Switch in Groovy

Our example program demonstrates the use of switch statements. Here’s the full source code.

import java.time.DayOfWeek
import java.time.LocalTime

def i = 2
println "Write ${i} as "
switch (i) {
    case 1:
        println "one"
        break
    case 2:
        println "two"
        break
    case 3:
        println "three"
        break
}

def today = DayOfWeek.from(java.time.LocalDate.now())
switch (today) {
    case DayOfWeek.SATURDAY, DayOfWeek.SUNDAY:
        println "It's the weekend"
        break
    default:
        println "It's a weekday"
        break
}

def now = LocalTime.now()
switch (true) {
    case now.hour < 12:
        println "It's before noon"
        break
    default:
        println "It's after noon"
        break
}

def whatAmI = { obj ->
    switch (obj) {
        case Boolean:
            println "I'm a bool"
            break
        case Integer:
            println "I'm an int"
            break
        default:
            println "Don't know type ${obj.getClass().getSimpleName()}"
            break
    }
}

whatAmI(true)
whatAmI(1)
whatAmI("hey")

Here’s how you can run the Groovy script:

$ groovy SwitchExample.groovy
Write 2 as two
It's a weekday
It's after noon
I'm a bool
I'm an int
Don't know type String

Groovy scripts can be executed directly using the groovy command. Save the script in a file named SwitchExample.groovy and run the command shown above.

Now that we can run and build basic Groovy programs, let’s learn more about the language.

If Else in Groovy

Arrays in Groovy

Learn X By Example

Title here

Switch in Groovy