What do classes include Java?

A Java class may contain a mix of data (variables) and actions (methods) . Grouping variables and operations on these variables into Java classes makes it easier to structure your Java program when it gets too big to fit comfortably inside a single Java class. A Java class must be stored in its own file.

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What is standard classes in Java?

Java’s standard classes are analogous to off-the-shelf hardware components . Java includes a multitude of classes. These classes are organized into collections called packages. In order to speed compilation and class loading during execution, the compiler normally has access to a small subset of the standard classes.

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