Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) throws Exception {

        String patternStr = "i.e.";

        boolean matchFound = Pattern.matches(patternStr, "i.e.");
        matchFound = Pattern.matches(patternStr, "ibex");

        // Quote the pattern; i.e. surround with \Q and \E
        matchFound = Pattern.matches("\\Q" + patternStr + "\\E", "i.e.");
        matchFound = Pattern.matches("\\Q" + patternStr + "\\E", "ibex");

        // Escape the pattern
        patternStr = escapeRE(patternStr);

        matchFound = Pattern.matches(patternStr, "i.e.");
        matchFound = Pattern.matches(patternStr, "ibex");

        // Returns a pattern where all punctuation characters are escaped.

    }

    public static String escapeRE(String str) {
        Pattern escaper = Pattern.compile("([^a-zA-z0-9])");
        return escaper.matcher(str).replaceAll("\\\\$1");
    }
}