public class TestArgsWords {
public static void main(String[] args) {
Map m = new HashMap();
for(int i = 0; i < args.length; i++) {
int freq = ((Integer) m.get(args[i]) == null 0 : (Integer) m.get(args[i]));
m.put(args[i], (freq == 0 1 : freq + 1));
System.out.println
(m.size() + " distinct words detected:");
System.out.println(m);
}
}
摘自 Yours风之恋