When using switch statements, it doesn't really matter if all cases are covered. Let's say, we have the following nested if-else statements: public String exampleOfIF(String animal) Based on the evaluation of a condition, a statement or a sequence of statements is executed. Decision-making statements enable us to change the flow of the program. We use switch case specifically, when we need to run only a specific code block, and if the other code blocks do. The decision-making or control statements supported by Java are as follows: if statement. Also, it continues to evolve – switch expressions will likely be introduced in Java 12.īelow we'll give some code examples to demonstrate the use of the switch statement, the role of the break statement, the requirements for the switch argument/ case values and the comparison of Strings in a switch statement. It is present in languages like C++ or Java. Switch has evolved over time – new supported types have been added, particularly in Java 5 and 7. The switch statement allows us to replace several nested if-else constructs and thus improve the readability of our code. In this tutorial, we'll learn what the switch statement is and how to use it. See, if we don’t use break, it executes all the cases after matching case.If you have a few years of experience in the Java ecosystem, and you're interested in sharing that experience with the community (and getting paid for your work of course), have a look at the "Write for Us" page. It is up to Java 17 that it is available in a stable long support (LTS) release. Conditional execution: Execute different blocks of code based on different conditions. It is important to note that switch expressions have been in the language since previous versions of Java, starting in Java 12 in preview mode and receiving constant improvements with the following versions of Java. So lets see what happens if we don’t use the break. For example, you might use a switch case statement to make sure that a user has entered a valid option. Use of break is optional in the switch case. In switch case, break is used to terminate the switch case execution and transfer control to the outside of switch case. Since Java has allowed to use string values in switch cases, so we are using string to create a string based switch case example.īreak statement is used to break the current execution of the program. So we are creating an enum of vowel alphabets and using its elements in switch case. This example returns day based on the numeric value.Īs we have said, Java allows to use enum in switch cases. In this example, we are using int type value to match cases. It is optional.įollowing is the syntax to declare the switch case in Java.Ĭode for execution when none of the case is true ĭata Flow Diagram Of switch Block Example: Using integer value
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