Question

Write a full program that will accept any number of command line arguments and print them to the screen.

Suppose your program is called Print.java.

When the command java Print hello goodbye you is run, the output will be

hello

goodbye

you

Write a full program that will accept exactly  three command line arguments that can be interpreted as integers, and will add them up. If there aren't exactly 3 command line arguments, print an error message and terminate the program.

Suppose your program is called Add.java.

Then running the command java Add 1 2 3 will output 6, and running java Add, for example, will cause the program to shut down.

Consider the following recursive method:

public static int mystery (int n) {

   if (n ==0)

   return 1;

   else

return 2 * mystery(n-1);

}

What is returned by a call to mystery(7)?

What is computed by the mystery method?

Answer 1

Answer:

As multiple questions are there, answering the first one as per guidelines to me

Explanation:

All the command line arguments are stored in the array args which is default passed in main method.

So, using a for loop and iterating till the args.length , printing each argument in new line.

Code:

class Print

{

public static void main(String[] args) {

for(int i=0; i<args.length; i++)

{

System.out.println(args[i]);

}

}

}

saved Print.java class Print 1 public static void main(String[] args) { for(int i=0; i<args.length; i++) Ovo AWN System.out.println(args[i]); 11 }

Output:

> javac Print.java > java Print hello goodbye you hello goodbye you

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