things that prevent cross-platformness your java web application

开发者_开发技巧

are there any things that once can do ignorantly that can prevent a java web application from being cross platform? (windows/linux/mac)

Tools I am planning to use are java/spring framework/hibernate

---

• Hard-coding file separators/paths.
• Using native libraries.
• Using Runtime.exec()
• Using sun.* classes (this may cause portability issues with non-Sun JVMs).

---

not honoring case-sensitivity in filesystem

---

Using system default character encoding for input/output when inappropriate

---

In addition to what Dan Dyer said:

• calling executables by a fixed path or of a fixed name
• assuming a certain shell command syntax will work properly (eg 2>&1 or something)
• deleting or renaming a file that some other process (or the same one!) might have open
• Making assumptions about the working directory (eg using relative paths to load resouces from the file system)