In this post, we feature a comprehensive Java Switch Case Example. Java provides decision making statements so as to control the flow of your program. The switch statement in java is the one that we will explain in this article. These statements are:

• if...then
• if...then...else
• switch..case

A switch statement in java checks if a variable is equal to a list of values. The variable in the switch statement can be abyte, short, int, orchar. However, Java 7 supports alsoswitch statements with Strings. We will see such an example in the next sections.

1. Syntax of Java switch case

The syntax of aswitch case statement is the following:

switch (variable) {  case c1:        statements // they are executed if variable == c1        break;  case c2:         statements // they are executed if variable == c2        break;  case c3:  case c4:                statements // they are executed if variable ==  any of the above c's        break;  . . .  default:        statements // they are executed if none of the above case is satisfied        break;}

• switch: theswitch keyword is followed by a parenthesized expression, which is tested for equality with the following cases. There is no bound to the number of cases in aswitchstatement.
• case: thecase keyword is followed by the value to be compared to and a colon. Its value is of the same data type as the variable in theswitch. The case which is equal to the value of the expression is executed.
• default: If no case value matches theswitch expression value, execution continues at thedefault clause. This is the equivalent of the"else" for theswitch statement. It is conventionally written after the last case, and typically isn’t followed bybreak because execution just continues out of theswitch. However, it would be better to use abreak keyword todefault case, too. If no case matched and there is nodefault clause, execution continues after the end of theswitch statement.
• break: Thebreak statement causes execution to exit theswitch statement. If there is nobreak, execution flows through into the next case, but generally, this way is not preferred.

2. Example of switch case

Let’s see an example of theswitch case. Create a java class namedSwitchCaseExample.java with the following code:

SwitchCaseExample.java

In the above code we can see twoswitch case statements, one usingchar as data type of the expression of theswitch keyword and one usingint.

Output

Excellent gradeFinal result: SuccessGood gradeFinal result: SuccessLow gradeFinal result: FailInvalid gradeNo result

Below is the equivalent of theswitch case statement in the methodpassTheCourse() usingif..then..else:

3. Example of switch case using String

As we mentioned in the introduction of this example, Java SE 7 supports String inswitch case statements. Let’s see such an example. Create a java class namedStringSwitchCase.java with the following code:

StringSwitchCase.java

If we run the above code, we will have the following result:

Output

User wants to visit SantoriniUser wants to visit CreteUnknown Island

4. More articles

• Simple while loop Java Example
• For Each Loop Java 8 Example
• For loop Java Example

5. Download the source code

This was a Java Switch-Case Example.

Last updated on Apr. 29th, 2021

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