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40 lines
1.3 KiB
Java
40 lines
1.3 KiB
Java
// Program demonstrating use of a map to count the frequency of words in a file.
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import java.io.File;
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import java.io.IOException;
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import java.util.Map;
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import java.util.Scanner;
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import java.util.TreeMap;
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public class SimpleWordCounter
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{
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public static void main(String[] args)
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{
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try
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{
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File f = new File("ciaFactBook2008.txt");
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Scanner sc;
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sc = new Scanner(f);
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// sc.useDelimiter("[^a-zA-Z']+");
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Map<String, Integer> wordCount = new TreeMap<String, Integer>();
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while(sc.hasNext())
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{
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String word = sc.next();
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if(!wordCount.containsKey(word))
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wordCount.put(word, 1);
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else
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wordCount.put(word, wordCount.get(word) + 1);
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}
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// show results
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for(String word : wordCount.keySet())
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System.out.println(word + " " + wordCount.get(word));
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System.out.println(wordCount.size());
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}
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catch(IOException e)
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{
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System.out.println("Unable to read from file.");
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}
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}
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}
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