CharMatcher class provides the following constants to obtain CharMatcher instance.
Below are some of them
DIGIT
CharMatcher.DIGIT determines whether a character is a digit according to Unicode. If you only care to match ASCII digits, you can use inRange(‘0’, ‘9’).
Syntax:
public static final CharMatcher DIGIT
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.DIGIT field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "123 is divisible by 3" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.DIGIT;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
123 is divisible by 3 1233
Reference: https://google.github.io/guava/releases/19.0/api/docs/com/google/common/base/CharMatcher.html#DIGIT
JAVA_LETTER
CharMatcher.JAVA_LETTER determines whether a character is a letter or digit according to Java’s definition.
Syntax:
public static final CharMatcher JAVA_LETTER
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.JAVA_LETTER field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "123 is divisible by 3" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.JAVA_LETTER;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
123 is divisible by 3 isdivisibleby
ASCII
CharMatcher.ASCII determines whether a character is ASCII, meaning that its code point is less than 128.
Syntax:
public static final CharMatcher ASCII
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.ASCII field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "GeekforGeeks is fun.\u00be" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.ASCII;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
GeekforGeeks is fun.? GeekforGeeks is fun.
Reference: https://google.github.io/guava/releases/19.0/api/docs/com/google/common/base/CharMatcher.html#ASCII
ANY
CharMatcher.ANY field matches any character i.e. it matches all the characters.
Syntax:
public static final CharMatcher ANY
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.ANY field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "GeekforGeeks is fun." ;
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.ANY;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
GeekforGeeks is fun.
Reference: https://google.github.io/guava/releases/19.0/api/docs/com/google/common/base/CharMatcher.html#ANY
JAVA_LOWER_CASE
CharMatcher.JAVA_LOWER_CASE determines whether a character is lower case according to Java’s definition.
Syntax:
public static final CharMatcher JAVA_LOWER_CASE
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.JAVA_LETTER_OR_DIGIT field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "gEEKSfORgEEKS" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.JAVA_LOWER_CASE;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
gEEKSfORgEEKS gfg
Note: This class deals only with char values. It does not understand supplementary Unicode code points in the range 0x10000 to 0x10FFFF. Such logical characters are encoded into a String using surrogate pairs, and a CharMatcher treats these just as two separate characters.
JAVA_UPPER_CASE
CharMatcher.JAVA_UPPER_CASE determines whether a character is upper case according to Java’s definition.
Syntax:
public static final CharMatcher JAVA_UPPER_CASE
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.JAVA_UPPER_CASE field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "c++ JAVA python" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.JAVA_UPPER_CASE;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
c++ JAVA python JAVA
JAVA_LETTER_OR_DIGIT
CharMatcher.JAVA_LETTER_OR_DIGIT determines whether a character is a letter or digit according to Java’s definition.
Syntax:
public static final CharMatcher JAVA_LETTER_OR_DIGIT
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.JAVA_LETTER_OR_DIGIT field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "#13 is a prime & number%" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.JAVA_LETTER_OR_DIGIT;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
#13 is a prime & number% 13isaprimenumber
JAVA_DIGIT
CharMatcher.JAVA_DIGIT determines whether a character is a digit according to Java’s definition. If you only care to match ASCII digits, you can use inRange(‘0’, ‘9’).
Syntax:
public static final CharMatcher JAVA_DIGIT
Below is the implementation of the above field.
Program 1:
// Program for CharMatcher.JAVA_DIGIT field in Java import com.google.common.base.CharMatcher;
class GFG {
// Driver code
public static void main(String args[])
{
// Input string to check for matching
String input = "13 is a prime number" ;
// Printing the input
System.out.println(input);
// Declaring a CharMatcher object
CharMatcher matcher = CharMatcher.JAVA_DIGIT;
// Retaining the result after matching
String result = matcher.retainFrom(input);
// Printing the result
System.out.println(result);
}
} |
13 is a prime number 13