docs(Others): update countwords.java and crc32.java

- By @yanglbme

Others/crc32.java

@@ -1,27 +1,29 @@
 import java.util.BitSet;
 
-//Generates a crc32 checksum for a given string or byte array
-public class crc32 {
-    
+/**
+ * Generates a crc32 checksum for a given string or byte array
+ */
+public class CRC32 {
+
     public static void main(String[] args) {
         System.out.println(Integer.toHexString(crc32("Hello World")));
     }
-    
+
     public static int crc32(String str) {
         return crc32(str.getBytes());
     }
-    
+
     public static int crc32(byte[] data) {
         BitSet bitSet = BitSet.valueOf(data);
-        int crc32 = 0xFFFFFFFF;                           //initial value
-        for(int i=0;i<data.length*8;i++) {
-            if(((crc32>>>31)&1) != (bitSet.get(i)?1:0))
-                crc32 = (crc32 << 1) ^ 0x04C11DB7;        //xoring with polynomial
+        int crc32 = 0xFFFFFFFF; // initial value
+        for (int i = 0; i < data.length * 8; i++) {
+            if (((crc32 >>> 31) & 1) != (bitSet.get(i) ? 1 : 0))
+                crc32 = (crc32 << 1) ^ 0x04C11DB7; // xor with polynomial
             else
                 crc32 = (crc32 << 1);
         }
-        crc32 = Integer.reverse(crc32);                   //result reflect
-        return crc32 ^ 0xFFFFFFFF;                        //final xor value
+        crc32 = Integer.reverse(crc32); // result reflect
+        return crc32 ^ 0xFFFFFFFF; // final xor value
     }
 
 }