Quintessential Regular Expression Search Program
This example demonstrates how to use a regular expression
to find matches in a string.
import java.util.regex.*;
public class BasicMatch {
public static void main(String[] args) {
// Compile regular expression
String patternStr = "b";
Pattern pattern = Pattern.compile(patternStr);
// Determine if pattern exists in input
CharSequence inputStr = "a b c b";
Matcher matcher = pattern.matcher(inputStr);
boolean matchFound = matcher.find(); // true
// Get matching string
String match = matcher.group(); // b
// Get indices of matching string
int start = matcher.start(); // 2
int end = matcher.end(); // 3
// the end is index of the last matching character + 1
// Find the next occurrence
matchFound = matcher.find(); // true
}
}
Post a comment