What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?

Given:

11. class Converter {
12. public static void main(String[] args) {
13. Integer i = args[0];
14. int j = 12;
15. System.out.println("It is " + (j==i) + " that j==i.");
16. }
17. }



A. It is true that j==i.
B. It is false that j==i.
C. An exception is thrown at runtime.
D. Compilation fails because of an error in line 13.









Answer: D

Explanation :

The java command-line argument is an argument i.e. passed while running the java program.The arguments passed from the console is a String type argument and can be received in the java program and it can be used as an input.

In the above example "12" is passed as a String when we run - java Converter 12 .Now we are storing String - 12 in integer i without using static method Integer.parseInt(str) which leads to Compile Time Error > 

line no:5: incompatible types

found : java.lang.String
required: java.lang.Integer
Integer i = args[0];

Solution to the above problem is ,we need to use  Integer.parseInt(arg[0]) and then Store it in Integer i .