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 '); Sytem.out.print(ex.ch); } public void change(String str,char ch[]){ str='test ok'; ch[0]='g'; } }