java常用类 String面试题

public class StringText {
    String str="123";
    char num[]={'a','o','v','e'};



    public void change(String str, char[] num){
        str="2468";
        num[0]='l';
    }

    public static void main(String[] args) {

        StringText ch = new StringText();

        ch.change(ch.str,ch.num);

        System.out.println(ch.str);
        System.out.println(ch.num);

    }
}

输出结果

123
love