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Please enable JavaScript in your browser settings or update your browser.Вивчайте Enhanced Switch Statement | Deep Java Structure
Java Extended
course content

Зміст курсу

Java Extended

Java Extended

1. Deep Java Structure
How Does the Compiler Works?Data Transfer in JavaFinal KeywordImporting LibrariesUsing Libraries In Our CodeTernary OperatorEnhanced Switch Statement
2. Methods
What is a Method?Creating Our Own MethodsChallenge: Names Starting with Letter BVoidMethods PracticeMethod Overloading RecursionChallenge: Find Maximum and Minimum in Array
3. String Advanced
Deeper into StringMethod split()Challenge: Uppercase Even WordsindexOf() MethodChallenge: Finding the Longest Wordtrim() MethodChallenge: Email Validation
4. Classes
What is Class?Main Class and MethodAccess ModifiersClass CreationChallenge: Get Information About the ObjectConstructorChallenge: Team ConstructorMethod toString()Challenge: Parrot Information Display
5. Classes Advanced
Complex Classes UsageChallenge: Pet and Owner RelationshipPrivate ModifierChallenge: Animal Information DisplayGetter and SetterChallenge: Updating User InformationSummary

book
Enhanced Switch Statement

How to Optimize a Switch Statement?

Just like the if-statement has the ternary operator, the switch-statement has an enhanced version called the enhanced switch. Let's take a look at the syntax right away:

Main.java

Main.java

copy

              
123456789101112

            
switch (variable) {
    case value1 -> {
        // code block
    }
    case value2 -> {
        // code block
    }
    // additional cases
    default -> {
        // code block
    }
}

The enhanced switch statement uses a simplified syntax with -> instead of case and break. It allows you to write concise code blocks for each case directly without the need for explicit break statements.

Let's take a look at an example of using a switch statement. First, let's see a regular switch statement:

Main.java

Main.java

copy

              
123456789101112131415161718192021

            
package com.example;

public class Main {
    public static void main(String[] args) {
        int a = 10;
        switch (a) {
            case 5:
                System.out.println("five");
                break;
            case 0:
                System.out.println("zero");
                break;
            case 10:
                System.out.println("ten");
                break;
            default:
                System.out.println("no value");
                break;
        }
    }
}

Now let's replace it with the enhanced version to see the difference:

Main.java

Main.java

copy

              
123456789101112131415161718192021

            
package com.example;

public class Main {
    public static void main(String[] args) {
        int a = 10;
        switch (a) {
            case 5 -> {
                System.out.println("five");
            }
            case 0 -> {
                System.out.println("zero");
            }
            case 10 -> {
                System.out.println("ten");
            }
            default -> {
                System.out.println("no value");
            }
        }
    }
}

As you can see, the syntax has changed, and the code has become shorter. Additionally, we no longer need to explicitly write the break keyword; the compiler now understands that it should stop executing the switch statement after matching one of the cases.

In this way, we can simplify our switch statement and write professional code.

1. What is the case syntax of enhanced Switch statement?

2. Do we need to use break; keyword with enhanced switch?

question mark

What is the case syntax of enhanced Switch statement?

Select the correct answer

question mark

Do we need to use break; keyword with enhanced switch?

Select the correct answer

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Секція 1. Розділ 7

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course content

Зміст курсу

Java Extended

Java Extended

1. Deep Java Structure
How Does the Compiler Works?Data Transfer in JavaFinal KeywordImporting LibrariesUsing Libraries In Our CodeTernary OperatorEnhanced Switch Statement
2. Methods
What is a Method?Creating Our Own MethodsChallenge: Names Starting with Letter BVoidMethods PracticeMethod Overloading RecursionChallenge: Find Maximum and Minimum in Array
3. String Advanced
Deeper into StringMethod split()Challenge: Uppercase Even WordsindexOf() MethodChallenge: Finding the Longest Wordtrim() MethodChallenge: Email Validation
4. Classes
What is Class?Main Class and MethodAccess ModifiersClass CreationChallenge: Get Information About the ObjectConstructorChallenge: Team ConstructorMethod toString()Challenge: Parrot Information Display
5. Classes Advanced
Complex Classes UsageChallenge: Pet and Owner RelationshipPrivate ModifierChallenge: Animal Information DisplayGetter and SetterChallenge: Updating User InformationSummary

book
Enhanced Switch Statement

How to Optimize a Switch Statement?

Just like the if-statement has the ternary operator, the switch-statement has an enhanced version called the enhanced switch. Let's take a look at the syntax right away:

Main.java

Main.java

copy

              
123456789101112

            
switch (variable) {
    case value1 -> {
        // code block
    }
    case value2 -> {
        // code block
    }
    // additional cases
    default -> {
        // code block
    }
}

The enhanced switch statement uses a simplified syntax with -> instead of case and break. It allows you to write concise code blocks for each case directly without the need for explicit break statements.

Let's take a look at an example of using a switch statement. First, let's see a regular switch statement:

Main.java

Main.java

copy

              
123456789101112131415161718192021

            
package com.example;

public class Main {
    public static void main(String[] args) {
        int a = 10;
        switch (a) {
            case 5:
                System.out.println("five");
                break;
            case 0:
                System.out.println("zero");
                break;
            case 10:
                System.out.println("ten");
                break;
            default:
                System.out.println("no value");
                break;
        }
    }
}

Now let's replace it with the enhanced version to see the difference:

Main.java

Main.java

copy

              
123456789101112131415161718192021

            
package com.example;

public class Main {
    public static void main(String[] args) {
        int a = 10;
        switch (a) {
            case 5 -> {
                System.out.println("five");
            }
            case 0 -> {
                System.out.println("zero");
            }
            case 10 -> {
                System.out.println("ten");
            }
            default -> {
                System.out.println("no value");
            }
        }
    }
}

As you can see, the syntax has changed, and the code has become shorter. Additionally, we no longer need to explicitly write the break keyword; the compiler now understands that it should stop executing the switch statement after matching one of the cases.

In this way, we can simplify our switch statement and write professional code.

1. What is the case syntax of enhanced Switch statement?

2. Do we need to use break; keyword with enhanced switch?

question mark

What is the case syntax of enhanced Switch statement?

Select the correct answer

question mark

Do we need to use break; keyword with enhanced switch?

Select the correct answer

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 1. Розділ 7
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