Top "Instanceof" questions

How to efficiently check if variable is Array or Object (in NodeJS & V8)?

Is there any way to efficiently check if the variable is Object or Array, in NodeJS & V8? I'm writing …

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Any reason to prefer getClass() over instanceof when generating .equals()?

I'm using Eclipse to generate .equals() and .hashCode(), and there is an option labeled "Use 'instanceof' to compare types". The …

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instanceof Vs getClass( )

I see gain in performance when using getClass() and == operator over instanceOf operator. Object str = new Integer("2000"); long starttime = System.…

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The performance impact of using instanceof in Java

I am working on an application and one design approach involves extremely heavy use of the instanceof operator. While I …

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How to see if an object is an array without using reflection?

How can I see in Java if an Object is an array without using reflection? And how can I iterate …

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Why does instanceof return false for some literals?

"foo" instanceof String //=> false "foo" instanceof Object //=> false true instanceof Boolean //=> false true instanceof Object //=> false …

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How to perform runtime type checking in Dart?

Dart specification states: Reified type information reflects the types of objects at runtime and may always be queried by dynamic …

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How to test if one java class extends another at runtime?

How to I test if a is a subclass of b? Class<?> a = A.class; Class<?> …

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Is there something like instanceOf(Class<?> c) in Java?

I want to check if an object o is an instance of the class C or of a subclass of …

java reflection instanceof

Test if object is instanceof a parameter type

Is there a way to determine if an object is an instance of a generic type? public <T> …

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