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1
7
8 package com.sun.jmx.mbeanserver;
9
10 import java.util.ArrayList  ;
11 import java.util.Collection ;
12 import java.util.Collections ;
13 import java.util.Comparator ;
14 import java.util.HashMap ;
15 import java.util.HashSet ;
16 import java.util.IdentityHashMap ;
17 import java.util.LinkedHashMap ;
18 import java.util.List ;
19 import java.util.Map ;
20 import java.util.Set ;
21 import java.util.SortedMap ;
22 import java.util.TreeMap ;
23
24 public class Util {
25 static <K, V> Map <K, V> newMap() {
26 return new HashMap <K, V>();
27 }
28
29 static <K, V> Map <K, V> newSynchronizedMap() {
30 return Collections.synchronizedMap(Util.<K, V>newMap());
31 }
32
33 static <K, V> IdentityHashMap <K, V> newIdentityHashMap() {
34 return new IdentityHashMap <K, V>();
35 }
36
37 static <K, V> Map <K, V> newSynchronizedIdentityHashMap() {
38 Map <K, V> map = newIdentityHashMap();
39 return Collections.synchronizedMap(map);
40 }
41
42 static <K, V> SortedMap <K, V> newSortedMap() {
43 return new TreeMap <K, V>();
44 }
45
46 static <K, V> SortedMap <K, V> newSortedMap(Comparator <? super K> comp) {
47 return new TreeMap <K, V>(comp);
48 }
49
50 static <K, V> Map <K, V> newInsertionOrderMap() {
51 return new LinkedHashMap <K, V>();
52 }
53
54 static <E> Set <E> newSet() {
55 return new HashSet <E>();
56 }
57
58 static <E> Set <E> newSet(Collection <E> c) {
59 return new HashSet <E>(c);
60 }
61
62 static <E> List <E> newList() {
63 return new ArrayList <E>();
64 }
65
66 static <E> List <E> newList(Collection <E> c) {
67 return new ArrayList <E>(c);
68 }
69
70
79 @SuppressWarnings ("unchecked")
80 public static <T> T cast(Object x) {
81 return (T) x;
82 }
83 }
84 |
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