单选题

指出以下程序运行的结果是

Question

指出以下程序运行的结果是

public class Example{
    String str=new String("good")
    char[]ch={'a','b','c'}
    public static void main(String args[]){
        Example ex=new Example()
        ex.change(ex.str,ex.ch)
        System.out.print(ex.str+" and ")
        System.out.print(ex.ch)
    }
    public void change(String str,char ch[]){
   //引用类型变量，传递的是地址，属于引用传递。
        str="test ok"
        ch[0]='g'
    }
}

A. good and abc

B. good and gbc

C. test ok and abc

D. test ok and gbc