Create WordCounter.java

Java program to count no of words from given input string.

Author: Raghav-Gupta22

WordCounter.java

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+public class demo {
+  
+    static final int OUT = 0;
+    static final int IN = 1;
+      
+    // returns number of words in str
+    static int countWords(String str)
+    {
+        int state = OUT;
+        int wc = 0;  // word count
+        int i = 0;
+         
+        // Scan all characters one by one
+        while (i < str.length())
+        {
+            // If next character is a separator, set the
+            // state as OUT
+            if (str.charAt(i) == ' ' || str.charAt(i) == '\n'
+                    || str.charAt(i) == '\t')
+                state = OUT;
+                 
+      
+            // If next character is not a word separator
+            // and state is OUT, then set the state as IN
+            // and increment word count
+            else if (state == OUT)
+            {
+                state = IN;
+                ++wc;
+            }
+      
+            // Move to next character
+            ++i;
+        }
+        return wc;
+    }
+      
+    // Driver program to test above functions
+    public static void main(String args[])
+    {
+        String str = "One two       three\n four\tfive  ";
+        System.out.println("No of words : " + countWords(str));
+    }
+}