Choose all the lines which if inserted independently instead of "//insert code h

Discussion Forum : Declaration And Access Control

Question - Choose all the lines which if inserted independently instead of "//insert code here" will allow the following code to compile:
public class Test{
public static void main(String args[]){
add();
add(1);
add(1, 2);
}
// insert code here
}

Options:

A . void add(Integer... args){}

B . static void add(int... args, int y){}

C . static void add(int args...){}

D . static void add(int[]... args){}

E . static void add(int...args){}

Answer: Option E
var-args = variable number of arguments = 0 or many
void add(Integer... args){} is correct IF made "static" as it's called from a static context: main().
Var-args can be of both object(eg Integer) and primitive(eg int) types.
static void add(int... args, int y){} is correct IF its parameters' order is reversed.If a method has both var-arg(0 or MAX 1) + non-var-args(0 or more) parameters then the var-arg parameter MUST come LAST!
static void add(int args...){} : "..." must come after the type of the var-arg parameter, not after its name
static void add(int[]... args){} : for this to be a correct declaration then add() should have been called something like this: "add(arr);" or "add(arr, arr);" where "arr" could be defined as "int[] arr = new int[5];"
static void add(int...args){} is a valid way to define var-args (there is no need to have any space between "..." and the type and name of the var-arg param)

Was this answer helpful ?

Next Question

Discussion Forum : Declaration And Access Control

Submit Your Solution hear: