网易面试题 对String和java调用方法的考察

public class Example {
public static void main(String args[]){
String str=new String("good");
char[] chars={'a','b','c'};
Example example=new Example();
example.exchange(str,chars);
System.out.print(str+"and");
System.out.print(chars);
}

private void exchange(String str, char[] chars) {
str="test ok";
chars[0]='g';
}
}‘

答案打印出goodandgbc