JAVASDK is a java development toolkit.

JAVASDK from Internet generally includes JVM.

Java Virtual Machine is a fictitious computer, which is realized by simulating various computer functions on the actual computer. Java virtual machine has its own perfect hardware architecture, such as processor, stack, register and so on. , and there is also a corresponding instruction system. The JVM shields the information related to the specific operating system platform, so that Java programs can run on various platforms only by generating the object code (bytecode) running on the Java virtual machine without modification. When Java virtual machine executes bytecode, it actually interprets bytecode as the execution of machine instructions on a specific platform.

JVM(Java virtual machine) is a specification of computing equipment, which can be implemented in different ways (software or hardware). Compiling the instruction set of a virtual machine is very similar to compiling the instruction set of a microprocessor. Java virtual machine includes a set of bytecode instruction sets, a set of registers, a stack, a garbage collection heap and a storage method domain.

Java Virtual Machine (JVM) is a virtual computer that can run Java code. As long as the interpreter is transplanted to a specific computer according to JVM specification, any compiled Java code can be guaranteed to run on this system.

Java virtual machine is a kind of virtual machine, which is realized by software simulation on the actual computer. Java virtual machine has its own imaginary hardware, such as processor, stack, register and so on. , and there is also a corresponding instruction system.