字符串翻转

Java实现字符串翻转

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("输入需要反转的字符串：");
        String  a= scanner.next();
        System.out.println("反转下标起点：");
        int start = scanner.nextInt();//起始反转下标
        System.out.println("反转下标终点：");
        int end = scanner.nextInt();//终止反转下标
        a = reverse(a,start,end);
        System.out.println(a);
    }
public static String reverse(String str, int start, int end){
        char[] chars = str.toCharArray();//将字符串转换成char的形式储存；
        char temp = ' ';//临时变量
        for(int i = start, j = end; i < j; i++, j--){
            temp= chars[i];
            chars[i] = chars[j];
            chars[j] = temp;
        }
        return new String(chars);//返回字符串；
    }