C# e Orientação a Objetos
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COLLECTIONS 152<br />
Exercícios de Fixação<br />
7 Vamos comparar o tempo do método Contains() das listas e dos conjuntos.<br />
1 using System ;<br />
2 using System . Collections . Generic ;<br />
3 using System . Diagnostics ;<br />
4<br />
5 public class TestaContains<br />
6 {<br />
7 static void Main ()<br />
8 {<br />
9 List arrayList = new List () ;<br />
10 HashSet hashSet = new HashSet () ;<br />
11<br />
12 long tempo = TestaContains . Contains ( arrayList );<br />
13 Console . WriteLine (" ArrayList : " + tempo + "ms");<br />
14<br />
15 tempo = TestaContains . Contains ( hashSet );<br />
16 Console . WriteLine (" HashSet : " + tempo + "ms");<br />
17<br />
18 }<br />
19<br />
20 public static long Contains ( ICollection colecao )<br />
21 {<br />
22 int size = 100000;<br />
23<br />
24 for ( int i = 0; i < size ; i ++)<br />
25 {<br />
26 colecao . Add (i);<br />
27 }<br />
28<br />
29 Stopwatch sw = new Stopwatch ();<br />
30 sw. Start ();<br />
31<br />
32 for ( int i = 0; i < size ; i ++)<br />
33 {<br />
34 colecao . Contains (i);<br />
35 }<br />
36<br />
37 sw. Stop ();<br />
38<br />
39 return sw. ElapsedMilliseconds ;<br />
40 }<br />
41 }<br />
Código <strong>C#</strong> 17.23: TestaContains.cs<br />
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