Question

Analyze the following code.

public class Test {
int x;

public Test(String t) {
System.out.println("Test");
}
public static void main(String[ ] args) {
Test test = null;
System.out.println(test.x);
}
}

The program has a compile error because x has not been initialized.
The program has a runtime NullPointerException because test is null while executing test.x.
The program has a compile error because test is not initialized.
The program has a compile error because Test does not have a default constructor.

Answer 1

The correct answer for the given question is "The program has a runtime NullPointerException because test is null while executing test.x"

Step-by-step explanation:

In this code their is run time exception will occur in Main method i.e "java.lang.NullPointerException "because the object of the Test class i.e test will initialized by "null" .So on executing the statement test.x it gives an Runtime Exception.The "NullPointerException" can occur if we assign the object to the "null" value that why it produce an java.lang.NullPointerException