Java - swtich Statement

The switch statement is a good alternative for the if...elseif... statement and it provides the parallel alternatives. The switch statment internally performs only the equality comparision (eg: a == b) not like a if statement expression (i.e. swtich statement can't execute the expressions like a > b).

Example: #1 - switch Statement

Print the greeting message in the console using switch statement based on the value of the input string language.

Java Input Screen

class ConditionalStatement {
    public static void main(String[] args) {
        String language = "Java";

        switch(language) {
            case "C":
                System.out.println("Welcome to the world of 'C'");    
                break;
            case "Java":
                System.out.println("Welcome to the world of 'Java'");
                break;
            case "Kotlin":
                System.out.println("Welcome to the world of 'Kotlin'");    
                break;
        }
    }
}

Java Output Screen

Welcome to the world of 'Java'

Example: #2 - switch Statement with a default statement

switch Statement with a default statement extractly similar like a else block in if...else... statement

Java Input Screen

class ConditionalStatement {
    public static void main(String[] args) {
        String language = "Python";

        switch(language) {
            case "C":
                System.out.println("Welcome to the world of 'C'");    
                break;
            case "Java":
                System.out.println("Welcome to the world of 'Java'");
                break;
            case "Kotlin":
                System.out.println("Welcome to the world of 'Kotlin'");
                break;
            default:
                System.out.println("None of the language selected");
        }
    }
}

Java Output Screen

None of the language selected

Example: #3 - switch Statement using OR codition

Print the rating message based on the provided score.

Java Input Screen

class ConditionalStatement {
    public static void main(String[] args) {
        int score = 6;

        switch(score) {
            case 10:
                System.out.println("Extraordinary");    
                break;
            case 9:
                System.out.println("Very Good");
                break;
            case 8:
                System.out.println("Good");    
                break;
            case 7:
            case 6:
            case 5:
                System.out.println("Average");
                break;
            case 4:
            case 3:
            case 2:
            case 1:
                System.out.println("Poor");    
                break;
        }
    }
}

Java Output Screen

Average

Example: #4 - switch Statement without break statement

switch Statement without a break statement executes all the consecutive case statements until it reaches the break statement.

Java Input Screen

class ConditionalStatement {
    public static void main(String[] args) {
        String language = "Java";

        switch(language) {
            case "C":
                System.out.println("Welcome to the world of 'C'");    
            case "Java":
                System.out.println("Welcome to the world of 'Java'");
            case "Kotlin":
                System.out.println("Welcome to the world of 'Kotlin'");
            case "Scala":
                System.out.println("Welcome to the world of 'Scala'");
                break;
            case "Python":
                System.out.println("Welcome to the world of 'Python'");
                break;
        }
    }
}

Java Output Screen

Welcome to the world of 'Java'

Welcome to the world of 'Kotlin'

Welcome to the world of 'Scala'

Example: #5 - Nested switch Statement

Print the greeting message for the language Java with a basic subscription using nested switch statement.

Java Input Screen

class ConditionalStatement {
    public static void main(String[] args) {
        String language = "Java";
        String subscription = "basic";

        switch(language) {
            case "C":
                switch(subscription) {
                    case "basic":
                        System.out.println("Subscription for basics of 'C' language is $15");    
                        break;
                    case "advanced":
                        System.out.println("Subscription for advanced concepts in 'C' language is $30");
                        break;
                    default:
                        System.out.println("None of the subscription selected on 'C' language");
                }

                System.out.println("Thanks for choosen the 'C' language");
                break;
            case "Java":
                switch(subscription) {
                    case "basic":
                        System.out.println("Subscription for basics of 'Java' language is $20");    
                        break;
                    case "advanced":
                        System.out.println("Subscription for advanced concepts in 'Java' language is $35");
                        break;
                    default:
                        System.out.println("None of the subscription selected on 'Java' language");
                }

                System.out.println("Thanks for choosen the 'Java' language");
                break;
            case "Kotlin":
                switch(subscription) {
                    case "basic":
                        System.out.println("Subscription for basics of 'Kotlin' language is $20");    
                        break;
                    case "advanced":
                        System.out.println("Subscription for advanced concepts in 'Kotlin' language is $40");
                        break;
                    default:
                        System.out.println("None of the subscription selected on 'Kotlin' language");
                }

                System.out.println("Thanks for choosen the 'Kotlin' language");
                break;
            default:
                System.out.println("None of the language selected");
        }
    }
}

Java Output Screen

Subscription for basics of 'Java' language is $20

Thanks for choosen the 'Java' language

Ternary Operator

while Loop

Related Tags:

java
switch
case
default
conditional statement
equality comparision
break statement
or condition

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