Why should immutable classes be prefered against mutable classes? in what conditions a class should be designed as immutable?

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zuzupetal

  • Jan 30th, 2007
 

An immutable object is an object whose state cannot be modified after it is created while mutable object can be modified after it is created. An example is String and StringBuffer. My guess is immutable object is safer in state persistence purpose. However, sometimes, you prefer mutable object over immutable object to save the performance and memory problem.Zu

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zuzupetal

  • Jan 30th, 2007
 

An immutable object is an object whose state cannot be modified after it is created while mutable object can be modified after it is created. An example is String and StringBuffer. My guess is immutable object is safer in state persistence purpose. However, sometimes, you prefer mutable object over immutable object to save the performance and memory problem.Zu

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