Question

Meant to be written in Java JDK 14.0

4. Define 2 String variables str1 and str2, get input from console and assign input to str1 and str2. (a) Display the length of str1 and str2 (b) Display the first and last characters in str1 and str2 (c) Compare str1 and str2 to check if they are equal or not: (1) The comparison is case sensitive (2) The comparison is case insensitive (d) Compare str1 with str2 to check which string is smaller; display the smaller string first: (1) The comparison is case sensitive (2) The comparison is case insensitive (e) Convert characters in str1 to upper case and display new string (f) Convert characters in str2 to lower case and display new string 2020 (g) Extract the first and last characters in str1, extract the 2nd character from the front and the 2nd character from the end in str2; put these 4 characters together to create a new string and display (h) Extract the first words and the last words from both str1 and str2. Combine these words to create a new string. The words should be separated by white space. Display this new string

Answer 1

import java.util.Scanner;

public class StringOperations {
   public static void main(String[] args) {
//       Define 2 String variables str1 and str2, get input from console and assign input to str1 and str2.
       String str1,str2;
       Scanner sc = new Scanner(System.in);
       System.out.print("Enter string1 :");
       str1 = sc.nextLine();
       System.out.print("Enter string2 :");
       str2 = sc.nextLine();
//       (a) Display the length of str1 and str2
       System.out.println("string1 length : "+str1.length());
       System.out.println("string2 length : "+str2.length());
      
//       (b) Display the first and last characters in str1 and str2
       System.out.println("first character of string1 :"+str1.charAt(0));
       System.out.println("last character of string1 :"+str1.charAt(str1.length()-1));
       System.out.println("first character of string2 :"+str2.charAt(0));
       System.out.println("last character of string2 :"+str2.charAt(str2.length()-1));
      
//       (c) Compare str1 and str2 to check if they are equal or not:
       System.out.println("(1) The comparison is case sensitive ");
       System.out.println(str1.equals(str2)?"Both string1 and string2 are equal":"Both String1 and string2 are not equal");
      
//       (2) The comparison is case insensitive
       System.out.println("(1) The comparison is case insensitive ");
       System.out.println(str1.equalsIgnoreCase(str2)?"Both string1 and string2 are equal":"Both String1 and string2 are not equal");
      
//       (e) Convert characters in str1 to upper case and display new string
       System.out.println("string1 in upper case :"+str1.toUpperCase());
      
//       (f) Convert characters in str2 to lower case and display new string 2020
       System.out.println("string2 in lower case :"+str2.toLowerCase());
      
//       (g) Extract the first and last characters in str1, extract the 2nd character from the front and the 2nd character from the end in str2;
//       put these 4 characters together to create a new string and display
       String newString = str1.charAt(0)+""+str1.charAt(str1.length()-1)+""+str2.charAt(1)+""+str2.charAt(str2.length()-2);
       System.out.println("new string after extract requrired characters : "+newString);
      
//       (h) Extract the first words and the last words from both str1 and str2.
//       Combine these words to create a new string. The words should be separated by white space. Display this new string
       String str1words[] = str1.split(" ");
       String str2words[] = str2.split(" ");
       String newString2 = str1words[0]+" "+str1words[str1words.length-1]+" "+str2words[0]+" "+str2words[str2words.length-1];
       System.out.println("new string after extract requrired string : "+newString2);
      
////       (d) Compare str1 with str2 to check which string is smaller; display the smaller string first:
       System.out.println("Compare str1 with str2 to check which string is smaller;");
       int value = str1.compareTo(str2);
       if(value<0){
           System.out.println("smaller string is :"+str1);
       }else if(value>0){
           System.out.println("smaller string is :"+str2);
       }else{
           System.out.println("both are equal");
       }
   }
}