Method.invoke() has thrown a NullPointerException

java.lang.NullPointerException
Javadoc
Thrown when an application attempts to use {@code null} in a case where an object is required. These include:
  • Calling the instance method of a {@code null} object.
  • Accessing or modifying the field of a {@code null} object.
  • Taking the length of {@code null} as if it were an array.
  • Accessing or modifying the slots of {@code null} as if it were an array.
  • Throwing {@code null} as if it were a {@code Throwable} value.

Applications should throw instances of this class to indicate other illegal uses of the {@code null} object. {@code NullPointerException} objects may be constructed by the virtual machine as if {@linkplain Throwable#Throwable(String, Throwable, boolean, boolean) suppression were disabled and/or the stack trace was not writable}. @author unascribed @since JDK1.0

at com.wenming.crashcachedemo.MainActivity$1.onClick
at android.view.View.performClick
(source)
at android.view.View$PerformClick.run
(source)
at android.os.Handler.handleCallback
(source)
at android.os.Handler.dispatchMessage
(source)
at android.os.Looper.loop
(source)
at android.app.ActivityThread.main
(source)
at java.lang.reflect.Method.invoke
(source)
7 frames hidden

Typical Exception Messages

  1. Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

Origin

ActivityThread.main() has thrown a NullPointerException

java.lang.NullPointerException
6 frames hidden
android.app.ActivityThread.main
55Web pages

Similar

Specific cases

External results for this pattern (31)

  1. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  2. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  3. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  4. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  5. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  6. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  7. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  8. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  9. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace
  10. wenmingvsvia GitHub1 year ago
    Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    Show stack trace