CODEWITHSUNDEEP
intellij-ideagroovynullpointerexception
J. Doe
J. Doe

Reputation: 33

Console.ReadLine() throws nullpointer exception in Groovy

I started learning groovy yesterday and have been enjoying it thus far until I got to the part of the book where I have to take in inputs from the user using console().readLine() but I keep getting this error

Caught: java.lang.NullPointerException: Cannot invoke method readLine() on null object java.lang.NullPointerException: Cannot invoke method readLine() on null object
at com.usl.NewCodes.run(NewCodes.groovy:30)

I have tried it in intelliJ both as a groovy script and in a class. I even went on to try it in the groovyConsole yet it still throws an error.

Here is the code

print("What is your name ");
def fName = System.console().readLine()
println("Hello" + fName)

Thanks

Upvotes: 3

Views: 2835

Answers (1)

Nitin Dhomse
Nitin Dhomse

Reputation: 2612

If you are using any IDE for Groovy, the input / output console will not be available to you hence throwing null pointer exception so, you can use the following, If you are using Intellij enable groovy console from Tools -> groovy console for I/O.

 println "What is your name?"
 println "Your name is:"+System.in.newReader().readLine()

Upvotes: 2

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