Jvm 1.8
JVM 1.8 Min and Max Heap Sizes
JVM 1.8 Min and Max Heap Sizes
Interview Questions. Difference between HashMap and LinkedHashMap. HashTable x ConcurrentHashMap. Difference between static, final and transient access modifier. What framework you use for integration tests. Answer Question. 2 people found this interview helpful. Java Developer Interview. The Java™ virtual machine (VM) is the platform-specific component that runs a Java program. At run time, the VM interprets the Java bytecode that has been compiled by the Java Compiler. The VM acts as a translator between the language and the underlying operating system and hardware.
My memory settings are...
That's 10 GB for both (it's a big app). It does top out at 10 GB (plus perm gen, etc), but it starts out only being about 1 GB. I want it to pre-allocate everything.
Is this a version 1.8 thing? I've searched all of the JVM/JDK/JRE docs for 1.8 and nothing indicates that it would be acting the way it is.
Any ideas?
Setting the -source and -target of the Java Compiler
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Sometimes when you may need to compile a certain project to a different version than what you are currently using. The javac can accept such command using -source and -target. The Compiler Plugin can also be configured to provide these options during compilation.
For example, if you want to use the Java 8 language features (-source 1.8) and also want the compiled classes to be compatible with JVM 1.8 (-target 1.8), you can either add the two following properties, which are the default property names for the plugin parameters:
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or configure the plugin directly:
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Note: Merely setting the target option does not guarantee that your code actually runs on a JRE with the specified version. The pitfall is unintended usage of APIs that only exist in later JREs which would make your code fail at runtime with a linkage error. To avoid this issue, you can either configure the compiler's boot classpath to match the target JRE or use the Animal Sniffer Maven Plugin to verify your code doesn't use unintended APIs. In the same way, setting the source option does not guarantee that your code actually compiles on a JDK with the specified version. To compile your code with a specific JDK version, different than the one used to launch Maven, refer to the Compile Using A Different JDK example.