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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. private static class Song implements Comparable<Song>{
  11. 		public Song(int sno, String name, String artist) {
  12. 			this.sno = sno;
  13. 			this.name = name;
  14. 			this.artist = artist;
  15. 		}
  16. 		private Integer sno;
  17. 		private String name;
  18. 		private String artist;
  19.  
  20. 		public String toString()
  21. 		{
  22. 			return sno + "\t" + name + "\t" + artist;
  23. 		}
  24.  
  25. 		@Override
  26. 		public int compareTo(Song arg0) {
  27. 			// TODO Auto-generated method stub
  28. 			return 0;
  29. 		}
  30. 		public static final Comparator<Song> NAMEComparator = new Comparator<Song>(){
  31.  
  32. 	        @Override
  33. 	        public int compare(Song o1, Song o2) {
  34. 	            return o1.name.compareTo(o2.name); // salary is also positive integer
  35. 	        }
  36.  
  37. 	    };
  38. 	    public static final Comparator<Song> ARTISTComparator = new Comparator<Song>(){
  39.  
  40. 	        @Override
  41. 	        public int compare(Song o1, Song o2) {
  42. 	            return o1.artist.compareTo(o2.artist); // salary is also positive integer
  43. 	        }
  44.  
  45. 	    };
  46.  
  47.  
  48.  
  49.  
  50. 	}
  51.  
  52. 	public static void main(String[] args) {
  53.  
  54. 		ArrayList<Song> list = new ArrayList<Song>();
  55. 		list.add(new Song(1, "The Best Of Me", "Bryan Adams"));
  56. 		list.add(new Song(2, "I'm Ready", "Bryan Adams"));
  57. 		list.add(new Song(3, "Cloud Number Nine", "Bryan Adams"));
  58.  
  59.  
  60. 		list.add(new Song(4, "Leave out", "Linkin Park"));
  61. 		list.add(new Song(5, "What I've Done", "Linkin Park"));
  62. 		list.add(new Song(6, "In the end", "Linkin Park"));
  63.  
  64. 		list.add(new Song(7, "Hey You", "Pink Floyd"));
  65. 		list.add(new Song(8, "Another Brick in the Wall", "Pink Floyd"));
  66. 		list.add(new Song(9, "Comfortably Numb", "Pink Floyd"));
  67. 		list.add(new Song(10, "Hey You", "Bryan Adams"));
  68. 		System.out.println("\nOriginal List:");
  69. 		for(Song s : list){
  70. 			System.out.println(s.toString());
  71. 		}
  72.  
  73.  
  74. 		list.sort(Song.ARTISTComparator);
  75. 		System.out.println("\nSorted by Artist");
  76. 		for(Song s : list){
  77. 			System.out.println(s.toString());
  78. 		}
  79.  
  80. 		list.sort(Song.NAMEComparator);
  81. 		System.out.println("\nSorted by Name");
  82. 		for(Song s : list){
  83. 			System.out.println(s.toString());
  84. 		}
  85.  
  86. 	}
  87. }
Success #stdin #stdout 0.04s 4386816KB
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stdin
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Standard input is empty
stdout
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Original List:
1	The Best Of Me	Bryan Adams
2	I'm Ready	Bryan Adams
3	Cloud Number Nine	Bryan Adams
4	Leave out	Linkin Park
5	What I've Done	Linkin Park
6	In the end	Linkin Park
7	Hey You	Pink Floyd
8	Another Brick in the Wall	Pink Floyd
9	Comfortably Numb	Pink Floyd
10	Hey You	Bryan Adams

Sorted by Artist
1	The Best Of Me	Bryan Adams
2	I'm Ready	Bryan Adams
3	Cloud Number Nine	Bryan Adams
10	Hey You	Bryan Adams
4	Leave out	Linkin Park
5	What I've Done	Linkin Park
6	In the end	Linkin Park
7	Hey You	Pink Floyd
8	Another Brick in the Wall	Pink Floyd
9	Comfortably Numb	Pink Floyd

Sorted by Name
8	Another Brick in the Wall	Pink Floyd
3	Cloud Number Nine	Bryan Adams
9	Comfortably Numb	Pink Floyd
10	Hey You	Bryan Adams
7	Hey You	Pink Floyd
2	I'm Ready	Bryan Adams
6	In the end	Linkin Park
4	Leave out	Linkin Park
1	The Best Of Me	Bryan Adams
5	What I've Done	Linkin Park
https://ideone.com/UJOdbn
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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