Why command line arguments are used in Java - Test Your Understanding

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the first command line argument.

Java

public class Main {
    public static void main(String[] args) {
        System.out.println([1]);
    }
}

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Aargs

Bargs[0]

Cargs.length

Dargs.toString()

Attempts:

3 left

2fill in blank

medium

Complete the code to check if any command line arguments were passed.

Java

public class Main {
    public static void main(String[] args) {
        if ([1] > 0) {
            System.out.println("Arguments passed");
        } else {
            System.out.println("No arguments");
        }
    }
}

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Aargs.count

Bargs[0]

Cargs.size()

Dargs.length

Attempts:

3 left

3fill in blank

hard

Fix the error in the code to correctly print all command line arguments.

Java

public class Main {
    public static void main(String[] args) {
        for (int i = 0; i < [1]; i++) {
            System.out.println(args[i]);
        }
    }
}

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Aargs.length

Bargs.count()

Cargs.size()

Dargs.length()

Attempts:

3 left

4fill in blank

hard

Fill both blanks to create a program that sums two integer command line arguments.

Java

public class Main {
    public static void main(String[] args) {
        int num1 = Integer.[1](args[0]);
        int num2 = Integer.[2](args[1]);
        System.out.println(num1 + num2);
    }
}

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AparseInt

BvalueOf

CtoString

DparseDouble

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to create a program that prints command line arguments in uppercase if they exist.

Java

public class Main {
    public static void main(String[] args) {
        if (args.[1] > 0) {
            for (int i = 0; i < args.[2]; i++) {
                System.out.println(args[i].[3]());
            }
        } else {
            System.out.println("No arguments");
        }
    }
}

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Alength

Bsize

CtoUpperCase

DtoLowerCase

Attempts:

3 left