Java_Syntax

Question 1

What are the different data types supported in switch: case in Java?

Answer 1

int, char, byte, short, string

Question 2

Operators precedence in Java.

Answer 2

Question 3

What are the signed and unsigned shift of bits operators in Java?

Answer 3

// Unsigned shift operation >>>
        // it adds '0's to MSB instead of
        // 1's when a signed shift done >>
        int iii = -8;
        iii = iii >>> 1;

        System.out.println("Unsigned shift result of iii: " + iii);

        int jjj = -8;
        jjj = jjj >> 1;

        System.out.println("Signed shift result of jjj: " + jjj);

Question 4

Provide an example of using a ternary operator in Java?

Answer 4

Question 5

Provide an example of enum in Java.

Answer 5

• enums provide compile-time check
• enums in Java can be used in many ways, to fetch the name of the element, the value of the element.
• Check below example:

// Enums
        Days today = Days.Monday;
        switch(today){
            case Monday:
                String theDay = Days.Monday.name();
                Days theUserDay = Days.valueOf("Monday");
                System.out.println("It's " + theDay + "!!");
                System.out.println("It's " + theUserDay + "!!");
                break;
            default:
                System.out.println("Default days");
        }