Topics Discussed: Class Wrappers and changing types using toString / parseint / parseDouble
Source code http://ideone.com/hXBHcF
Class wrappers exist to help us manipulate primitives of similar type. Some code that you’ll want to be aware of is:
Double d = null; // Class wrappers can accept null values Double.parseInt(d); //Class wrappers can be used to change the variable type as long as the data is the same **NOTE** When changing variable type, there can be a loss of precision. Example double d= 4.779; int i = Double.parseInt(d); // I would now be equal to 4. Everything after the decimal would be dropped.