In this program, we are going to share a Java program for Huffman coding with the output. If you are a Java beginner and want to start learning the Java programming, then keep your close attention in this tutorial as I am going to share how to write a Java program for Huffman coding with the output.
Copy the below Java program and execute it with the help of Javac compiler. At the end of this program, We have shared the output of this program.
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import java.util.PriorityQueue; import java.util.Scanner; import java.util.Comparator; class HuffmanNode { int data; char c; HuffmanNode left; HuffmanNode right; } class MyComparator implements Comparator<HuffmanNode> { public int compare(HuffmanNode x, HuffmanNode y) { return x.data - y.data; } } public class Huffman { public static void printCode(HuffmanNode root, String s) { if (root.left == null && root.right == null && Character.isLetter(root.c)) { System.out.println(root.c + ":" + s); return; } printCode(root.left, s + "0"); printCode(root.right, s + "1"); } public static void main(String[] args) { Scanner s = new Scanner(System.in); int n = 6; char[] charArray = { 'a', 'b', 'c', 'd', 'e', 'f' }; int[] charfreq = { 5, 9, 12, 13, 16, 45 }; PriorityQueue<HuffmanNode> q = new PriorityQueue<HuffmanNode>(n, new MyComparator()); for (int i = 0; i < n; i++) { HuffmanNode hn = new HuffmanNode(); hn.c = charArray[i]; hn.data = charfreq[i]; hn.left = null; hn.right = null; q.add(hn); } HuffmanNode root = null; while (q.size() > 1) { HuffmanNode x = q.peek(); q.poll(); HuffmanNode y = q.peek(); q.poll(); HuffmanNode f = new HuffmanNode(); f.data = x.data + y.data; f.c = '-'; f.left = x; f.right = y; root = f; q.add(f); } printCode(root, ""); } } |
f: 0
c: 100
d: 101
a: 1100
b: 1101
e: 111
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