

 argument.

There is some nonnegative integer

k

 less than

len

 such that:

this.charAt(toffset+k) != other.charAt(ooffset+k)

ignoreCase

 is

true

 and there is some nonnegative integer

k

 less than

len

such that:

Character.toLowerCase(this.charAt(toffset+k)) !=

Character.toLowerCase(other.charAt(ooffset+k))

and

:

Character.toUpperCase(this.charAt(toffset+k)) !=

Character.toUpperCase(other.charAt(ooffset+k))

If

other

 is

null

, then a

NullPointerException

 is thrown.

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