Failed to convert value of type 'java.lang.String' to required type 'int'; For input string: "load_form"] #4082 ...

What's the difference between an Integer and int in Java? Here we compare these two Java data types for usage, performance and when to choose an int or an Integer in your code.

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences (java.lang.String, int)' on a null object reference ...

This tutorial on how to use the Java Scanner for user input will quickly show you how to import java.util, take String, int, double and char input, and teach you the difference between the ...