<JAVA PROGRAMMING> 1. How do tou prevent a class from being extended? How do pre

Question

<JAVA PROGRAMMING>

1. How do tou prevent a class from being extended? How do prevent a method from being overriden?

(single word answer)

---------------------------------------------------------------------------------------------------------

2. What will be displayed by the following code?

class Test {

public static void main (String[] args){

int[] list 1 = {3,2,1};

int[] list 2 = {1,2,3};

list 2 = list 1;

list1[0] = 0; list1[1] = 1; list2[2] = 2;

for (int i = list2.length - 1; i > = 0; i --)

System.out.print(list2[i] + "");

}

}

Explanation / Answer

Questoin 1:

to prevent a class from being extended,to prevent a method from being overriden we precede that class or method definition with the final attribute.

Example class:

final public class A {
}

Example method:

final public function m () {
}

Question 2:

Answer is : 210

list2 = list1; the values in list1 are same as value in list2 so if we change the value in list1 it will effect to list2 and vise versa

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