A class that is used to contain other java objects. They contain methods for adding and removing objects, as well as ways to iterate through them. They tend to differ mostly by how the objects are referenced (by key or no), by how fast their various methods execute, and by how much memory the container uses. Examples include: java.util.Vector java.util.Hashtable java.util.HashSet
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In Java, a Container is an AWT superclass which simply describes any Component class that can contain other Component objects. A Panel is a specific type of Container.
Java source files have the .java extension, compiled Java class files have the .class extension.
Well, the Container extends Component, so ALL containers in Java are components. This includes classes like Panel, ScrollPane, Window, and JComponent. Plus all the various generations of subclasses of each of those containers.
The actions in a java class are called methods.
without class non of the folder can run so the java program should start in class we can use the class without object in java