//: strings/TestRegularExpression.java // Easily try out regular expressions. // {Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" } import java.util.regex.*; import static net.mindview.util.Print.*; public class TestRegularExpression { public static void main(String[] args) { if(args.length < 2) { print("Usage:\njava TestRegularExpression " + "characterSequence regularExpression+"); System.exit(0); } print("Input: \"" + args[0] + "\""); for(String arg : args) { print("Regular expression: \"" + arg + "\""); Pattern p = Pattern.compile(arg); Matcher m = p.matcher(args[0]); while(m.find()) { print("Match \"" + m.group() + "\" at positions " + m.start() + "-" + (m.end() - 1)); } } } } /* Output: Input: "abcabcabcdefabc" Regular expression: "abcabcabcdefabc" Match "abcabcabcdefabc" at positions 0-14 Regular expression: "abc+" Match "abc" at positions 0-2 Match "abc" at positions 3-5 Match "abc" at positions 6-8 Match "abc" at positions 12-14 Regular expression: "(abc)+" Match "abcabcabc" at positions 0-8 Match "abc" at positions 12-14 Regular expression: "(abc){2,}" Match "abcabcabc" at positions 0-8 *///:~