JVM Tutorials - Herong's Tutorial Examples - v5.13, by Herong Yang
Running Java Programs on JRockit R28.2.7
This section provides a tutorial example on how to compile and run Java programs using JRockit JVM R28.2.7 on Windows systems.
JRockit R28.2.7 has a built-in Java compiler. You can compile and run a Java program with JRockit as shown below:
>\progra~1\java\jrockit-jdk1.6.0_45-R28.2.7-4.1.0\bin\javac Hello.java >\progra~1\java\jrockit-jdk1.6.0_45-R28.2.7-4.1.0\bin\java Hello Hello world!
You can also compile a Java program with JDK 1.6 and run it on JRockit R28.2.7, because they are compatible:
>\Progra~1\java\jdk1.6.0_45\bin\javac Hello.java >\progra~1\java\jrockit-jdk1.6.0_45-R28.2.7-4.1.0\bin\java Hello Hello world!
But you can not compile a Java program with JDK 1.7 and run it on JRockit R28.2.7, because they are not compatible:
>\Progra~1\java\jdk1.7.0_45\bin\javac Hello.java >\progra~1\java\jrockit-jdk1.6.0_45-R28.2.7-4.1.0\bin\java Hello Exception in thread "Main Thread" java.lang.UnsupportedClassVersionError: Hello: unsupported classversion 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.... at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Could not find the main class: Hello. Program will exit.
Table of Contents
JVM (Java Virtual Machine) Specification
Java HotSpot VM - JVM by Oracle/Sun
java.lang.Runtime Class - The JVM Instance
java.lang.System Class - The Operating System
ClassLoader Class - Class Loaders
Class Class - Class Reflections
JVM Stack, Frame and Stack Overflow
Thread Testing Program and Result
CPU Impact of Multi-Thread Applications
I/O Impact of Multi-Thread Applications
Micro Benchmark Runner and JVM Options
Micro Benchmark Tests on "int" Operations
Micro Benchmark Tests on "long" Operations
Micro Benchmark Tests in JIT Compilation Mode
Micro Benchmark Tests on "float" and "double" Operations
►JRockit JVM 28.2.7 by Oracle Corporation
Downloading and Installing JRockit R28.2.7
►Running Java Programs on JRockit R28.2.7
Memory Footprint of JRockit R28.2.7
What Is JRockit Mission Control?
Running JRockit Mission Control
What JRockit Management Console