下面程序最后输出的结果是( )public class A{ String str=new String(“good”); char[] ch={‘a’,’b’,’c’}; public static void main(String args[]){ A ex=new A(); ex.change(ex.str,ex.ch); System.out.print(ex.str+””+ex.ch[0]); } public void change(String str,char ch[]){ str=”test ok”; ch[0]=’g’; }}
A. good a
B. good g
C. test ok a
D. test ok g