java-algorithms/Counting_Sort.java at main · rishitydv/java-algorithms · GitHub

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classCountingSort {
voidsort(chararr[])
	{
intn = arr.length;

charoutput[] = newchar[n];

intcount[] = newint[256];
for (inti = 0; i < 256; ++i)
count[i] = 0;

// store count of each character
for (inti = 0; i < n; ++i)
 ++count[arr[i]];


for (inti = 1; i <= 255; ++i)
count[i] += count[i - 1];

// Build the output character array
for (inti = 0; i < n; ++i) {
output[count[arr[i]] - 1] = arr[i];
 --count[arr[i]];
 }

for (inti = 0; i < n; ++i)
arr[i] = output[i];
	}

// Driver method
publicstaticvoidmain(Stringargs[])
	{
CountingSortob = newCountingSort();
chararr[] = {'g', 'e', 'e', 'k', 's', 'f', 'o',
'r', 'g', 'e', 'e', 'k', 's' };

ob.sort(arr);

System.out.print("Sorted character array is ");
for (inti = 0; i < arr.length; ++i)
System.out.print(arr[i]);
	}
}