MutableInteger


1   // Copyright (c) 2003-2007, Jodd Team (jodd.sf.net). All Rights Reserved.
2   
3   package jodd.mutable;
4   
5   /**
6    * A mutable <code>int</code> wrapper.
7    */
8   public final class MutableInteger extends Number   implements Comparable   {
9   
10  
11      public MutableInteger() {
12          super();
13      }
14  
15      public MutableInteger(int value) {
16          super();
17          this.value = value;
18      }
19  
20      public MutableInteger(String   value) {
21          this(Integer.parseInt(value));
22      }
23  
24      // ---------------------------------------------------------------- value
25  
26      /**
27       * The mutable value.
28       */
29      public int value;
30  
31      /**
32       * Returns mutable value.
33       */
34      public int getValue() {
35          return value;
36      }
37  
38      /**
39       * Sets mutable value.
40       */
41      public void setValue(int value) {
42          this.value = value;
43      }
44  
45      /**
46       * Sets mutable value from a Number.
47       */
48      public void setValue(Number   value) {
49          this.value = value.intValue();
50      }
51  
52      // ---------------------------------------------------------------- object
53  
54      /**
55       * Stringify the value.
56       */
57      public String   toString() {
58          return Integer.toString(value);
59      }
60  
61      /**
62       * Returns a hashcode for this value.
63       */
64      public int hashCode() {
65          return value;
66      }
67  
68      /**
69       * Compares this object to the specified object.
70       *
71       * @param obj the object to compare with.
72       * @return <code>true</code> if the objects are the same;
73       *         <code>false</code> otherwise.
74       */
75      public boolean equals(Object   obj) {
76          if (obj != null) {
77              if (obj instanceof Integer  ) {
78                  return value == ((Integer  ) obj).intValue();
79              }
80              if (obj instanceof MutableInteger) {
81                  return value == ((MutableInteger) obj).value;
82              }
83          }
84          return false;
85      }
86  
87      // ---------------------------------------------------------------- number
88  
89      /**
90       * Returns the value as a int.
91       */
92      public int intValue() {
93          return value;
94      }
95  
96      /**
97       * Returns the value as a long.
98       */
99      public long longValue() {
100         return value;
101     }
102 
103     /**
104      * Returns the value as a float.
105      */
106     public float floatValue() {
107         return value;
108     }
109 
110     /**
111      * Returns the value as a double.
112      */
113     public double doubleValue() {
114         return value;
115     }
116 
117     // ---------------------------------------------------------------- compare
118 
119     /**
120      * Comares value of two same instances.
121      */
122     public int compareTo(Object   obj) {
123         MutableInteger other = (MutableInteger) obj;
124         return value < other.value ? -1 : (value == other.value ? 0 : 1);
125     }
126 }
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