What are the characteristics of the interface?

The characteristics of the interface are: 1. The interface is modified with the interface keyword; 2. The interface cannot be instantiated; 3. The implementation class must implement all methods of the interface (except abstract classes); 4. The implementation class can Implement multiple interfaces; 5. The constants in the interface are all static constants

java interface features:

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(1) The interface is modified with the interface keyword;

(2)The interface cannot be instantiated;

(3)The implementation class must All methods that implement interfaces (except abstract classes);

(4) Implementation classes can implement multiple interfaces (java multiple inheritance);

(5) Constants in interfaces are static constants ;

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Code sample:

public  interface Myinter{
 
    public abstract void foo();
     
   //其他方法
 
}

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