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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 */
package maps;

import java.util.*;

public class Freq {
    public static void main(String[] args) {
        System.out.println(Arrays.asList(args));
        
        Map<String, Integer> m = new LinkedHashMap<String, Integer>();

        // Initialize frequency table from command line
        for (String a : args) {
            Integer freq = m.get(a);
            m.put(a, (freq == null) ? 1 : freq + 1);
        }

        System.out.println(m.size() + " distinct words:");
        System.out.println(m);
    }
}

// The only tricky thing about this program is the second argument of the put
// statement. That argument is a conditional expression that has the effect of
// setting the frequency to one if the word has never been seen before or one
// more than its current value if the word has already been seen.

/* s for:
if(freq==null)
    m.put(a, 1);
else 
    m.put(a, freq +1);
*/