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[]){
str = "test ok";
ch[0] = 'g';
}
}
为什么运行结果str为“good”？