opennlp.tools.util

Class StringUtil

java.lang.Object

opennlp.tools.util.StringUtil

public class StringUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
StringUtil()

Method Summary

Modifier and Type	Method and Description
static boolean	isEmpty(java.lang.CharSequence theString) Returns true if CharSequence.length() is 0 or null.
static boolean	isWhitespace(char charCode) Determines if the specified character is a whitespace.
static boolean	isWhitespace(int charCode) Determines if the specified character is a whitespace.
static java.lang.String	toLowerCase(java.lang.CharSequence string) Converts to lower case independent of the current locale via Character.toLowerCase(char) which uses mapping information from the UnicodeData file.
static java.lang.String	toUpperCase(java.lang.CharSequence string) Converts to upper case independent of the current locale via Character.toUpperCase(char) which uses mapping information from the UnicodeData file.

Methods inherited from class java.lang.Object

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

Constructor Detail

StringUtil

public StringUtil()

Method Detail

isWhitespace

public static boolean isWhitespace(char charCode)

Determines if the specified character is a whitespace. A character is considered a whitespace when one of the following conditions is meet:

• Its a Character.isWhitespace(int) whitespace.
• Its a part of the Unicode Zs category (Character.SPACE_SEPARATOR).

Character.isWhitespace(int) does not include no-break spaces. In OpenNLP no-break spaces are also considered as white spaces.

Parameters:

charCode -

Returns:

true if white space otherwise false

isWhitespace

public static boolean isWhitespace(int charCode)

Determines if the specified character is a whitespace. A character is considered a whitespace when one of the following conditions is meet:

• Its a Character.isWhitespace(int) whitespace.
• Its a part of the Unicode Zs category (Character.SPACE_SEPARATOR).

Character.isWhitespace(int) does not include no-break spaces. In OpenNLP no-break spaces are also considered as white spaces.

Parameters:

charCode -

Returns:

true if white space otherwise false

toLowerCase

public static java.lang.String toLowerCase(java.lang.CharSequence string)

Converts to lower case independent of the current locale via Character.toLowerCase(char) which uses mapping information from the UnicodeData file.

Parameters:

string -

Returns:

lower cased String

toUpperCase

public static java.lang.String toUpperCase(java.lang.CharSequence string)

Converts to upper case independent of the current locale via Character.toUpperCase(char) which uses mapping information from the UnicodeData file.

Parameters:

string -

Returns:

upper cased String

isEmpty

public static boolean isEmpty(java.lang.CharSequence theString)

Returns true if CharSequence.length() is 0 or null.

Returns:

true if CharSequence.length() is 0, otherwise false

Since:

1.5.1