Java switch on boolean in

Can switch statements in java work with boolean

You can not use boolean on switch statements. it is no point to use switch when the statement is true or false. it is easy to use if-else.,Find centralized, trusted content and collaborate around the technologies you use most.,At most one default label may be associated with the same switch statement,You can also condense it to a single statement by using a conditional expression:

You are switching on boolean type, and your cases are using int types. But even though you change your cases to have boolean types, that wouldn’t work. You cannot switch on boolean type. And that wouldn’t make any sense as using an if-else would be easier anyways:

You can also condense it to a single statement by using a conditional expression:

public void test(boolean isOn)

Answer by Jeremias Atkins

The expression used in a switch statement must have an integral or boolean expression, or be of a class type in which the class has a single conversion function to an integral or boolean value. If the expression is not passed then the default value is true.,The expression used in a switch statement must have an variable of interface<> type.,The constant-expression for a case must be the same data type as the variable in the switch, and it must be a constant or a literal.,A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

The syntax for expression switch statement in Go programming language is as follows −

switch(boolean-expression or integral type) < case boolean-expression or integral type : statement(s); case boolean-expression or integral type : statement(s); /* you can have any number of case statements */ default : /* Optional */ statement(s); >

package main import "fmt" func main() < /* local variable definition */ var grade string = "B" var marks int = 90 switch marks < case 90: grade = "A" case 80: grade = "B" case 50,60,70 : grade = "C" default: grade = "D" >switch < case grade == "A" : fmt.Printf("Excellent!\n" ) case grade == "B", grade == "C" : fmt.Printf("Well done\n" ) case grade == "D" : fmt.Printf("You passed\n" ) case grade == "F": fmt.Printf("Better try again\n" ) default: fmt.Printf("Invalid grade\n" ); >fmt.Printf("Your grade is %s\n", grade ); > 

When the above code is compiled and executed, it produces the following result −

Excellent! Your grade is A 

The syntax for a type switch statement in Go programming is as follows −

package main import "fmt" func main() < var x interface<>switch i := x.(type) < case nil: fmt.Printf("type of x :%T",i) case int: fmt.Printf("x is int") case float64: fmt.Printf("x is float64") case func(int) float64: fmt.Printf("x is func(int)") case bool, string: fmt.Printf("x is bool or string") default: fmt.Printf("don't know the type") >> 

When the above code is compiled and executed, it produces the following result −

Answer by Kendall Allison

The switch differs from the if in that switch can only test for equality, whereas if can evaluate any type of Boolean expression. That is, the switch looks only for a match between the value of the expression and one of its case constants.,The expression must be of type byte, short, int, or char; each of the values specified in the case statements must be of a type compatible with the expression.,Switch statement in Java is for decision making. Unlike if-then and if-then-else statements, the switch statement can have a number of possible execution paths.,Here, expression month in switch statement matches to case with value 4, so season is assigned value Spring.

The general form of a switch statement is:

Example

// An example to illustrate switch statement class Switch < public static void main(String args[]) < int month = 4; String season; switch (month) < case 12: case 1: case 2: season = "Winter"; break; case 3: case 4: case 5: season = "Spring"; break; case 6: case 7: case 8: season = "Summer"; break; case 9: case 10: case 11: season = "Autumn"; break; default: season = "Bogus Month"; >System.out.println("April is in the " + season + "."); > >

The ouput of the program is:

Answer by Fernando Berry

A switch statement takes a single value, then compares it to a bunch of other values using a boolean expression. When one of these boolean expressions is true then a specific piece of code will execute. ,This structure allows you to easily map a value to a piece of code that should be executed. Take a look at a simple switch statement below to get a handle on the syntax in Java:,Generally when you have a situation where you’re using a switch the default will just catch any situations that you don’t want to specify in a case statement.,In practice, switch statement are used far less frequently than if statements. The reason is that there’s far fewer situations where a switch statement is appropriate over an if statement. A good rule of thumb though is that if you need to check one value against a bunch of other values for equality, then you might need a switch!

Copychar myGrade = 'A'; switch(myGrade)

Answer by Ronin Sierra

You could also display the name of the month with if-then-else statements:,The following code example, SwitchDemo2, shows how a statement can have multiple case labels. The code example calculates the number of days in a particular month:,Note: This example checks if the expression in the switch statement is null. Ensure that the expression in any switch statement is not null to prevent a NullPointerException from being thrown.,Unlike if-then and if-then-else statements, the switch statement can have a number of possible execution paths. A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Enum Types), the String class, and a few special classes that wrap certain primitive types: Character, Byte, Short, and Integer (discussed in Numbers and Strings).

