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Java - Coggle Diagram

- - - - A class is built to perform its own special features
        
        Hide inside properties of object, other objects can not change properties directly
        
        Keywords: private, public, protected, default
    - - Inherit the another object features
        
        Single level, multilevel, hierachical: is inherited from multi childrent classes, multiple: is inherited from interface, hybrit: combine bettween multilevel and multiple
        
        Keywords: extends
    - - Via inheritance, a child class can change or extend methods of parent class
    - - Select the necessary attributes or methods
        
        Keywords: implements, super, override: redefine, overloading: many methods have the same name but different parameters
- - - - Group multi sqls send to DB at the same time