Top "Nullpointerexception" questions

Java code evaluation (IntelliJ IDE), use toString() in some point?

When evaluating object initialization, toString nullPointerException appear. Method threw 'java.lang.NullPointerException' exception. Cannot evaluate XXXX.toString() Code example which …

java intellij-idea nullpointerexception

java.util.concurrent.ExecutionException: java.lang.NullPointerException Error

The following code snippet doesnt throw any error when executed in a standalone mode. When I deploy this into a …

java nullpointerexception callable

getActionBar() returns Null (AppCompat-v7 21)

My app is crashing the minute I run it after I changed my AppCompat-v7 to 21.0.0 and Compiled with no problem. …

android nullpointerexception android-appcompat

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference

I have BitmapScalingHelper.java: public class BitmapScalingHelper { public static Bitmap decodeResource(Resources res, int resId, int dstWidth, int dstHeight) { Options …

android android-activity nullpointerexception android-bitmap

Exception-" java.lang.NullPointerException: Module 'null' not found " in Java-Struts 1.3

While deplyoing Struts 1.3 Login application on localhost 8080 (Apache Tomcat 6.0.16 Server). I am getting following error. HTTP Status 500 - type Exception …

java nullpointerexception struts-1

Null pointer error with hideSoftInputFromWindow

I get a null pointer exception at this row: public void hideKeyboard(){ InputMethodManager inputManager = (InputMethodManager) this.getSystemService(Context.INPUT_METHOD_…

android nullpointerexception

Java: How to check for null pointers efficiently

There are some patterns for checking whether a parameter to a method has been given a null value. First, the …

java optimization coding-style nullpointerexception

Why comparing Integer with int can throw NullPointerException in Java?

It was very confusing to me to observe this situation: Integer i = null; String str = null; if (i == null) { //Nothing …

java nullpointerexception boxing

java.lang.Class java.lang.Object.getClass()' on a null object reference

I try to use viewPager with the tablayout but when i set adapter with the view pager i'm getting error "…

android xml nullpointerexception android-viewpager

Catching exceptions thrown from native code running on Android

The project I'm currently working on requires me to code up the android portion of a cross platform program implementation. …

android exception-handling java-native-interface android-ndk nullpointerexception