This code is casting the result of calling toArray() on a collection to a type more specific than Object[], as in: String[] getAsArray(Collection<String> c) { return (String[]) c.toArray(); } This will usually fail by throwing a ClassCastException. The toArray() of almost all c...
The code uses x % 2 == 1 to check to see if a value is odd, but this won't work for negative numbers (e.g., (-5) % 2 == -1). If this code is intending to check for oddness, consider using x & 1 == 1, or x % 2 != 0. 奇偶检测逻辑,未考虑负数情况. 7.实际项目中...
Keep Calm And Find That Bug项目 2024/09/25 Memory in the hardest bug I've debugged Debugging memory leak with resource exhaustion detector warning 2004. Hi guys, in this post, I will share a sample of debugging memory leak issue with resource exhaustion... Date: 06/17/2017 Not enough ...
This code checks to see if a floating point value is equal to the special Not A Number value (e.g., if (x == Double.NaN)). However, because of the special semantics of NaN, no value is equal to Nan, including NaN. Thus, x == Double.NaN always evaluates to false. To check to...
基于Bug Patterns 概念,查找Javabytecode 中的潜在 bug。在目前版本中,它不检查 java 源文件。 主要检查 bytecode 中的 bug patterns,也允许用户自定义特定的 bug patterns。 PMD 检查java 源文件中的潜在问题。 主要包括: - 空 try/catch/finally/switch 语句块 ...
this.a = str; } findbugs描述为: This code stores a reference to an externally mutable object into the internal representation of the object. If instances are accessed by untrusted code, and unchecked changes to the mutable object would compromise security or other important properties, you will...
This happened in 2007 when a man from Pennsylvania, Chris Reynolds had $92 quadrillion transferred to his account because of a bug. This made him the richest man in the world and 100 times richer than the entire GDP of the whole planet. Paypal realized this mistake and reverted the account...
The code uses x % 2 == 1 to check to see if a value is odd, but this won't work for negative numbers (e.g., (-5) % 2 == -1). If this code is intending to check for oddness, consider using x & 1 == 1, or x % 2 != 0. ...
This static field public but not final, and could be changed by malicious code or by accident from another package. The field could be made final to avoid this vulnerability. protected static Logger logger = LoggerFactory.getLogger(DeliverWebRequestAction.class); ...
2. IM_BAD_CHECK_FOR_ODD Bug: Check for oddness that won't work for negative numbers Pattern id: IM_BAD_CHECK_FOR_ODD, type: IM, category: STYLE 解释：如果row是负奇数，那么row % 2 == -1，解决方法：考虑使用x & 1 == 1或者x % 2 != 0 Class doesn't override equals in super...