The cytoplasm is about 80% water and usually colorless. It is within the cytoplasm that most cellular activities occur, such as many metabolic pathways including glycolysis, and processes such as cell division.he physical properties of the cytoplasm have been contested in recent years. It remains uncertain how the varied components of the cytoplasm interact to allow movement of particles and organelles while maintaining the cellâs structure.
There are times, however, when you need to use a char as an objectâfor example, as a method argument where an object is expected. The Java programming language provides a wrapper class that wraps the char in a Character object for this purpose. An object of type Character contains a single field, whose type is char. This Character class also offers a number of useful class (i.e., static) methods for manipulating characters.
The term wrapper class in Java refers to the classes that represent the primitive types in Object form. For example, the class java.lang.Integer wraps the primitive type int and java.lang.Double wraps double. These classes allow primitives to be used in places where an Object is required, for instance as a key to a Map or an element of a Collection. Before the release of JDK 1.5 you were required to convert primitive values to their equivalent wrapper class explicitly.