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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. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		int[] arr = {3, 2, 3, 2, 4, 3};
  13.  
  14. 		Map<Integer, Integer> freqMap = new HashMap<>();
  15. 		for (int num : arr) {
  16. 			freqMap.put(num, freqMap.getOrDefault(num, 0) + 1);
  17. 		}
  18.  
  19. 		int maxFreq = Integer.MIN_VALUE, minFreq = Integer.MAX_VALUE;
  20. 		int maxElem = -1, minElem = -1;
  21.  
  22. 		for (Map.Entry<Integer, Integer> entry : freqMap.entrySet()) {
  23. 			int elem = entry.getKey();
  24. 			int freq = entry.getValue();
  25.  
  26. 			if (freq > maxFreq) {
  27. 				maxFreq = freq;
  28. 				maxElem = elem;
  29. 			}
  30.  
  31. 			if (freq < minFreq) {
  32. 				minFreq = freq;
  33. 				minElem = elem;
  34. 			}
  35. 		}
  36.  
  37. 		System.out.println("Max Frequency Element: " + maxElem + ", Freq: " + maxFreq);
  38. 		System.out.println("Min Frequency Element: " + minElem + ", Freq: " + minFreq);
  39. 	}
  40. }
  41.  
Success #stdin #stdout 0.19s 57544KB
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Standard input is empty
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Max Frequency Element: 3, Freq: 3
Min Frequency Element: 4, Freq: 1
https://ideone.com/WkfyDK
language:
Java (HotSpot 12)
created:
6 hours ago
visibility:
public

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