michaelpass · July 30, 2019 18:59 · Jul 30, 2019
diff --git a/binaryStringtoHex.java b/binaryStringtoHex.java
@@ -0,0 +1,63 @@
+import java.io.*;
+
+private static void convertFileOutputToHex(String fileName) throws IOException {
+
+        ArrayList<String> programLines = new ArrayList<>();
+        try {
+            FileReader fr = new FileReader(fileName);
+            BufferedReader br = new BufferedReader(fr);
+            while (br.ready()) {
+                programLines.add(br.readLine());
+            }
+        } catch (IOException e) {
+            System.out.println("Error - Cannot find binary string input file.");
+        }
+
+        FileWriter fw = new FileWriter("prog.hex");
+        for (String line : programLines) {
+
+            // Pad with leading 0's until
+            while((line.length() % 4) != 0){
+                line = "0" + line;
+            }
+
+            // Convert binary digits to hex 4 at a time.
+            String hexStringToPrint = "";
+            for(int n = 0; n < line.length(); n = n + 4){
+
+                // Construct quadlet
+               String quadlet = String.valueOf(line.charAt(n + 0)) + String.valueOf(line.charAt(n + 1))
+                                + String.valueOf(line.charAt(n + 2)) + String.valueOf(line.charAt(n + 3));
+
+               hexStringToPrint = hexStringToPrint + convertBinaryToHex(quadlet);
+            }
+
+            fw.write(hexStringToPrint);
+            fw.write("\n");
+        }
+        fw.close();
+    }
+
+    private static String convertBinaryToHex(String binaryQuad){
+
+        Map<String, String> hexLookUpTable = new HashMap<>();
+
+        hexLookUpTable.put("0000", "0");
+        hexLookUpTable.put("0001", "1");
+        hexLookUpTable.put("0010", "2");
+        hexLookUpTable.put("0011", "3");
+        hexLookUpTable.put("0100", "4");
+        hexLookUpTable.put("0101", "5");
+        hexLookUpTable.put("0110", "6");
+        hexLookUpTable.put("0111", "7");
+        hexLookUpTable.put("1000", "8");
+        hexLookUpTable.put("1001", "9");
+        hexLookUpTable.put("1010", "A");
+        hexLookUpTable.put("1011", "B");
+        hexLookUpTable.put("1100", "C");
+        hexLookUpTable.put("1101", "D");
+        hexLookUpTable.put("1110", "E");
+        hexLookUpTable.put("1111", "F");
+
+        return hexLookUpTable.get(binaryQuad);
+    }