public static boolean isOutOfBounds(int index, int length, int capacity) {
return (index | length | (index + length) | (capacity - (index + length))) < 0;
}
public static boolean isOutOfBounds(int index, int length, int capacity) {
return (index | length | (index + length) | (capacity - (index + length))) < 0;
}
验证一个数组（buffer）中 capacity，index，length 是否合法的方法（代码来自Netty 的byteBuf）
原文：https://www.cnblogs.com/foxhasdream/p/8679163.html