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Just type in your command line this:
java -version
If you have the java installed in your machine the above command show you the version installed.
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What is a java lang unsupported class version error?
This is an error you receive when your Java Virtual Machine or JVM attempts to read a file but the version numbers are not supported. This can happen in cases where your version of JVM is higher than the version used for that file.
Can you have more than one jvm?
Yes you can. PS: Each JRE version would have a different JVM. If you have multiple JRE versions in your machine then you would have multiple JVMs
What is purpose of JVM?
JVM stands for Java Virtual Machine The JVM is the system in which our Java programs are executed.
Is JVM is part of compiler?
no jvm is not a part of java compiler
Why java is plateformindepedent?
Java enabled machines (PC, Mac, Smart Phones,etc.) all have their own version of whats called the JVM (or java virtual machine). The JVM takes source code written by programmers and converts into the corresponding machine code. For example a JVM running on a PC would convert the source into machine code corresponding to a PC and so on.
How one jvm call another jvm?
As of Java 6 every JVM runs an MBeanServer which you can connect to via a JMX RMI connection and then invoke methods on services hosted in the remote JVM's Mbean server.
Is JVM a software or hardware?
JVM stands for Java Virtual Machine, it is software.
Is Jvm in the system?
The JVM (Java Virtual Machine) is a part of the JRE (Java Runtime Environment).The JRE is comprised of the JVM and the Class Library.The JVM takes the java language and compiles it into Bytecode which can then be interpreted as machine code by the platform(OS). The JVM will compile byte code specific to the OS it is being deployed upon. The JVM allows the Java language to be platform independent.
Should all the devices have jvm to run java application?
There are relatively few devices that don't have a JVM implementation, but it is not true that all devices should have a JVM.
Why main method only called by jvm why not any other our own static method?
At the time of developing jvm the development team by default make a only one method call i.e; 'main' method call in the jvm that's why when the call is loading into the jvm the jvm call the main method...and execution was starts..
What is the role of class path environment variable?
The class path environment variable helps the JVM identify the location in the machine where the JVM can pick up the java class file that needs to be executed. If you place java class files in any place that is not a part of the class path, the JVM may not be able to find the class to execute.
How many threads run at the start of JVM?
at the starting of the JVM it handels approx 7000 threads .........
