单选题

根据下面的程序代码，哪些选项的值返回true？()publicclassS...

Question

根据下面的程序代码，哪些选项的值返回true？()

public class Square {  

    long width  

    public Square(long l) {   

        width = l  

    }  

    public static void main(String arg[]) {   

        Square a, b, c   

        a = new Square(42L)   

        b = new Square(42L)   

        c = b   

        long s = 42L  

    }

}

A.

a == b

B.

s == a

C.

b == c

D.

a.equals(s)