Added in API level 1
NullPointerException
open class NullPointerException : RuntimeException
| kotlin.Any | ||||
| ↳ | kotlin.Throwable | |||
| ↳ | java.lang.Exception | |||
| ↳ | java.lang.RuntimeException | |||
| ↳ | java.lang.NullPointerException | |||
Thrown when an application attempts to use null in a case where an object is required. These include:
- Calling the instance method of a
nullobject. - Accessing or modifying the field of a
nullobject. - Taking the length of
nullas if it were an array. - Accessing or modifying the slots of
nullas if it were an array. - Throwing
nullas if it were aThrowablevalue.
Applications should throw instances of this class to indicate other illegal uses of the null object. NullPointerException objects may be constructed by the virtual machine as if stack trace was not writable.
Summary
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Constructs a |
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Constructs a |
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Public constructors
NullPointerException
Added in API level 1
NullPointerException()
Constructs a NullPointerException with no detail message.
NullPointerException
Added in API level 1
NullPointerException(s: String!)
Constructs a NullPointerException with the specified detail message.
| Parameters | |
|---|---|
s |
String!: the detail message. |