Merge pull request TheAlgorithms#79 from hgm1284/contribution

HexaDecimal To Binary conversion created

Author: AnupKumarPanwar

Conversions/HexaDecimalToBinary.java

@@ -0,0 +1,37 @@
+import java.lang.StringBuilder;
+import java.util.*;
+import java.util.Scanner;
+import javax.swing.*;
+
+public class HexaToBin {
+ 
+    private final int LONG_BITS = 8;
+
+    public void convert(String numHex) {
+        //String a HexaDecimal:
+        int conHex = Integer.parseInt(numHex, 16);
+        //Hex a Binary:
+        String binary = Integer.toBinaryString(conHex);
+        //Presentation:
+        System.out.println(numHex + " = " + completeDigits(binary));
+    }
+
+    public String completeDigits(String binNum) {
+        for (int i = binNum.length(); i < LONG_BITS; i++) {
+            binNum = "0" + binNum;
+        }
+        return binNum;
+    }
+
+    public static void main(String[] args) {
+
+        //Testing Numbers:
+        String[] hexNums = {"1", "A1", "ef", "BA", "AA", "BB",
+            "19", "01", "02", "03", "04"};
+        Convert objConvert = new Convert();
+
+        for (String num : hexNums) {
+            objConvert.convert(num);
+        }
+    }
+}