adding a java program to check occurance of char in string

Java/OccurenceOfCharInString.java

@@ -0,0 +1,44 @@
+// Java program to count frequencies of
+// characters in string using Hashmap
+
+class OccurenceOfCharInString {
+	static void characterCount(String inputString)
+	{
+		// Creating a HashMap containing char
+		// as a key and occurrences as a value
+		HashMap<Character, Integer> charCountMap
+			= new HashMap<Character, Integer>();
+
+		// Converting given string to char array
+
+		char[] strArray = inputString.toCharArray();
+
+		// checking each char of strArray
+		for (char c : strArray) {
+			if (charCountMap.containsKey(c)) {
+
+				// If char is present in charCountMap,
+				// incrementing it's count by 1
+				charCountMap.put(c, charCountMap.get(c) + 1);
+			}
+			else {
+
+				// If char is not present in charCountMap,
+				// putting this char to charCountMap with 1 as it's value
+				charCountMap.put(c, 1);
+			}
+		}
+
+		// Printing the charCountMap
+		for (Map.Entry entry : charCountMap.entrySet()) {
+			System.out.println(entry.getKey() + " " + entry.getValue());
+		}
+	}
+
+	// Driver Code
+	public static void main(String[] args)
+	{
+		String str = "Ajit";
+		characterCount(str);
+	}
+}