Use find() to find a subsequence. : Pattern « Regular Expressions « Java Tutorial

import java.util.regex.Matcher;
import java.util.regex.Pattern;

class RegExpr2 {
  public static void main(String args[]) {
    Pattern pat = Pattern.compile("Java");
    Matcher mat = pat.matcher("Java 2");

    System.out.println("Looking for Java in Java 2.");

    if (mat.find())
      System.out.println("subsequence found");
      System.out.println("No Match");

8.5.1.Use Pattern class to match
8.5.2.Pattern.compile method
8.5.3.Reuse Pattern Method
8.5.4.Control the pattern case
8.5.5.A simple pattern matching demo.
8.5.6.Use find() to find a subsequence.
8.5.7.Use find() to find multiple subsequences.
8.5.8.Use a quantifier.
8.5.9.Use wildcard and quantifier.
8.5.10.Use the ? quantifier.
8.5.11.Use a character class.
8.5.12.Split by number
8.5.13.Split by :