The composition of the JDK (Java SE Development Kit)

1.javac (Java compiler) compiler

Using the command line Input JAVAC command to call the Java compiler, the process of compiling Java files, Javac will check whether the source program conforms to the Java syntax, no syntax

The problem is to compile the. java files into a. class file that Java can understand (execute).

2.Java Class Library (Java class libraries)

Example System.out.println is a member of the Java class Library.

3.Java Virtual Machine (Java machaine)

When you are finished compiling the. class file, enter java+ "file name" on the command line, and the procedure to run the Java program is to call the Java Virtual machine to run the Java program.

Java files do not run directly on windows and need to be run on the Java Virtual Machine platform.

The basic process for running a Java applet:

The composition of the JDK (Java SE Development Kit)