Recent questions tagged jvm

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v2 is null when it enters A's c'tor at the first time, but if I put v2's declaration & initialization before ... v3 [ab] v4 [ab] end main See Question&Answers more detail:os...

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

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jvm - What Java code will force javac 1.6 to use the 'swap' and 'nop' opcodes?

I'm working on an amateur JVM implementation, and I'm trying to make sure I have test coverage for all of the ... 8: irem 9: ireturn Any ideas? See Question&Answers more detail:os...

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

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jvm - Why does Math.sin() delegate to StrictMath.sin()?

I was wondering, why does Math.sin(double) delegate to StrictMath.sin(double) when I've found the problem in a ... t Math.sin() native already? See Question&Answers more detail:os...

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

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jvm - Platform independence in Java's Byte Code

I sometimes wonder why Java is referred as a Platform Independent Language? I couldn't find a proper ... learning this basic concept. See Question&Answers more detail:os...

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

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jvm - Get deadlock detection from running programm or dump in Java

I have a piece of running java software that is jammed. I would like to get a view inside but have got no ... to know the enemy. Any ideas? See Question&Answers more detail:os...

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

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917 views

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jvm - Unable to Run Kotlin Application in Eclipse

In order to create my first, simple Kotlin project in Eclipse, I followed the steps in Getting Started with ... ). The problem persists. See Question&Answers more detail:os...

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

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jvm - Change Default Java VM to Client

I installed Oracle's Java on Fedora 17, and I noticed that when using the command java -version it returns ... change the default to client? See Question&Answers more detail:os...

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

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jvm - Is it safe to distribute tools.jar along with a Java application bundle?

Although tools.jar is not a component in JRE, but it comes with all major implementations of JDK such as Oracle ... can be put into classpath? See Question&Answers more detail:os...

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

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jvm - Change Default Java VM to Client

I installed Oracle's Java on Fedora 17, and I noticed that when using the command java -version it returns ... change the default to client? See Question&Answers more detail:os...

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

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jvm - How to calculate (and specify) the total memory space allowed for java process?

I have a system which cannot provide more than 1.5 Gb for Java process. Thus i need an exact way to specify ... doesn't ever try to do that. See Question&Answers more detail:os...

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

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1.0k views

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jvm - Find my application memory foot print programmatically

I am trying to measure my application memory foot print pragmatically. I am using java.lang.management class to ... usage of my application. See Question&Answers more detail:os...

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

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804 views

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jvm - Why is assert not enabled by default in java

My question is from the perspective of language design. Why is assert treated differently i.e. it raises a ... warnings based on assertions. See Question&Answers more detail:os...

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

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857 views

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jvm - Package-private class within a .java file - why is it accessible?

Consider the following code, where the HelloWorld class has default or package-private access: class HelloWorld { ... package-private access. See Question&Answers more detail:os...

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

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826 views

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jvm - Java `OutOfMemoryError` when creating < 100 threads

I've been reading and testing and banging my head on the wall for over a day because of this error. I have ... fedora-65.1.11.1.fc16-x86_64 See Question&Answers more detail:os...

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

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874 views

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jvm - Java method parameters values in ASM

I am trying to get the values of a Java program's method's parameters. I am using ASM to instrument the bytecode ... )V"); super.visitCode(); } See Question&Answers more detail:os...

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

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750 views

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jvm - Java method parameters values in ASM

I am trying to get the values of a Java program's method's parameters. I am using ASM to instrument the bytecode ... )V"); super.visitCode(); } See Question&Answers more detail:os...

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

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746 views

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jvm - Java method parameters values in ASM

I am trying to get the values of a Java program's method's parameters. I am using ASM to instrument the bytecode ... )V"); super.visitCode(); } See Question&Answers more detail:os...

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

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842 views

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jvm - In Java, are static class members shared among programs?

I imagine that no, they aren't, because every process has its own memory space, of course. But how ... some implementation? Websites? Books? See Question&Answers more detail:os...

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

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827 views

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jvm - Java -classpath option

Will the use of -classpath option with java, add to or replace the contents of the CLASSPATH env variable? See Question&Answers more detail:os...

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

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990 views

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jvm - embedded Java VM for Cortex M3

I'm currently searching for a Java VM which is portable (or already ported) to an ARM Cortex M3 ( ... ClassLoader? Thanks for your suggenstions. See Question&Answers more detail:os...

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

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942 views

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jvm - Run Java console app as a daemon (background)

I've developed a Java console application that when start, open a console window and remain in foreground, i want ... some change on my code ? See Question&Answers more detail:os...

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

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871 views

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jvm - java.util.Locale has an empty first item

I am trying to get all the locales from the JVM to populate a Country drop down. The first item is an empty not ... - (build 1.7.0_09-b05) See Question&Answers more detail:os...

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

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777 views

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jvm - How exactly does the Java interpreter or any interpreter work?

I have been figuring out the exact working of an interpreter, have googled around and have come up with some ... or in the underlying OS ? See Question&Answers more detail:os...

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

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833 views

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jvm - Java VMs that do not require an operating system?

I know that BEA was working on LiquidVM which didn't require an underlying operating system, but would like to know ... by the OS boot loader. See Question&Answers more detail:os...

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

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824 views

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jvm - Performance: greater / smaller than vs not equal to

I wonder if there is a difference in performance between checking if a value is greater / smaller than another for ... based on Java, sorry. See Question&Answers more detail:os...

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

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962 views

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jvm - How to increase intellij 32bit xmx more than 1GB?

I am using 32bit Intellij on my 32bit windows XP with 4 GB of RAM. I am attempting to increase intellij xmx ... more than 900MB Please help me! See Question&Answers more detail:os...

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

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1.0k views

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jvm - What is the maximum size of a Java .class file?

A .class file is a rather well documented format that defines sections and size, and therefore maximum sizes ... limits, disregard those values. See Question&Answers more detail:os...

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

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jvm - Java 8 reserves minimum 1G for Metaspace despite (Max)MetaspaceSize

Java 8 reserves 1G for Metaspace just after it starts. It means that minimum metaspace size is 1G. But ... reserved=1056768KB, committed=7680KB) See Question&Answers more detail:os...

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

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