[Java] Java Trivia Summary 01

Title> first knowledge of Java

1> Small Concept

IDE (Integrated development environment) is a kind of software, which integrates the program development environment and the program debugging environment,
Tools that typically include code editors, compilers, debuggers, and graphical user interfaces help programmers develop software.

JRE (Java Runtime Environment,java Runtime Environment), a collection of environments necessary to run Java programs, including the JVM standard implementation and the Java Core Class library.  

The JDK is the Java language Software Development Toolkit for Java applications on mobile devices and embedded devices.
The JDK is the core of the entire Java development, which contains Java's runtime environment, Java tools, and Java-based class libraries.

2> Configuring environment variables

1 Configuration java_home:
In the system variable, click "Edit", enter the variable name: java_home
Variable Value: JDK installation directory ' D:\Program files\java\jdk1.8.0_121 '

2 configuration classpath:
In the system variable, click "Edit", enter the variable name: CLASSPATH
Variable value:.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar

3 Configure path:
At the end of the variable, enter:;%java_home%\bin;%java_home%\jre\bin
4 Click ' Start-run ', input ' cmd ', enter:
Input: javac-version, check the installation version

3> Summary

2017-04-190 9:08:53 by Blue ether

[Java] Java Trivia Summary 01