Чтобы получить подстроку после первого появления разделителя в Java, вы можете использовать различные методы. Вот несколько примеров:

1. Метод String.split():

   String input = "example: getting the substring after the first occurrence of a separator in java";
   String separator = ":";
   String[] parts = input.split(separator, 2); // Split the input into two parts at the first occurrence of the separator
   String substring = parts[1].trim(); // Get the substring after the separator, removing any leading or trailing whitespace
   System.out.println(substring);

2. Метод String.substring():

   String input = "example: getting the substring after the first occurrence of a separator in java";
   String separator = ":";
   int index = input.indexOf(separator); // Find the index of the first occurrence of the separator
   String substring = input.substring(index + separator.length()).trim(); // Get the substring after the separator, removing any leading or trailing whitespace
   System.out.println(substring);

3. Класс StringTokenizer:

   String input = "example: getting the substring after the first occurrence of a separator in java";
   String separator = ":";
   StringTokenizer tokenizer = new StringTokenizer(input, separator);
   tokenizer.nextToken(); // Skip the first token
   String substring = tokenizer.nextToken().trim(); // Get the substring after the separator, removing any leading or trailing whitespace
   System.out.println(substring);