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Editor to share with you Java object-oriented how to achieve static internal classes, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

/ * * knowledge points: inner class 1. Definition of inner class 2. Advantages and disadvantages of inner classes 3. How external classes instantiate inner classes of other classes 4. Inner class defined in the method if the inner class is defined in the method, the inner class in the method needs to add the final keyword 5. Static declaration internal class title: the mother is pregnant, the mother's nutrition determines the child's healthy growth ideas: 1. Abstract classes: mother (Mother), child (Baby) 2. Find out the class relationship: the child is in the mother Baby in Mother 3. Abstract the method: mother eating (eat) * / public class InnerClass3 {public static void main (String [] args) {/ / instantiating mother Mother mother = new Mother ("lucy"); / / mother eating apple mother.eat ("apple") / / the child absorbs nutrients / / Mother.Baby baby=new Mother.Baby (); / / baby.eat (); Mother.Baby.eat ();}} class Mother {private String name; private static String food;// mother's food public Mother (String name) {this.name = name } public String getName () {return this.name;} public void setName (String name) {this.name = name;} / / Mother eats public void eat (String food) {this.food = food; System.out.println (this.name + "eat" + this.food) } static class Baby {/ / the child absorbs nutrients from what the mother eats public static void eat () {System.out.println ("the child absorbs nutrients from the mother's food" + food + ") These are all the contents of the article "how to implement static inner classes in Java object-oriented". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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