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| <h1>FindBugs™ Fact Sheet</h1> |
| |
| <p> FindBugs looks for bugs in Java programs. It is based |
| on the concept of <i>bug patterns</i>. A bug pattern is a code |
| idiom that is often an error. Bug patterns arise for a variety |
| of reasons: |
| </p> |
| |
| <ul> |
| <li> Difficult language features |
| <li> Misunderstood API methods |
| <li> Misunderstood invariants when code is modified during maintenance |
| <li> Garden variety mistakes: typos, use of the wrong boolean operator |
| </ul> |
| |
| <p> FindBugs uses <i>static analysis</i> to inspect Java bytecode |
| for occurrences of bug patterns. |
| Static analysis means that FindBugs can find bugs by simply inspecting |
| a program's code: executing the program is not necessary. |
| This makes FindBugs very easy to use: in general, you should be |
| able to use it to look for bugs in your code within a few minutes of downloading it. |
| FindBugs works by analyzing Java bytecode (compiled class files), |
| so you don't even need the program's source code to use it. |
| Because its analysis is |
| sometimes imprecise, FindBugs can report <i>false warnings</i>, |
| which are warnings that do not indicate real errors. |
| In practice, the rate of false warnings reported by FindBugs |
| is less than 50%. |
| </p> |
| |
| <p> |
| FindBugs supports a plugin architecture allowing anyone to add new |
| bug detectors. The <a href="publications.html">publications page</a> |
| contains links to articles describing how to write a new detector |
| for FindBugs. If you are familiar with Java bytecode |
| you can write a new FindBugs detector in as little as a few minutes. |
| </p> |
| |
| <p> FindBugs is free software, available under the terms of the |
| <a href="http://www.gnu.org/copyleft/lesser.html">Lesser GNU Public License</a>. |
| It is written in Java, and can be run with any virtual machine compatible |
| with Sun's JDK 1.5. It can analyze programs written for any version |
| of Java. FindBugs was originally developed by Bill Pugh and David Hovemeyer. |
| It is maintained by Bill Pugh, and |
| a <a href="team.html">team of volunteers</a>. |
| </p> |
| |
| <p> FindBugs uses <a href="http://jakarta.apache.org/bcel/">BCEL</a> to |
| analyze Java bytecode. |
| As of version 1.1, FindBugs also supports bug detectors written using |
| the <a href="http://asm.objectweb.org/">ASM</a> bytecode framework. |
| FindBugs uses <a href="http://dom4j.org/">dom4j</a> |
| for XML manipulation. |
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