Question

Write a test class to test the following methods in the java.lang.String class:

○ length

○ charAt

○ substring

○ indexOf

Thank you in advance.

Answer 1

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.print("Enter long string: ");
    String s = sc.nextLine();

    System.out.println("Length of string: "+s.length());
    System.out.println("Char at index 0 is : "+s.charAt(0));
    System.out.println("Sub string from index 1 to 3: "+s.substring(1,3));
    System.out.println("indexOf of char i is : "+s.indexOf('i'));

  }
}