How to convert a String to an Integer in Groovy [duplicate]

Question

How can I convert a String (which is a number) to integer in Groovy. I am using Groovy 2.4.5. Here is a sample code which throws exception:

Code:

def String a = "CHECK";

def String b = "3.5";
def String c = "7.5";

println "Is a number ? " + a.isNumber();
println "Is b number ? " + b.isNumber();
println "Is c number ? " + c.isNumber();

if (a.equals("CHECK"))
{
    def int x = b.toInteger();
    def int y = c.toInteger();
}

println b+c;

Output (with exceptions):

Is a number ? false
Is b number ? true
Is c number ? true
Exception thrown

java.lang.NumberFormatException: For input string: "3.5"

    at myAdditionLogic.run(myAdditionLogic.groovy:12)

Answer 1

integer is a 32-bit number that doesn’t include a decimal point. You probably want a decimal data type, like Double.

Try this:

String a = "CHECK";

String b = "3.5";
String c = "7.5";

println "Is a number ? " + a.isNumber();
println "Is b number ? " + b.isNumber();
println "Is c number ? " + c.isNumber();

if (a.equals("CHECK"))
{
    def x = b as Double;
    def y = c as Double;
    println x + y
}