The result of java.nio.ByteBuffer.allocate(1000) is a JVM heap-allocated structure of 1,059 bytes, but the result of ByteBuffer.allocateDirect(1000) appears to be just 140 bytes; that’s because ...

Per-Åke Minborg, Consulting Member of Technical Staff, Java Core Libraries at Oracle, presented “Function and Memory Access in Pure Java” at JavaOne 2025. Minborg demonstrated how the Foreign ...

Memory allocation issues are only a subset of the problems common to C/C++ that cause potential bugs and vulnerabilities, but they are a large subset and are very annoying to track down and fix.

Most commonly used JVM parameters Of all the JVM options listed above, the most commonly used are Xms and Xmx, which set the minimum and maximum heap size, respectively. The following example sets the ...