 public class SwitchDemo < public static void main(String[] args) < int month = 8; String monthString; switch (month) < case 1: monthString = "January"; break; case 2: monthString = "February"; break; case 3: monthString = "March"; break; case 4: monthString = "April"; break; case 5: monthString = "May"; break; case 6: monthString = "June"; break; case 7: monthString = "July"; break; case 8: monthString = "August"; break; case 9: monthString = "September"; break; case 10: monthString = "October"; break; case 11: monthString = "November"; break; case 12: monthString = "December"; break; default: monthString = "Invalid month"; break; >System.out.println(monthString); > > 

Answer by Israel Bauer

Switch Statement in Java,Duplicate case values are not allowed.,The value for a case must be of the same data type as the variable in the switch. ,Break statement in Java

The switch statement is a multi-way branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression. Basically, the expression can be byte, short, char, and int primitive data types. Beginning with JDK7, it also works with enumerated types ( Enums in java), the String class and Wrapper classes.
Syntax of Switch-case :

// switch statement switch(expression) < // case statements // values must be of same type of expression case value1 : // Statements break; // break is optional case value2 : // Statements break; // break is optional // We can have any number of case statements // below is default statement, used when none of the cases is true. // No break is needed in the default case. default : // Statements >

elective courses : Machine Learning, Big Data 

Answer by Oaklynn Morse

This example showed just a bit of what Java language enumerations can do. To learn more, see Enumerated Types, Finally, you should use the default statement at the end of the switch to handle all values that aren’t explicitly handled by one of the case statements. , The following code, taken from SwitchEnumDemo is almost identical to the code you previously saw from SwitchDemo2. It substitutes enumerated values for the integers, but otherwise the switch statement is the same.

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How to Use Boolean in Switch Case in Java: A Comprehensive Guide for Better Code

Learn how to use boolean in switch case statements in Java for more efficient and readable code. This guide provides examples and insights on using boolean logic in switch case statements.

If you are a Java developer, you may have encountered situations where you need to execute different code blocks based on different conditions. Java’s switch-case statement is a powerful tool that helps you achieve this goal. In this post, we will explore how to use boolean in switch case statements in Java.

Java supports boolean expressions in switch-case statements

Java allows expressions within switch-case statements, and boolean type is one of the supported types. A boolean can only have two values, true and false. You can use boolean expressions as switch expressions or case labels.

Switch-case statements are more efficient than if-else statements when you have multiple conditions to check. Using boolean expressions in switch-case statements can improve code readability.

Here is an example code that uses boolean in switch-case statements:

In this example, the switch expression is a boolean variable isRaining . If isRaining is true , the code block inside the first case will be executed. If isRaining is false , the code block inside the second case will be executed.

Using if statements with boolean values instead of switch-case statements

The default case in a switch statement with boolean will never be reached, and it’s better to use an if statement. If statements can evaluate any type of boolean expression, whereas switch statements can only test for equality.

Here is an example code that uses if statements with boolean values:

In this example, the if statement checks if isRaining is true . If it is, the first code block will be executed. Otherwise, the second code block will be executed.

If statements provide more flexibility than switch-case statements when dealing with boolean expressions. If statements can handle more complex boolean expressions that cannot be evaluated in switch-case statements.

Here is an example code that uses more complex boolean expressions in if statements:

if (isRaining && isCold) < System.out.println("Take a coat and an umbrella."); >else if (isRaining) < System.out.println("Take an umbrella."); >else

In this example, the if statement checks if isRaining and isCold are both true . If they are, the first code block will be executed. If only isRaining is true , the second code block will be executed. If neither isRaining nor isCold is true , the third code block will be executed.

Switch Case in Java

Using constant expressions with boolean logic in switch-case statements

Boolean logic can be used in switch-case statements with if statements or by using constant expressions. Switch-case statements with boolean expressions like case (i<=90) are not allowed, and cases must be constant expressions to be evaluated.

Here is an example code that uses constant expressions with boolean logic in switch-case statements:

final int LOW = 0; final int HIGH = 100; switch (score >= LOW && score

Constant expressions can be used to define a range of values for switch-case statements with boolean logic. Constant expressions can be defined using final variables or enums.

Here is an example code that uses enums with switch-case statements:

enum Grade < A, B, C, D, F >switch (studentGrade)

In this example, the switch expression is an enum studentGrade . If studentGrade is either A or B , the first code block will be executed. If studentGrade is either C , D or F , the second code block will be executed.

Other helpful code examples for «How can we use boolean in switch case in Java» include: «Additional code examples for using boolean in switch case statements in Java

In Typescript case in point, can switch statements in java work with boolean code example

The expression in the switch statement must be of type char, byte, short, or int. It cannot be boolean, float, double, or String.

In Java , in particular, how to use a switch statement in java code example

case 6: System.out.println("Today is Saturday"); break; case 7:

Conclusion

By understanding how to use boolean in switch-case statements, you can write more efficient and readable code in Java. Switch-case statements are more efficient than if-else statements when you have multiple conditions to check. If statements provide more flexibility than switch-case statements when dealing with boolean expressions. Constant expressions can be used to define a range of values for switch-case statements with boolean logic.

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