Java Programming Thought study notes--Introduction to the first chapter object

For more than a year Java, Wild path origin, found that the Java Foundation this piece is still quite weak! So decided to learn the Java programming idea of the book. Here to learn the knowledge points recorded!

Five characteristics of object-oriented

1. All things are objects

2. Programs are collections of objects that tell each other what they want to do by sending messages

3. Each object is stored by its own other objects

4. Each object has its type

5. All objects of a particular type can receive the same information

Single Inheritance Structure

All classes inherit from a single base class, Object. All objects in a single integrated structure have a common interface, so they are all the same basic types in the final analysis. A single integration ensures that all objects have some functionality.

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Java Programming Thought study notes--Introduction to the first chapter object