Question

If we have a package name, say .. com.google.foo.bar and it has classes like

com.google.foo.bar.xyz

com.google.foo.bar.abc

. .

How can I get those names at runtime? By absolute, I mean… package name+class name. Is there any term for that?

Answer 1

public String getSourceBase(Class<?> classx)
{
    String cn = classx.getName().replace('.', '/') + ".class";
    // like "packagex/SourceBase.class"

    String s = classx.getResource('/' + cn).toExternalForm();
    // like "file:/javadir/Projects/projectX/build/classes/packagex/SourceBase.class"
    // or "jar:file:/opt/java/PROJECTS/testProject/dist/testProject.jar!/px/SourceBase.class"

    return s.substring(0, s.lastIndexOf(cn));
    // like "file:/javadir/Projects/projectX/build/classes/"
    // or "jar:file:/opt/java/PROJECTS/testProject/dist/testProject.jar!/"

}