CODEWITHSUNDEEP
eclipsegroovy
Vivek Sadh
Vivek Sadh

Reputation: 4268

Strange output in groovy

I have just started to learn groovy. I am executing the program below:-

class hello {
    static void main(def args)
    {

BufferedReader br = new BufferedReader(new InputStreamReader(System.in))
print "Input:"
int userInput = br.read()
println userInput
for(int i=1;i<10;i++)
{
    int res = userInput + i
    println "$res"
}
    }

}

When i am entering any value it is giving strange value of userInput. I tried clearing the project and re-execute it. Then i figured out that it is taking the first number and printing its ASCII value. Why is it so ? Do i need to typecast ?

I even tried br.read().toInteger() but doesn't work.

Upvotes: 0

Views: 61

Answers (1)

tim_yates
tim_yates

Reputation: 171194

You're just reading the first char of the steam as an int ascii value.

Try reading the full line then converting it to an int:

int userInput = Integer.parseInt( br.readLine() )

More idiomatically, your class becomes (assuming Java 6):

class Hello {
    static main( args ) {
        System.console().with { c ->
            int userInput = Integer.parseInt( c.readLine( 'Input : ' ) )
            println userInput

            (1..9).each {
                println userInput + it
            }
        }
    }
}

Upvotes: 2

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