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Eclipse how to install dom4j how to#
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Eclipse how to install dom4j code#
It can also come as : but only if your code tries to load this class explicitly instead of JVM.
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When it will load WorkBook class it will try to load the referenced class from the DOM4j library and at that time if JVM didn't find those classes in CLASSPATH, it will throw : org/dom4j/DocumentException. But things work differently when your run the program, at that time JVM will look for all the binary code. When you compile your program like ExcelReader.java, then the compiler will only look for a class file that is directly referenced or required to generate the class file, it will not look for transitive dependencies.įor example, suppose you need WorkBook class from Apache POI, which internally uses dom4j library, the compiler will complain if poi.jar is not there, but will not complain even if dom4j.jar is not present because it's compiling your code, it's not compiling WorkBook class, it's already compiled because the class file of this code is already present in poi.jar. Alert and curious developers might ask, why it didn't fail during compile time if JAR was not present there? Well, the reason for that is that your code might not be using any class file directly from the dom4j.jar file.
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