Exercise 1 Revision String

 1. 

public class StringExercise {

    public static void main (String[] args) {

        

 String college = new String ("College of Arts and Sciences");

 String town = new String (" UUM Sintok") ; // part (a)

 int stringLength;

 String change1, change2, change3;

 stringLength=college.length(); // part (b)

 System.out.println (college + " contains " + stringLength + " characters.");

 change1 = college.toUpperCase(); // part (c)

 System.out.println ("The string is all in upper case: " + change1);

 change2 = change1.replaceAll("O","*"); // part (d)

System.out.println ("All capital O's are replaced with the asterisk character: " + change2);

 change3 = college.concat (town) ; // part (e)

 System.out.println ("The final string is " + change3); 

     }

 }

2.  import java.util.Scanner;

public class FunnyStringExc{

    public static void main(String[] args) {

       Scanner sc = new Scanner (System.in);

       String color, food, animal, firstName;

       

       System.out.print("Enter your favourite colour: ");

       color = sc.next();

       System.out.print("Enter your favourite food: ");

       food = sc.next();

       System.out.print("Enter your favourite animal: ");

       animal = sc.next();

       System.out.print("Enter your friend first name: ");

       firstName = sc.next();

       

       String output1 = "I had a dream that ".concat(firstName);

       String output2 = output1.concat(" ate a ");

       String output3 = output2.concat (color + " ");

       String output4 = output3.concat(animal);

       String output5 = output4.concat(" and said it taste like a ");

       String output6 = output5.concat(food);

       String output7 = output6.concat("!");

       System.out.println(output7);

  

    }

    

}

3.  import java.util.Scanner;

public class Date {

    

    public static void main(String[] args) {

       String date;

       

       Scanner scan = new Scanner (System.in);

       System.out.print ("Enter a date in the format day/month/year: ");

       date = scan.next();

       

       String output1 = date.replace("/", ".");

       System.out.println(output1);

    }

    

}

 

4. import java.util.Scanner;

public class Digit {

    

    public static void main(String[] args) {

      Scanner sc = new Scanner(System.in);

     int num, sum = 0;

     System.out.printf("Enter any number: ");

     int num= Integer.parseInt();

     num = sc.next();

     

     

     while(num!=0)  

    {  

         

        sum += num % 10;

    }  

    String output1= num.charAt();

    System.out.printf("\nSum of digits = %d", sum);  

 

      }

}