You are given the statement: String s1 = input.nextLine();//where input is a sca

Question

You are given the statement: String s1 = input.nextLine();//where input is a scanner object Assigning the user enters arbitrary tort as input: given the Java statement(s) required to compete the following tasks Determine and store in a variable me total number of characters in the String Determine and store in one String two copies of the first character in String $1 (i e., it the first character is 'a', the new string should be 'aa') Write a complete if statement that prints "I love COSC" if s1 is "I am happy!" Create a new stung s2 that contains only the last three characters of s1 (assume there are enough characters in s1 to accomplish this).

Explanation / Answer

1)

import java.util.Scanner;

public class ScannerDemo {

   public static void main(String[] args) {
       Scanner scanner=new Scanner(System.in);
       System.out.println("enter the string");
       String s1=scanner.nextLine();
       //to determine total no of characters in the string
       int count=s1.length();
       System.out.println("the total no of characters in the above entered string is "+count);
   }
}

output

enter the string
bob is a king maker
the total no of characters in the above entered string is 19

b)

import java.util.Scanner;

public class ScannerDemo {

   public static void main(String[] args) {
       Scanner scanner=new Scanner(System.in);
       System.out.println("enter the string");
       String s1=scanner.nextLine();
       //to store copy of the string
      
       String s2=s1.substring(0, 1);
   //to make duplicate string
       String s3=s2+s1;
       System.out.println("the duplicate string is "+ s3);
   }
}

output

enter the string
iam happy
the duplicate string is iiam happy

c)

import java.util.Scanner;

public class ScannerDemo {

   public static void main(String[] args) {
       Scanner scanner=new Scanner(System.in);
       System.out.println("enter the string");
       String s1=scanner.nextLine();
       if(s1.trim().equals("i am happy!"))
       {
           System.out.println("the string is "+"iam cosc");
       }else
           System.out.println("the original is "+s1);
   }
}

output

enter the string
i am happy!
the string is iam cosc

d)

import java.util.Scanner;

public class ScannerDemo {

   public static void main(String[] args) {
       Scanner scanner=new Scanner(System.in);
       System.out.println("enter the string");
       String s1=scanner.nextLine();
       int length=s1.length();
       String s2=s1.substring(length-3, length);
       System.out.println("the string is "+s2);
      
      
           }
}

output

enter the string
iam happy
the string is ppy

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