Answer:
In Java:
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String longstring, substring;
System.out.print("Enter a long string: ");
longstring = input.nextLine();
System.out.print("Enter a substring: ");
substring = input.nextLine();
System.out.println("Length of your string: "+longstring.length());
System.out.println("Length of your substring: "+substring.length());
System.out.println("Starting position of your substring: "+longstring.indexOf(substring));
String before = longstring.substring(0, longstring.indexOf(substring));
System.out.println("String before your substring: "+before);
String after = longstring.substring(longstring.indexOf(substring) + substring.length());
System.out.println("String after your substring: "+after);
System.out.print("Enter a position between 0 and "+(longstring.length()-1)+": ");
int pos;
pos = input.nextInt();
System.out.println("The character at position "+pos+" is: "+longstring.charAt(pos));
System.out.print("Enter a replacement string: ");
String repl;
repl = input.nextLine();
System.out.println("Your new string is: "+longstring.replace(substring, repl));
System.out.println("Goodbye!");
}
}
Explanation:
<em>Because of the length of the explanation; I've added the explanation as an attachment where I used comments to explain the lines</em>
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