java对int数值的处理。

如得到一个int数为：4523。怎么向上取整为5000。
4100 也向上取整为5000
同理但凡数值后面有值全部向上取整

应该是可以的

num = 4523;
num = (int)(Math.ceil(num/100.00)*100)

比较笨的办法......

Integer data = 4523;
String dataStr = data.toString();
int length = dataStr.length();
char[] array = dataStr.toCharArray();

    boolean isadd = false;
    for(int i = 1;i<length;i++){

        if(Integer.valueOf(String.valueOf(array[i])) > 0){

            isadd = true;
            break;
        }
    }
    Integer result = 0;
    if(isadd){

        for(int i = 1;i<length;i++){

            array[i] = '0';
        }
        Integer headNum = Integer.valueOf(array[0])+1;
        array[0] = headNum.toString().charAt(0);

        result= Integer.valueOf(String.valueOf(array));
    }else{

        result = data;
    }

    return result;

int num = 1250;//你的数字
int copy = num;
int scale = 10;
while(copy >= 10){
copy = num / scale;
scale = scale * 10;
}

scale = scale / 10;
if(num % scale !=0){
num = (copy+1)*scale;
}