Class objects are useful for programs that inquire dynamically about the capabilities of classes. The construct Type. class returns an object of type class, as does the static forName method. The getName method returns the name of the class.
Trap
These methods are inconsistently implemented for basic types and arrays.
Consider the following:
Class cll = Double.class;
Class c12 = double.class;
Class c13 = douhle[].class;
Class c14 = Double[].class;
System.out.println(cll.getName()); // prints java.lang.Double
System.out.println(c12.getName()); // prints double
System.out.println(c13.getName()); // prints [D (!)
System.out.println(c14.getName()); // prints[Ljava.lang.Double;
cll = Class.forName("java.lang.Double"); // ok
c12 = Class.forName("double"); // throws exception
c13 = Class.forName("double[]"); // throws exception
c13 = Class.forName("[D"); // ok
