Package org.jfree.data
Class DefaultKeyedValue<K extends java.lang.Comparable<K>>
- java.lang.Object
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- org.jfree.data.DefaultKeyedValue<K>
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- Type Parameters:
K
- the key type (String
is a good default).
- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
,PublicCloneable
,KeyedValue<K>
,Value
public class DefaultKeyedValue<K extends java.lang.Comparable<K>> extends java.lang.Object implements KeyedValue<K>, java.lang.Cloneable, PublicCloneable, java.io.Serializable
A (key, value) pair. This class provides a default implementation of theKeyedValue
interface.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private K
key
The key.private static long
serialVersionUID
For serialization.private java.lang.Number
value
The value.
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Constructor Summary
Constructors Constructor Description DefaultKeyedValue(K key, java.lang.Number value)
Creates a new (key, value) item.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
clone()
Returns a clone.boolean
equals(java.lang.Object obj)
Tests this key-value pair for equality with an arbitrary object.K
getKey()
Returns the key.java.lang.Number
getValue()
Returns the value.int
hashCode()
Returns a hash code.void
setValue(java.lang.Number value)
Sets the value.java.lang.String
toString()
Returns a string representing this instance, primarily useful for debugging.
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Field Detail
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serialVersionUID
private static final long serialVersionUID
For serialization.- See Also:
- Constant Field Values
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value
private java.lang.Number value
The value.
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Constructor Detail
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DefaultKeyedValue
public DefaultKeyedValue(K key, java.lang.Number value)
Creates a new (key, value) item.- Parameters:
key
- the key (should be immutable,null
not permitted).value
- the value (null
permitted).
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Method Detail
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getKey
public K getKey()
Returns the key.- Specified by:
getKey
in interfaceKeyedValue<K extends java.lang.Comparable<K>>
- Returns:
- The key (never
null
).
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getValue
public java.lang.Number getValue()
Returns the value.
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setValue
public void setValue(java.lang.Number value)
Sets the value.- Parameters:
value
- the value (null
permitted).
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equals
public boolean equals(java.lang.Object obj)
Tests this key-value pair for equality with an arbitrary object.- Overrides:
equals
in classjava.lang.Object
- Parameters:
obj
- the object (null
permitted).- Returns:
- A boolean.
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hashCode
public int hashCode()
Returns a hash code.- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- A hash code.
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clone
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
Returns a clone. It is assumed that both the key and value are immutable objects, so only the references are cloned, not the objects themselves.- Specified by:
clone
in interfacePublicCloneable
- Overrides:
clone
in classjava.lang.Object
- Returns:
- A clone.
- Throws:
java.lang.CloneNotSupportedException
- Not thrown by this class, but subclasses (if any) might.
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toString
public java.lang.String toString()
Returns a string representing this instance, primarily useful for debugging.- Overrides:
toString
in classjava.lang.Object
- Returns:
- A string.
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