Flowchart of Switch-Case Statement

This flowchart shows the control flow and working of switch statements:

Note: Java switch statement is a fall through statement that means it executes all statements if break keyword is not used, so it is highly essential to use break keyword inside each case.

Example: Finding Day

Consider the following Java program, it declares an int named day whose value represents a day(1-7). The code displays the name of the day, based on the value of the day, using the switch statement.

Java

// Java program to Demonstrate Switch Case
// with Primitive(int) Data Type

// Class
public class GFG {

    // Main driver method
    public static void main(String[] args)
    {
        int day = 5;
        String dayString;

        // Switch statement with int data type
        switch (day) {

        // Case
        case 1:
            dayString = "Monday";
            break;

        // Case
        case 2:
            dayString = "Tuesday";
            break;

            // Case
        case 3:
            dayString = "Wednesday";
            break;

            // Case
        case 4:
            dayString = "Thursday";
            break;

        // Case
        case 5:
            dayString = "Friday";
            break;

            // Case
        case 6:
            dayString = "Saturday";
            break;

            // Case
        case 7:
            dayString = "Sunday";
            break;

        // Default case
        default:
            dayString = "Invalid day";
        }
        System.out.println(dayString);
    }
}

Output

Friday

Switch Statements in Java

The switch statement in Java is a multi-way branch statement. In simple words, the Java switch statement executes one statement from multiple conditions.

It is like an if-else-if ladder statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression. The expression can be a byte, short, char, or int primitive data type. It tests the equality of variables against multiple values.

Note: Java switch expression must be of byte, short, int, long(with its Wrapper type), enums and string. Beginning with JDK7, it also works with enumerated types (Enums in java), the String class, and Wrapper classes.

Flowchart of Switch-Case Statement

Example: Finding Day

Switch Statements in Java

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