Recent questions tagged jvm

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jvm - Case sensitivity of Java class names

If one writes two public Java classes with the same case-insensitive name in different directories then both ... custom class loader work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Release java memory for OS at runtime.

Suppose I have a Swings Java Application, I set the min Heap is 64MB and max Heap 2GB, when the user start the ... . Can I do that? Thanks, See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Trace java bytecode stream

I would like to see the current (bytecode) instruction stream of the JVM it is executing. After some googleing, ... stream. However, I am curios See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - how to increase java heap memory permanently?

I have one problem with java heap memory. I developed one client server application in java which is run as ... increase the default heap size? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Reducing size of JRE

We bundle the Java 6 JRE with our application installer so that it can be run on any machine, but this ... guidance to move forward with this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Java: What is the difference between <init> and <clinit>?

I am unable to understand the following text... Does it mean that <clinit> is for empty constructors? ... of the class initialization process. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - What java.security.egd option is for?

In a project I'm working on, the application is launched using a command similar to this: java -Djava.security. ... it supposed to be applied? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - programmatically setting max java heap size

Is there a way to set the max java heap size programmatically instead of as a vm argument? Something like: System ... heap variable>", "1000m"); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Java seems to ignore -Xms and -Xmx options

I'd like to run a very simple bot written in java on my VPS. I want to limit jvm memory to let's say ... write the program, not the JVM itself. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Java heap Xms and linux free memory different

I have a java program running in centos Box. My -Xmx and -Xms set to 4000 Mb. The program works fine. ... as java -Xms41000m -Xmx42000m -jar See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Android-Studio : Error: Could not create the Java Virtual Machine

I have just installed Android - studio today. First I have to install jdk7 for this IDE. After that only I was ... What is missing from my side? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Duplicated Java runtime options : what is the order of preference?

Considering the following command line java -Xms128m -Xms256m myapp.jar Which settings will apply for JVM Minimum memory ( ... : 128m or 256m ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - What is the point of invokeinterface?

I'm reading this article about how JVM invokes methods, and I think I got most of it. However, I'm still ... actual type. What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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598 views

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jvm - Bytecode features not available in the Java language

Are there currently (Java 6) things you can do in Java bytecode that you can't do from within the Java language ... one is for a future version. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Java VM: reproducible SIGSEGV on both 1.6.0_17 and 1.6.0_18, how to report?

EDIT: This reproducible SIGSEGV happens on a Linux machine with more than one proc and more than 2GB of mem, so ... because it's not important? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

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jvm bytecode - Tool to read and display Java .class versions

Do any of you know of a tool that will search for .class files and then display their compiled versions? I know ... to Java6 for some reason). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - Scope of the Java System Properties

In Java we use System.setProperty() method to set some system properties. According to this article the use ... the ease of problem detection) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - How to emit and execute Java bytecode at runtime?

I am writing an interpreter in Java for a domain-specific language with some scripting capabilities. I have ... for emitting Java bytecode? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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652 views

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jvm - Maximum number of parameters in Java method declaration

What is the maximum number of parameters that a method in Java can have and why? I am using Java 1.8 on ... only to clarify the exact behavior. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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754 views

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jvm - Java verbose class loading

I am trying to list the order in which the Java class loader is loading my classes. if I use -verbose ... class my main method is defined? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jvm - How do I write a correct micro-benchmark in Java?

How do you write (and run) a correct micro-benchmark in Java? I'm looking for some code samples and ... iterations/time, and why? Related: Is stopwatch benchmarking acceptable?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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