具有相同变量名称的Java接口是否被另一个变量扩展？

I have interfaces A & B with a variable of same name but different value.

我有接口A和B与一个相同名称但不同的值的变量。

 Interface A {

    public static final int a = 50;

    public void fun();

    }



Interface B {

public static final int a = 60;

public void fun();

}

Another interface C extends A & B

另一个接口C扩展了A和B.

Interface C extends A, B {    

public void fun();

}

A class D implements interface C

D类实现接口C.

Class D implements C {



public void fun() {

/* Some code */
}

}

What happens if i use D.a ? which one of the static variable a is inherited by the class D.

如果我使用D.a会怎么样?哪一个静态变量a是由类D继承的。

2 个解决方案

#1

Neither. When you do this, the reference to constant a becomes ambiguous, requiring you to specify which one you want explicitly:

都不是。执行此操作时,对常量a的引用变得不明确,要求您明确指定要显示的内容:

public int fun() {
    return a; // Get an error below
}

error: reference to "a" is ambiguous

错误:对“a”的引用含糊不清

public int fun() {
    return B.a; // Works fine
}

#2

It's ambiguous to the compiler and will cause an error when used, something like the field is ambiguous. Since the field is static, you can resolve against the class name, e.g. A.a or B.a.

它对编译器来说是模糊的,并且在使用时会导致错误,类似于字段是不明确的。由于该字段是静态的,因此您可以针对类名进行解析,例如A.a或B.a.

#1