How do I resolve my 'java: illegal start of type' error?

Question

The below code gives me an error saying ''java: illegal start of type". Pls, help
import java.util.regex.*;
public class Regex {
String pattern = "[a-z]+";
String textToCheck = "Hi there, I'm not Carl";
String compiledPattern = Pattern.compile(pattern);
String m = compiledPattern.matcher(textToCheck);
while (m.find()){
System.out.println(textToCheck.substring(m.start(), m.end()));
}

}

}

Answer 1

Where is main method?
Atleast You should write all definations and Calculations in a method, to compile...

Answer 2

Thx @JayakridhnaIN. Here's the code all fixed up, and I made the name of the .java class the same as the name of the class in its declaration. Here's the working code:
import java.util.regex.*;
public class Regexp {
public static void main(String[] args) {
String pattern = "[a-z]+";
String textToCheck = "Hi there, I'm not Carl";
Pattern compiledPattern = Pattern.compile(pattern);
Matcher m = compiledPattern.matcher(textToCheck);
while (m.find()) {
System.out.println(textToCheck.substring(m.start(), m.end()));
}

}
}

Answer 3

for whole words
String pattern = "[\\w']+";