如何理解Integer.parseInt源码？-灵析社区

今天在研究Java中`Integer.parseInt`的源码时，对于`int multmin = limit / radix;`这一句代码不太理解，请教一下为什么通过` result Character.MAX_RADIX) { throw new NumberFormatException("radix " + radix + " greater than Character.MAX_RADIX"); } boolean negative = false; int i = 0, len = s.length(); int limit = -Integer.MAX_VALUE; if (len > 0) { char firstChar = s.charAt(0); if (firstChar < '0') { // Possible leading "+" or "-" if (firstChar == '-') { negative = true; limit = Integer.MIN_VALUE; } else if (firstChar != '+') { throw NumberFormatException.forInputString(s, radix); } if (len == 1) { // Cannot have lone "+" or "-" throw NumberFormatException.forInputString(s, radix); } i++; } int multmin = limit / radix; int result = 0; while (i < len) { // Accumulating negatively avoids surprises near MAX_VALUE int digit = Character.digit(s.charAt(i++), radix); if (digit < 0 || result < multmin) { throw NumberFormatException.forInputString(s, radix); } result *= radix; if (result < limit + digit) { throw NumberFormatException.forInputString(s, radix); } result -= digit; } return negative ? result : -result; } else { throw NumberFormatException.forInputString(s, radix); } }