Contents - Cultural View

Java syntax 193
}
public void walk() {
}
final classes
The final modifier can be an optional modifier for classes to make them uninheritable.
final class Foo { // This class cannot be extended by any other class
}
Enumerations
This language feature was introduced in J2SE 5.0. Technically enumerations are a kind of class which contains enum
constants in its body. Each enum constant defines an instance of the enum type. Enumeration classes cannot be
instantiated anywhere except in the enumeration class itself.
enum Season {
}
WINTER, SPRING, SUMMER, AUTUMN
Enum constants are allowed to have constructors, which are called when the class is loaded:
public enum Season {
}
WINTER("Cold"), SPRING("Warmer"), SUMMER("Hot"), AUTUMN("Cooler");
Season(String description) {
}
this.description = description;
private final String description;
public String getDescription() {
}
return description;
Enumerations can have class bodies, in which case they are treated like anonymous classes extending the enum
class:
public enum Season {
WINTER {
},
String getDescription() {return "cold";}
SPRING {
},
String getDescription() {return "warmer";}
SUMMER {
},
String getDescription() {return "hot";}