A Java virtual machine (JVM) is a process virtual machine that can execute Java bytecode. It is the code execution component of the Java platform.
Here at IDRSolutions, one of the features of our JPedal library is a PDF to image converter. Occasionally we get bug reports from our customers, and if there is an issue in our code we can generally fix it very quickly. However, sometimes we see issues which are specific to the JVM and these can…
It’s hard to put a label on VisualVM – it has a profiler, but it’s more than that. It also has tools for tracking threads, interacting with garbage collection, and monitoring memory and CPU usage. What you might not realise is that you almost certainly have VisualVM installed – it’s been included as a standard…
When we load up PDF images we use a number of optimisations. One of these is to down-sample the images to reduce their size if possible. So if you have a 10000×10000 pixel image in the PDF file which is displayed as a 10×10 pixel image on the PDF page, we can make it a…
New Java versions are an exciting event. In addition to the bug fixes (and new bugs!) in the JVM, a Java version often adds new methods and classes in the new release. This is generally a good thing because the Java language can grow and develop. But what about backwards compatability? If you only use…
The built in garbage collection in the JVM is designed so that when an object is no longer alive (can not be referenced from any of the “roots” that are always accessible to the application) then the object can be removed as it is no longer required. This mechanism works well as it allows us…
