double b = Double.toDouble(a); take care, Sina From: program-java-bounce@xxxxxxxxxxxxx [mailto:program-java-bounce@xxxxxxxxxxxxx] On Behalf Of Roger Woolgrove Sent: Friday, April 22, 2011 3:29 PM To: JavaProgramming Subject: [program-java] Simple problem with String to double Hello all, I'm struggling to recall how to convert a String of numbers (ie 42.52) to a double value that I may use the value for mathematical functions. Could someone please supply syntax to change the string below into a double value. Many thanks. String a = "42.5" double b = (code here to change a to double) Roger