| Logging not wrapped in if block | |
| Public method without logging | |
| Logger constructed without the current class name as argument. | |
| Configure Log4J in a file | |
| Prohibitted Log4J levels | |
| Class name with forbidden name component | |
| JDBC close order | |
| JDBC connection createStatement() | |
| Look for ArrayIndexOutOfBounds errors statically | |
| Read or write on non-buffered stream | |
| Static initializer which creates an instance before all static variables are initialized | |
| getClass().getResource() | |
| Inefficient use of keySet iterator rather than entrySet iterator | |
| Constant month outside range of 0..11 | |
| Duplicate switch branches | |
| Command-Query separation | |
| Long Mesage chain | |
| Constants with equal value | |
| Inaccessible matching methods | |
| Complex assignments | |
| Mixed logical operators without parentheses | |
| Use of XML class without factory | |
| Thread started multiple times | |
| Thread started without being named. | |
| Eternal thread | |
| Poor handling of interrupted flag | |
| lock for atomic operation | |
| Daemon thread | |
| Looping thread doesn't check for interrupt | |
| join() on eternal thread | |
| Splittable lock |