import java.io.BufferedReader;
import java.io.Console;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class RegexTestHarness {

    public static void main(String[] args){
        
        while (true) {
        	String regexLine = readLine("\nEnter your regex:");
        	Pattern pattern = 
            Pattern.compile(regexLine);

        	String searchLine = readLine("Enter your input string to search: ");
        	
            Matcher matcher = 
            pattern.matcher(searchLine);

            boolean found = false;
            while (matcher.find()) {
                System.out.printf("I found the text" +
                    " \"%s\" starting at " +
                    "index %d and ending at index %d.\n",
                    matcher.group(),
                    matcher.start(),
                    matcher.end());
                found = true;
            }
            if(!found){
                System.out.printf("No match found.\n");
            }
        }
    }


    private static String readLine(String prompt) {
    	String line = null;
    	Console c = System.console();
    	if (c != null) {
    		line = c.readLine(prompt);
    	} else {
    		System.out.print(prompt);
    		BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
    		try {
    			line = bufferedReader.readLine();
    		} catch (IOException e) { 
            //Ignore    
    		}
    	}
    return line;
    }
}