JAVA Level 3

1~5. 다음 코드에 대한 출력 결과를 쓰시오.

 

1.

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3};
        System.out.println(arr[1]);
    }
}

 

2.

public class Main {
    public static void main(String[] args) {
        int[][] arr = {{1, 2}, {3, 4}};
        System.out.println(arr[0][1]);
    }
}

 

3.

public class Main {
    public static void main(String[] args) {
        String str = "Hello";
        System.out.println(str.length());
    }
}

 

4.

public class Main {
    public static void main(String[] args) {
        String str1 = "Java";
        String str2 = "Programming";
        System.out.println(str1 + " " + str2);
    }
}

 

5.

public class Main {
    public static void main(String[] args) {
        char[] chars = {'H', 'e', 'l', 'l', 'o'};
        String str = new String(chars);
        System.out.println(str);
    }
}

 

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정답
(드래그 시 정답이 보입니다.)

1. 2
2. 2
3. 5
4. Java Programming
5. Hello