Question

Unit 5: Discussion - Part 2

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Question

Read the lecture for Chapter 5 and then answer the following:.

Present an ORIGINAL example of the correct use of the printf method. This example must show how integers, doubles and Strings are properly formatted for display. At least one integer, one double, and one String must be printed using printf. You are encouraged to consult the textbook and any other sources you deem relevant, but come up with an example of your own. Show a complete Java program and a screen capture with a sample output.

Answer 1

If you have any problem with the program feel free to comment

Program

class Song {//for storing the data of the songs
   //instance variables
   private String name, artist;
   private double playtime;
   private int year;
  
   //parameterized constructor
   public Song(String name, String artist, double playtime, int year) {
       this.name = name;
       this.artist = artist;
       this.playtime = playtime;
       this.year = year;
   }
  
   //getters
   public String getName() {
       return name;
   }

   public String getArtist() {
       return artist;
   }

   public double getPlaytime() {
       return playtime;
   }

   public int getYear() {
       return year;
   }

}

public class Test {//driver class
   public static void main(String[] args) {
       Song[] ar = new Song[5];
       //storing the list of song in the array
       ar[0] = new Song("Happy Together", "The Turtles", 2.57, 1967);
       ar[1] = new Song("Take on me", "a-ha", 3.50, 1985);
       ar[2] = new Song("Never gonna give you up", "Rick Astley", 3.33, 1987);
       ar[3] = new Song("Stand by me", "Ben E King", 2.58, 1961);
       ar[4] = new Song("Angel of the morning", "Juice Newton", 3.54, 1981);
      
       System.out.println("List of songs: ");
      
       for(Song i: ar) {//printing the list of songs using printf
           System.out.printf("Name: %s\n", i.getName());
           System.out.printf("Artist: %s\n", i.getArtist());
           System.out.printf("Playtime: %.2fmin\n", i.getPlaytime());//printing up to 2 decimal places
           System.out.printf("Year: %d\n", i.getYear());
           System.out.println();
       }
   }
}

Output