Analyzing Java memory usage in a Docker container

A few weeks ago I faced an interesting problem trying to analyze a memory consumption in my Java application (Spring Boot + Infinispan) running under Docker. The Xmx parameter was set to 256m, but the Docker monitoring tool displayed almost two…

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Java Double Class

Java.lang package provides a Double class which wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double. (more…)

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Hour of Code: Build Your Robot World in Java

Learn the basics of coding while driving a simulated robot through a maze. By the end of this tutorial, you'll be able to use variables, use Java commands called methods, generate random numbers, and use coding constructs, loops, to instruct the computer ...

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