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Java program to find all substrings of a string

Java program to find substrings of a string: This program finds all substrings of a string and then prints them. For example, substrings of "fun" are: "f", "fu", "fun", "u", "un" and "n". The substring method of String class is used to find a substring. For a string of length n, there are (n(n+1))/2 non-empty substrings and an empty string. An empty or NULL string is considered to be a substring of every string.

Find substrings of a string in Java

import java.util.Scanner;
class SubstringsOfAString
   public static void main(String args[])
      String string, sub;
      int i, c, length;
      Scanner in = new Scanner(;
      System.out.println("Enter a string to print all its substrings");
      string  = in.nextLine();
      length = string.length();  

      System.out.println("Substrings of \""+string+"\" are:");
      for (c = 0; c < length; c++)
         for(i = 1; i <= length - c; i++)
            sub = string.substring(c, c+i);

Output of program:
Output of Java program fo find all substrings of a string

Download Substrings of a string program class file.