I'm not sure if it's "useful" as much as it is the fact of it being how the Java compiler works.
However, there's a GCC frontend for compiling Java to native machine code rather than bytecode.
It is simply called the Java compiler. The actual program is usually called Javac.
The command is "javac".
The java interpreter or JVM (Java Virtual Machine) is not able to execute the java source code for a program. The java source code first needs to be compiled into bytecode that can be processed by JVM. Producing bytecode make the program platform independent as each platform has its own JVM. It is also possible to directly write bytecode, bypassing the need to compile, but that would be tedious job and also not good for security purpose as the compiler checks for various errors in a program.
The Java Runtime Environment (JRE) converts the byte code to machine language.
Java has both a compiled and an interpreted stage.1) The programmer writes his source codes (.java extension); a compiler will compile this to bytecode (.class extension).2) When the end-user runs the .class program, the JVM (Java Virtual Machine) will interpret this.
One can run and compile a Java applet program by agreeing to the terms and downloading it. It is possible to get a compiler online that will compile and run Java programs.
I'm not sure if it's "useful" as much as it is the fact of it being how the Java compiler works. However, there's a GCC frontend for compiling Java to native machine code rather than bytecode.
A Java compiler.
There is no way to do this in Java without using either JNI calls or executing an outside, platform-specific program.
Yes, executing a Java class will require memory just like any other program.
It means you have not installed jdk and jre in your machine...
That's short for Software Development Kit, and it is basically everything the programmer (developer) needs to program in Java. It includes the Java compiler, the Java Virtual Machine, and the Java base classes.