/home/wpollock1/public_html/Java/RegexDemo.java
// Demo showing several Java regular expression processing features.
// This code shows using a case-insensitive substring match (using capturing
// groups), then replacing the specific matched group with something.
//
// Written 10/2017 by Wayne Pollock, Tampa Florida USA
import java.util.regex.*;
class RegexDemo {
public static void main ( String [] args ) {
StringBuilder sb = new StringBuilder( "blah FOO blah" );
Matcher m =
Pattern.compile( "(f(.)\\2)", Pattern.CASE_INSENSITIVE ).matcher( sb );
if ( m.find() ) { // looking for "foo"
int start = m.start( 1 );
int end = m.end( 1 );
sb.replace(start, end, "BAR");
} else {
System.out.println( "No match!" );
}
System.out.println( sb.toString() );
}
}