Runtime Questions

Learn how to troubleshoot and resolve the java.lang.NoClassDefFoundError when initializing classes in Java applications.

Learn how to execute command line programs in Java with Runtime.getRuntime and capture their output effectively.

Learn how to dynamically change Log4j logging levels at runtime without redeploying your application and understand their permanence.

Learn how to fix the Java error opening registry key SoftwareJavaSoftJava Runtime Environment.3 and missing Java.dll issues on Windows.

Explore the differences between compile time and run time dependencies in Java including their implications on the class path.

Learn how compiletime and runtime dependencies differ with simple explanations and examples. Understand their significance in Java and dependency management tools.

Discover why Class.newInstance is considered bad practice in Java and explore best alternatives with examples.

Explore the possibilities of dynamically adding Java annotations to methods at runtime with detailed explanations and coding insights.

Learn how to add a timeout parameter to Javas Runtime.exec method to prevent hanging commands with a simple solution.

Learn how to dynamically load and reload JAR files in Java enabling your application to add new code while ensuring constant uptime.

Learn how to add or modify files in Java classpath at runtime including the implications and techniques. Discover common mistakes and debugging tips.

Learn how to accurately measure the memory usage of your Java application using the Runtime API including common pitfalls and best practices.

Learn how to set the JVM heap size at runtime in Java including methods tips and potential pitfalls.

Explore the possibilities of hot swapping methods in Java at runtime similar to Erlangs hot code swapping and methods to achieve it.

Understanding JVM stack heap and thread mapping to physical memory and comparing Java with C runtime data areas.

Learn how to debug your Java JAR file at runtime using logging methods and debugging strategies to monitor execution flow and identify issues.

Learn how to set the default Java installation on Windows maintaining JDK usage without disruption from JRE installs. Stepbystep guide included.

Learn how to capture and print the OutputStream of a Java process initiated with exec to the console with detailed examples.

Learn how to check for Java annotations at runtime in constructor parameters using reflection focusing on Line and Cell annotations.

Discover the most frequently encountered runtime exceptions in Java their causes and solutions to effectively handle them.