在类中实现父接口和子接口(类a实现父接口和子接口)

interface A {

    public void doSomething();
}

interface B extends A {

    public void doSomethingElse();
}

public class AClass implements A, B {

    public void doSomething() {}

    public void doSomethingElse() {}

}
interface A {

    public void doSomething();
}