Java Collection接口

import java.util.*;

public class BasicContainer {
    public static void main(String[] args) {
        Collection c = new HashSet();
        c.add("hello");
        c.add(new Name("f1","l1"));
        c.add(new Integer(100));
        c.remove("hello");
        c.remove(new Integer(100));
        System.out.println
                  (c.remove(new Name("f1","l1")));
        System.out.println(c);
    }


}

class Name implements Comparable {
    private String firstName,lastName;
    public Name(String firstName, String lastName) {
        this.firstName = firstName; this.lastName = lastName;
    }
    public String getFirstName() { return firstName; }
    public String getLastName() { return lastName; }
    public String toString() { return firstName + " " + lastName; }

    public boolean equals(Object obj) {
     if (obj instanceof Name) {
     Name name = (Name) obj;
     return (firstName.equals(name.firstName))
     && (lastName.equals(name.lastName));
     }
     return super.equals(obj);
    }
        public int hashCode() {
         return firstName.hashCode();
        }



        public int compareTo(Object o) {
        Name n = (Name)o;
        int lastCmp =
            lastName.compareTo(n.lastName);
        return
             (lastCmp!=0 ? lastCmp :
              firstName.compareTo(n.firstName));
    }

}

课件： collection.pdf