Java - How to split a string between letters and digits (or between digits and letters)?

Java - How to split a string between letters and digits (or between digits and letters)?

To split a string between letters and digits in Java, you can use a regular expression along with the split() method of the String class. The regular expression should be designed to match positions in the string where a letter is followed by a digit or a digit is followed by a letter.

Here's how you can do it:

public class StringSplitExample { public static void main(String[] args) { String input = "abc123xyz456"; // Splitting the string where a letter is followed by a digit or a digit is followed by a letter String[] parts = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)"); // Displaying the parts for (String part : parts) { System.out.println(part); } } }

In this example:

  • (?<=\\D)(?=\\d) is a positive lookbehind for a non-digit (\\D) and a positive lookahead for a digit (\\d). This matches the position right between a letter and a digit.
  • (?<=\\d)(?=\\D) is a positive lookbehind for a digit and a positive lookahead for a non-digit. This matches the position right between a digit and a letter.

Combining these two with the | (logical OR) operator in the split() method allows the string to be split at every point where a letter is followed by a digit or a digit is followed by a letter.

  1. Split string into letters and digits in Java:

    • Use the replaceAll method with a regular expression to separate letters and digits.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  2. Separate letters and digits in Java string:

    • Utilize the split method with a regular expression to separate letters and digits.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  3. Java regex split string between alpha and numeric characters:

    • Apply the split method with a regular expression to split between alpha and numeric characters.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  4. Split alphanumeric string into letters and digits Java:

    • Use the split method with a regular expression to separate letters and digits.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  5. Java split string between digits and letters regex:

    • Leverage the split method with a regular expression to split between digits and letters.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  6. Tokenize string into letters and digits in Java:

    • Tokenize the string using the split method with a regular expression to separate letters and digits.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  7. Java regex match letters and digits in a string:

    • Use the replaceAll method with a regular expression to match letters and digits.
    String input = "abc123xyz456"; String result = input.replaceAll("[^a-zA-Z0-9]", ","); String[] splitResult = result.split(",");

  8. How to split a string between numbers and letters in Java:

    • Apply the split method with a regular expression to split between numbers and letters.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

  9. Java regular expression for splitting string by letters and digits:

    • Utilize the split method with a regular expression to split between letters and digits.
    String input = "abc123xyz456"; String[] result = input.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

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