]]>
渚嬪錛?BR>
Counter c = new Counter();c.add("One");c.add("Two");c.add("One");c.get("One") // Result is 2;c.get("Two") // Result is 1;榪欎釜綾葷殑鍚嶅瓧涔熻闇瑕佽浠ヤ笅銆?BR>榪樻湁浠涔堥渶瑕佹敼榪涚殑鍦版柟錛屾垨鑰呰繕闇瑕佸摢浜涙柟娉曪紝璇峰ぇ瀹舵彁紺恒?BR>
瀹炵幇濡備笅錛?BR>
1package org.mstar.collection;
2
3import java.util.HashMap;
4import java.util.Iterator;
5import java.util.Map;
6
7
8
/**//**
9
* @author mty
10 *
11
*/
12public class Counter 
{
13 private Map map;
14
15
public Counter(){
16 map = new HashMap();
17
}
18
19 public void add(Object key){
20 if(map.containsKey(key)){
21 Integer i = (Integer)map.get(key);
22 int amount = i.intValue();
23 map.put(key,new Integer(++amount));
24 }else{
25 map.put(key,new Integer(1));
26 }
27 }
28
29 public void add(Object key,int amount){
30 if(map.containsKey(key)){
31 Integer i = (Integer)map.get(key);
32 int amount2 = i.intValue();
33 map.put(key,new Integer(amount+amount2));
34 }else{
35 map.put(key,new Integer(amount));
36 }
37 }
38
39 public Iterator iterator(){
40 return map.keySet().iterator();
41 }
42
43 public int getCount(Object key){
44 Integer i = (Integer)map.get(key);
45 return i.intValue();
46 }
47
48 public int[] countArray(){
49 int[] result = new int[map.size()];
50 Object[] keys = keyArray();
51 for(int i=0;i<result.length;i++){
52 result[i] = getCount(keys[i]);
53 }
54
55 return result;
56 }
57
58 public Object[] keyArray(){
59 return map.keySet().toArray();
60 }
61
62 public void remove(Object key){
63 if(map.containsKey(key)){
64 Integer i = (Integer)map.get(key);
65 int amount = i.intValue();
66 map.put(key,new Integer(amount<0?0:--amount));
67 }
68 }
69
70 public void remove(Object key,int amount){
71 if(map.containsKey(key)){
72 Integer i = (Integer)map.get(key);
73 int amount2 = i.intValue();
74 map.put(key,new Integer(amount2-amount<0?0:amount2-amount));
75 }
76 }
77
78 public int size(){
79 return map.size();
80 }
81}
package org.mstar.collection;2
3
import java.util.HashMap;4
import java.util.Iterator;5
import java.util.Map;6
7
8
/**//**9
* @author mty10
*11
*/12
public class Counter {13
private Map map;14
15
public Counter(){16
map = new HashMap();17
}18
19
public void add(Object key){20
if(map.containsKey(key)){21
Integer i = (Integer)map.get(key);22
int amount = i.intValue();23
map.put(key,new Integer(++amount));24
}else{25
map.put(key,new Integer(1));26
}27
}28
29
public void add(Object key,int amount){30
if(map.containsKey(key)){31
Integer i = (Integer)map.get(key);32
int amount2 = i.intValue();33
map.put(key,new Integer(amount+amount2));34
}else{35
map.put(key,new Integer(amount));36
}37
}38
39
public Iterator iterator(){40
return map.keySet().iterator();41
}42
43
public int getCount(Object key){44
Integer i = (Integer)map.get(key);45
return i.intValue();46
}47
48
public int[] countArray(){49
int[] result = new int[map.size()];50
Object[] keys = keyArray(); 51
for(int i=0;i<result.length;i++){52
result[i] = getCount(keys[i]);53
}54
55
return result;56
}57
58
public Object[] keyArray(){ 59
return map.keySet().toArray();60
}61
62
public void remove(Object key){63
if(map.containsKey(key)){64
Integer i = (Integer)map.get(key);65
int amount = i.intValue();66
map.put(key,new Integer(amount<0?0:--amount));67
} 68
}69
70
public void remove(Object key,int amount){71
if(map.containsKey(key)){72
Integer i = (Integer)map.get(key);73
int amount2 = i.intValue();74
map.put(key,new Integer(amount2-amount<0?0:amount2-amount));75
}76
}77
78
public int size(){79
return map.size();80
}81
}]]>