class Solution {
public int reverse(int x) {
String str = x + "";
StringBuffer resBuffer = new StringBuffer(32);
StringBuffer strBuffer = new StringBuffer(str);
char charArray [] = strBuffer.toString().toCharArray();
int add = 0;
for (int i = 0; i<charArray.length; i++) {
char c = charArray[i];
if (c == '-' && i == 0) {
resBuffer.append(c);
add = 0;
continue;
} else if (c != '-' && i == 0) {
add = 1;
}
int index = charArray.length-i-add;
char str1 = charArray[index];
String tempStr = resBuffer.toString();
if (tempStr.contains("-")) {
tempStr = tempStr.substring(0, 0) + tempStr.substring(1);
}
Integer tempInteger;
int tempInt = 0;
if (tempStr.length()!=0) {
Double tempDouble = Double.parseDouble(tempStr);
tempInt = tempDouble.intValue();
}
if (str1 == '0' && charArray.length>1 && tempInt == 0) {
continue;
} else {
resBuffer.append(str1);
}
}
String resStr = resBuffer.toString();
long l = Long.parseLong(resStr);
if (l <= Math.pow(-2, 31) || l >= Math.pow(2, 31) - 1){//如果溢出，则将结果设为0，跳出循环。
l=0;
}
return (int)l;
}
}
