Singleton: Difference between revisions
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(→{{header|Java}}: Add Enum as a singleton) |
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public static Singleton getInstance() { |
public static Singleton getInstance() { |
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return LazyHolder.INSTANCE; |
return LazyHolder.INSTANCE; |
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} |
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}</syntaxhighlight> |
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===Thread-Safe Using Enum === |
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Enums in Java are fully-fledged classes with specific instances, and are an idiomatic way to create singletons. |
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<syntaxhighlight lang="java">public enum Singleton { |
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INSTANCE; |
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// Fields, constructors and methods... |
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private int value; |
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Singleton() { |
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value = 0; |
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} |
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public int getValue() { |
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return value; |
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} |
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public void setValue(int value) { |
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this.value = value; |
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} |
} |
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}</syntaxhighlight> |
}</syntaxhighlight> |
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