printTextPerRole.java

private String printTextPerRole(String[] roles, String[] textLines) {
    StringBuilder sb = new StringBuilder();
    for (String role : roles){
        sb.append(role + ":\n");
        for (int line = 0; line < textLines.length; line++){
            int indexOfColon = textLines[line].indexOf(":");
            String roleInLine = textLines[line].substring(0,indexOfColon);
            if (role.equalsIgnoreCase(roleInLine)){
                int lineNumInScript = line + 1;
                int indexOfSpeech = indexOfColon+1;
                String speech = textLines[line].substring(indexOfSpeech);
                sb.append(lineNumInScript + ")" + speech +"\n");
            }
        }
        sb.append("\n");
    }
    return sb.toString();
}