Question

Exercise 3 – Strings

Using a function Write a program that prompts the user to enter two inputs: some text and a word. The program outputs the starting indices of all occurrences of the word in the text. If the word is not found, the program should output “not found”.

Example1:

Input1: my dog and myself are going to my friend

Input2: my

Output: 0 11 31

Example 2:

Input1: Programming is fun

Input 2: my

Output: not found

Answer 1

import java.util.Scanner;

public class SubStringsIndexes {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s1, s2;
        int ind, sum = 0;
        System.out.print("Input 1: ");
        s1 = scanner.nextLine();
        System.out.print("Input 2: ");
        s2 = scanner.nextLine();

        if(s1.contains(s2)) {
            while (s1.contains(s2)) {
                ind = s1.indexOf(s2);
                System.out.print((sum+ind) + " ");
                sum += s2.length()+ind;
                s1 = s1.substring(ind + s2.length());
            }
            System.out.println();
        }
        else{
            System.out.println("not found");
        }
    }
}