问题描述

java中怎么将一个字符数组反序

新手java中怎么将一个字符数组反序，不要new数组，只能使用一个字符数组，三克油

解决方案

可以用Collection.reverse(list)呀，先把你的数组放到List里，再Collection.reverse(list)，然后再从list中拿回来，示例代码：

public static void main(String[] args) {
        String[] deal = new String[3];
        deal[0] = "0";
        deal[1] = "1";
        deal[2] = "2";
        List<String> list = new ArrayList<String>();
        for (int i = 0; i < deal.length; i++) {
            list.add(i, deal[i]);
        }
        Collections.reverse(list);
        for (int i = 0; i < list.size(); i++) {
            deal[i] = list.get(i);
        }
        for (int i = 0; i < deal.length; i++) {
            System.out.println(deal[i]);
        }

    }

解决方案二：

public String[]dealwithstring(String[]deal){

    if(deal.length==0)
        return null;
    if(deal.length%2==0)
    {
    int l=deal.length;
    int c=deal.length/2;
    for(int i=0;i<c;i++){
        String change=deal[i];
        deal[i]=deal[l-1-i];
        deal[l-i-1]=change;
        }
    return deal;
        }           

    if(deal.length%2==1)
    {
    int l=deal.length;
    int c=deal.length/2;
    for(int i=0;i<c;i++){
        String change=deal[i];
        deal[i]=deal[l-1-i];
        deal[l-i-1]=change;

    }
    return deal;

    }

return null;

}