Free Programming Tutorials

“>This material was originally published for the 2002 JavaOne Conference.Josh: Last week’s first puzzler was to figure out what’s wrong with thisprogram:import java.util.*;public class Name { public static void main(String[] args) { Set s = new HashSet(); s.add(new Name(”Donald”, “Duck”)); System.out.println(s.contains(new Name(”Donald”, “Duck”))); } private String first, last; public Name(String first, String last) { if (first == null || last = 
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