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whenever they say run a .class file in JVM. do they mean with the command "java" in the terminal.
or can you click on it to open it?
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The java command starts a Java application. It does this by starting the Java Virtual Machine (JVM), loading the specified class, and calling that class's main() method. The method must be declared public and static , it must not return any value, and it must accept a String array as a parameter.
Use these options to configure your JVM. The options prefixed with -X are nonstandard. Options that relate to the JIT are listed under JIT and AOT command-line options. Options that relate to the Garbage Collector are listed under Garbage Collector command-line options.
The JNI supports an Invocation API that allows you to load, initialize, and invoke the Java Virtual Machine. Indeed, the normal way of starting the Java interpreter, java , is no more than a simple C program that parses the command line arguments and invokes the Java Virtual Machine through the Invocation API.
The java command starts a Java application. It does this by starting a Java runtime environment, loading a specified class, and calling that class's main method. By default, the first argument without an option is the name of the class to be called. A fully qualified class name should be used.
Yes, if you have the JRE installed, java should be the JVM.
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A java file is compiled into a class file, which is a bunch of java bytecode. The JVM is the thing that can execute java bytecode.
java is a command line tool that is part of a java runtime environment (JRE) that knows how to start a java virtual machine, load and execute your class file.
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