JAVA_容器API_Collection

 1 import java.util.*;
 2 
 3 public class BasicContainer {
 4     public static void main(String[] args) {
 5         Collection c = new HashSet();
 6         c.add("hello");
 7         c.add(new Name("f1","l1"));
 8         c.add(new Integer(100));
 9         c.remove("hello"); 
10         c.remove(new Integer(100));
11         System.out.println
12                   (c.remove(new Name("f1","l1")));
13         System.out.println(c);
14     }
15 
16 
17 }
18 
19 class Name implements Comparable {
20     private String firstName,lastName;
21     public Name(String firstName, String lastName) {
22         this.firstName = firstName; this.lastName = lastName;
23     }
24     public String getFirstName() {  return firstName;   }
25     public String getLastName() {   return lastName;   }
26     public String toString() {  return firstName + " " + lastName;  }
27     
28     public boolean equals(Object obj) {
29         if (obj instanceof Name) {
30             Name name = (Name) obj;
31             return (firstName.equals(name.firstName))
32                 && (lastName.equals(name.lastName));
33         }
34         return super.equals(obj);
35         }
36         public int hashCode() {
37             return firstName.hashCode();
38         }
39         
40         
41         
42         public int compareTo(Object o) {
43         Name n = (Name)o;
44         int lastCmp = 
45             lastName.compareTo(n.lastName);
46         return 
47              (lastCmp!=0 ? lastCmp :
48               firstName.compareTo(n.firstName));
49     }
50         
51 }