即使语句有效,也不输入if条件

Question

我的代码中的错误,即使"A","B","C"存在于数组中,内部循环内的if条件也无法识别它们.请注意,ABC来自使用String.split("")分割的字符串; java的方法

public class Hexadecimal
{
    public static void main(String[] args)
    {
            String hex = "ABC";
            hToD(hex);
    }

    public static void hToD(String hexa)
    {
        String[] hexadecimal = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};
        String[] value = hexa.split("");

        int deci = 0;
        int bit =0;

        for(int i = 0; i<value.length;i++)
        {
            for(int j = 0; j<hexadecimal.length;j++)
            {
                if(value[i] == hexadecimal[j])
                {
                    deci = deci + compute(j,bit++);
                    System.out.println(deci);
                }
            }
        }
    }

    public static int compute(int digit,int bit)
    {
        int ans = 0;
        if(bit == 0)
        {
            ans = digit * (1);
        }else
        {
            ans = digit * (16 * bit);
        }
        return ans;
    }
}

Answer 1

永远不要比较字符串==.永远与s1.equals(s2).

前者测试两个对象是否相同(即变量引用相同的String对象).后者测试两个字符串的字符序列是相同的.