[Java, NullPointerException] miert nem jo a kovetkezo kod (Boxing and unboxing) ?

feladat:

Implement a method for converting a Long value to int (primitive type) according to the following rules:

if the given value is null the method should return the default value for ints;

if the given value is greater than Integer.MAX_VALUE the method should return the max value for ints;

if the given value is lesser than Integer.MIN_VALUE the method should return the min value for ints;

otherwise, the method should return the same value as the passed argument.

import java.util.Scanner;

public class Main {

public static int convert(Long val) {

// write your code here

if( "null".equals(val) ){

return 0;

} else if(val > Integer.MAX_VALUE){

return Integer.MAX_VALUE;

} else if( val < Integer.MIN_VALUE){

return Integer.MIN_VALUE;

}else{

return val.intValue();

}

}

/* Do not change code below */

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

String val = scanner.nextLine();

Long longVal = "null".equals(val) ? null : Long.parseLong(val);

System.out.println(convert(longVal));

}

}

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