import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
    String text = "Assert.assertEquals(/\"Hello World, /\" + \"Hello!\", expectedVar2, actualVar)";
    String pattern = "Assert\\.assertEquals\\((?>(?:[^,]*\"(?:[^,]*,)+[^,]*\")+|[^,]+),\\s*([^,]+)";
    Pattern r = Pattern.compile(pattern);
    Matcher m = r.matcher(text);
    if (m.find()) {
      System.out.println("MATCH FOUND: " + m.group(1));
    } else {
      System.out.println("NO MATCH");
    }
  }
}

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