Exploring Advanced Language Features - Beginning Java 7 - page 177

System.out.println("height = "+r.getHeight());
System.out.println("contains(15.0, 15.0) =

"+r.contains(15.0, 15.0));
System.out.println("contains(0.0, 0.0) =

"+r.contains(0.0, 0.0));
}

}

Listing 3-4 first instantiates Rectangle 's Double subclass via new Rect-
angle.Double(10.0, 10.0, 20.0, 30.0) and then invokes its various
methods.Continuing, Listing3-4 instantiates Rectangle 's Float subclassvia new
Rectangle.Float(10.0f, 10.0f, 20.0f, 30.0f) before invoking
Rectangle methods on this instance.
Compilebothlistings( javac SMCDemo.java or javac *.java )andrunthe
application ( java SMCDemo ). You will then observe the following output:
x = 10.0
y = 10.0
width = 20.0
height = 30.0
contains(15.0, 15.0) = true
contains(0.0, 0.0) = false

x = 10.0
y = 10.0
width = 20.0
height = 30.0
contains(15.0, 15.0) = true
contains(0.0, 0.0) = false
Java's class library contains many static member classes. For example, the
java.lang.Character class encloses a static member class named Subset
whose instances represent subsets of the Unicode character set.
java.util.AbstractMap.SimpleEntry ,
java.io.ObjectInputStream.GetField ,

and

java.security.KeyStore.PrivateKeyEntry are other examples.