Using Regular Expressions with Java

import java.util.*;
import java.io.*;
import java.util.regex.*;
import java.util.List;

class Program {
public static void main (String[] args) throws java.lang.Exception	{

String subject = "Jane\" \"Tarzan12\" Tarzan11@Tarzan22 {4 Tarzan34}";
Pattern regex = Pattern.compile("\\{[^}]+\\}|\"Tarzan\\d+\"|(Tarzan\\d+)");
Matcher regexMatcher = regex.matcher(subject);
List<String> group1Caps = new ArrayList<String>();

// put Group 1 captures in a list
while (regexMatcher.find()) {
	if(regexMatcher.group(1) != null) {
		group1Caps.add(regexMatcher.group(1));
		}
	} // end of building the list

///////// The six main tasks we're likely to have ////////

// Task 1: Is there a match?
System.out.println("*** Is there a Match? ***");
if(group1Caps.size()>0) System.out.println("Yes");
else System.out.println("No");

// Task 2: How many matches are there?
System.out.println("\n" + "*** Number of Matches ***");
System.out.println(group1Caps.size());

// Task 3: What is the first match?
System.out.println("\n" + "*** First Match ***");
if(group1Caps.size()>0) System.out.println(group1Caps.get(0));

// Task 4: What are all the matches?
System.out.println("\n" + "*** Matches ***");
if(group1Caps.size()>0) {
   for (String match : group1Caps) System.out.println(match);
   }

// Task 5: Replace the matches
// if only replacing, delete the line with the first matcher
// also delete the section that creates the list of captures
Matcher m = regex.matcher(subject);
StringBuffer b= new StringBuffer();
while (m.find()) {
    if(m.group(1) != null) m.appendReplacement(b, "Superman");
    else m.appendReplacement(b, m.group(0));
}
m.appendTail(b);
String replaced = b.toString();
System.out.println("\n" + "*** Replacements ***");
System.out.println(replaced);

// Task 6: Split
// Start by replacing by something distinctive,
// as in Step 5. Then split.
String[] splits = replaced.split("Superman");
System.out.println("\n" + "*** Splits ***");
for (String split : splits) System.out.println(split);

} // end main
} // end Program