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.
Compared with the AWT classes (in package java.awt), Swing component classes (in package javax.swing) begin with a prefix J , e.g., JButton, JTextField, JLabel, JPanel, JFrame, or JApplet. The above figure shows the class hierarchy of the swing GUI classes. java.awt.Label provides a text description message. Take note that System.out.println() prints to the system console, not to the graphics screen. You could use a Label to label another component (such as text field) or provide a text description. Check the JDK API specification for java.awt.Label.