Added Frequency.java file

Author: abhijeet49

Frequency.java

@@ -0,0 +1,30 @@
+import java.util.*;
+class Frequency{
+	public static void main(String args[]){
+		Scanner sc=new Scanner(System.in);
+		ArrayList<Integer>Digits=new ArrayList<Integer>();
+		int input[]=new int[4];
+		int i, temp, result;
+		for(i=0;i<4;i++)
+			input[i]=sc.nextInt();
+		for(i=0;i<4;i++){
+			while(input[i]>0){
+				Digits.add(input[i]%10);
+				input[i]=input[i]/10;
+			}
+		}
+		temp=Collections.frequency(Digits,Digits.get(0));
+		result=Digits.get(0);
+		for(i=1;i<Digits.size();i++){
+			if(temp<Collections.frequency(Digits,Digits.get(i))){
+				temp=Collections.frequency(Digits,Digits.get(i));
+				result=Digits.get(i);
+			}
+			else if(temp==Collections.frequency(Digits,Digits.get(i))&& Digits.get(i)>result){
+				temp=Collections.frequency(Digits,Digits.get(i));
+				result=Digits.get(i);
+			}
+		}
+		System.out.println(result);
+	}
+}