单选题 指出下列程序运行的结果 public class Example { String str = new String 答案 "good" ; char[] ch = { 'a', 'b', 'c' }; public static void main 答案 String args[] { Example ex = new Example 答案 ; ex.change 答案 ex.str, ex.ch ; System.out.print 答案 ex.str + " and " ; System.out.print 答案 ex.ch ; } public void change 答案 String str, char ch[] { str = "test ok"; ch[0] = 'g'; } }