Accessing arguments in Java - Interactive Code Practice

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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(args[[1]]);
    }
}

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Alength

B0

C1

Dargs

Attempts:

3 left

2fill in blank

medium

Complete the code to check if any arguments were passed.

Java

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

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Acount

Blength()

Csize()

Dlength

Attempts:

3 left

3fill in blank

hard

Fix the error in the code to print all arguments using a for loop.

Java

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

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Alength

Blength()

Ccount

Dsize()

Attempts:

3 left

4fill in blank

hard

Fill both blanks to print the last argument safely.

Java

public class Main {
    public static void main(String[] args) {
        if (args.[1] > 0) {
            System.out.println(args[args.[2] - 1]);
        } else {
            System.out.println("No arguments.");
        }
    }
}

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Alength

Bsize

Clength()

Dcount

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to print all arguments in uppercase.

Java

public class Main {
    public static void main(String[] args) {
        for (int [1] = 0; [2] < args.[3]; [1]++) {
            System.out.println(args[[1]].toUpperCase());
        }
    }
}

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Ai

Bj

Clength

Dsize

Attempts:

3 left