testargswords.java

这是上学堂马士兵老师教授的javaSE的所有源代码

import java.util.*;
public class TestArgsWords {
  //private static final Integer ONE = new Integer(1);
  private static final int ONE = 1;
  public static void main(String args[]) {
    Map m = new HashMap();
    for (int i = 0; i < args.length; i++) {
      //Integer freq = (Integer) m.get(args[i]);
      
      int freq = (Integer) m.get(args[i]) == null ? 0 : (Integer) m.get(args[i]);
      //m.put(args[i],(freq == null? ONE : new Integer(freq.intValue() + 1)));
      m.put(args[i], freq==0 ? ONE : freq + 1);
    }
    System.out.println
        (m.size() + " distinct words detected:");
    System.out.println(m);
  }
}