OK. I know that according to Java Docs:
parseFloat will return a NumberFormatException - if the string does not contain a parsable float.
I thought that the parseFloat method would see if the first character is a number and if it is then it will read until it finds a character and then return the value up until but not including the character as a Float.
So with that in mind I am attempting to do the following and getting a NumberFormatException.
float value;
value = Float.parseFloat("50C");
I was hoping that it would return with value = 50.
Can someone please explain why the above conversion would return a NumberFormatException? Did I misunderstand what the parseFloat would do?
According to the Java 7 docs on Float:
parseFloat(String s)Returns a new float initialized to the value represented by the specified String, as performed by the valueOf method of class Float.
And for the valueOf method:
valueOf(String s)Returns a Float object holding the float value represented by the argument string s.
So if the string passed to parseFloat method does not represent a float string, you will end up getting your NumberFormatException because it cannot convert it to a float.
Source: http://docs.oracle.com/javase/7/docs/api/java/lang/Float.html