1、
(1)
In the code of “for (int i=x.length-1; i> 0; i--)”, it should be i>=0 instead of i>0.
(2)
If x is null, it will be thrown and do not execute the fault.
(3)
If the code doesn’t execute the code of “i=0”, it will not result in the error state.
Like: x=[1,2,3,4], y=[4].
(4)
If the error has no influence on the result, the program will not be afailure.
The input has no equal number like: x=[1,2], y=[3].
2、
(1)
It will return the first 0.
The code “for (int i= 0; i< x.length; i++)” should be changed into “for (int i= x.length-1; i>=0; i--)” .
(2)
If x is null, it will be thrown and do not execute the fault.
(3)
If x has only one zero, it won’t result in error state.
Such as x= [1,2,0].
(4)
If x has no zero, there is no failure.
For example x= [1,2,3].
