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june 12 tcs cpa java coding question.

Create a class song with the below attributes.
songId=int
title=String
artist=String
duration=double

the above attributes should be private  write getter and setter
and parametrized constructor as required .

create class cpa12june with main method.

Implement two static methods -
 findSongDurationForArtist and
getSongsInAscendingOrder in cpa12june class.

findSongDurationForArtist method- this method will take two
input parameters -array of Song objects and String parameter.
The method will  return the sum of the song duration from the
array of the Song objects for the given artists(Sttring parameter
passed).
  if no song with the given artist is present  in the array of Song
objects.then the method should return zero.

getSongsInAscendingOrder method-
   this method will take 2 input parameters-array of the  Song
objects and the String parameter.
this method will return Song object array in an ascending
order of their duration ,from the array of Song objects
whose artist attribute matches with the input String parameter.
   if no Song  with the given artist is present in the array
of the Song objects, then the method should return null.

for findSongDurationForArtist method- The main method should
print  the sum of the duration of artist as it is, if the returned
value is greater than 0, or it should print "There are no songs
with given artist".

for getSongsInAscendingOrder method-
                      the main method should print the songId
And title of each Song object from the returned song object
array if the returned value is not null.
if the returned value is null  then it should print "There  are
no songs with given artist".



input1:
2150
In Time
Justin Timberlake
4
250
Cry Me
Justin Timberlake
3
1200
Mirrors
Justin Timberlake
5
1300
That's the way it is
Celion Dion
5
500
Ashes
celion Dion
3
Celion Dion
Justin Timberlake

Output1:
8.0
250
Cry Me
2150
In Time
1200
Mirrors


input 2:
2150
Cry Me
Justin Timberlake
3
1000
Why Not
Enrique Iglesius
5
1200
Mirrors
Justin Timberlake
5
1300
That's the way it is
Celion Dion
5
500
Ashes
celion Dion
3
Bryan Adams
Michael Larkson

output 2:
There are no songs with given artist
There are no songs with given artist


 

 code:

 



import java.util.Arrays;
import java.util.Scanner;

public class cpa12june {
    public static void main(String[] args) {
        Song[] songs=new Song[5];
        Scanner sc=new Scanner(System.in);
        for (int i = 0; i <songs.length ; i++) {
            int a=sc.nextInt();
            sc.nextLine();
            String b=sc.nextLine();
            String c=sc.nextLine();
            double d=sc.nextDouble();
            sc.nextLine();
            songs[i]=new Song(a,b,c,d);
        }
        String input1=sc.nextLine();
        String input2=sc.nextLine();

          double ans1=findSongDurationForArtist(songs,input1);
          if(ans1==0)
          {
              System.out.println("There is no songs with given artist");
          }
          else
          {
              System.out.println(ans1);
          }

        Song[] ans2=  getSongsInAscendingOrder(songs,input2);
          if(ans2==null)
          {
              System.out.println("There are no songs with given artist");
          }
          else
          {
              for (int i = 0; i <ans2.length ; i++) {
                  System.out.println(ans2[i].songId);
                  System.out.println(ans2[i].title);
              }
          }

    }


    public static double findSongDurationForArtist(Song[] songs,String input1)
    {
        double sum=0;
        int count=0;
        for (int i = 0; i <songs.length ; i++) {
            if(songs[i].artist.equalsIgnoreCase(input1))
            {
                count=count+1;
                sum=sum+songs[i].duration;
            }
        }
        if(count>0)
        {
            return sum;
        }
    return 0;


    }





    public static Song[] getSongsInAscendingOrder(Song[] songs,String input2)
    {
        Song[] help=new Song[0];
        for (int i = 0; i <songs.length ; i++) {
            if(songs[i].artist.equalsIgnoreCase(input2))
            {
                help= Arrays.copyOf(help,help.length+1);
                help[help.length-1]=songs[i];
            }
        }

        //bubble sort
        for (int i = 0; i <help.length-1 ; i++) {
            for (int j = 0; j <help.length-i-1 ; j++) {
                if(help[j].duration>help[j+1].duration)
                {
                    Song temp=help[j];
                    help[j]=help[j+1];
                    help[j+1]=temp;
                }
            }
        }

        if(help.length>0)
        {
            return help;
        }

        return null;
    }


}




class Song
{
    int songId;
    String title;
    String artist;
    double duration;

    //parametrized constructor


    public Song(int songId, String title, String artist, double duration) {
        this.songId = songId;
        this.title = title;
        this.artist = artist;
        this.duration = duration;
    }
}

 

 

 

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