Home/ Questions/Q 7569463
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-30T15:10:18+00:00

I have a doubt about null assigning to variable in Java. In my program

  • 0

I have a doubt about null assigning to variable in Java. In my program I have assigned null to String variable as String str_variable = null;. For the learning purpose i assigned null integer variable as int int_variable = null; It shows error Add cast with Integer. So that rewrite the above int declaration as Integer int_variable = null;. This does not shows errors. I do not know the reason of these two kind of declaration.

Please the difference between to me.

String str_variable = null;

int int_variable = null; // error.

Integer int_variable1 = null; // no error.
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    String and Integer are both classes, in a way they are not native data types that is why it is always okay for you to set null as an initial value, however for int you must always initialize it with a number, one good way to find out their appropriate initialization value is to create variables outside your main(), example String var1; int var2; then use System.out.println(var1); System.out.println(var2); within the main()
    to see what was placed as an initial value when you run the program.

    • 0