Exception in thread "Thread-4" java.lang.NullPointerException in call the constructor
49
What is a NullPointerException, and how do I fix it?
55274
Java: Exception itself is null
80631
NullPointerException but compiling?
480
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
78183
Calling a class's constructor inside another class
66284
NullPointerException when Creating an Array of objects
18250
What could cause java.lang.reflect.InvocationTargetException?
33244
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException
137692
NullPointerException when working with arrays
33557
Java: starting a new thread in a constructor
58747
How can I pass a parameter to a Java Thread?
60420
Can constructors throw exceptions in Java?
2116
IllegalArgumentException or NullPointerException for a null parameter?
43630
Is Object constructor called when creating an array in Java?
96843
What will happen when I call a member function on a NULL object pointer?
18925
Why are my fields initialized to null or to the default value of zero when I've declared and initialized them in my class' constructor?
142525
How to treat exceptions in constructor best?