Regular expression in java with example

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Regular expression in java with example

Regular expression (regex) is used in java to find a particular patter in an string.
or
Regular expression are used for defining staring patterns that can be used for searching, manipulating and editing a text.

Example : In below example we have used method Pattern.matches() to search a pattern in a string.

package javapkgn;
import java.util.regex.Pattern;
public class Creg
{
public static void main(String args[])
{
String abc = "hello how are you? hope you are fine";
String def = "(.)you(.)";
boolean isMatch = Pattern.matches(def, abc);
System.out.println("your matches are:" +isMatch);
}
}

Output:
your matches are:true
Note: This will search only single occurrence in text for pattern.