Java development environment and build "Hello world" program

 

1 JAVA installed Download

 https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2. Download the installation file

3. Install the JDK

4. Installation JRE

5. installation

6. Establish JAVA_HOME environment variable

7. Establish running path

8. Check the version of java

These are the establishment of a Java runtime environment; Let me build your first Java program

I practice java editor is: Codeblocks

Enter the following code

 class Main{
	public static void main(String args[]){
	    System.out.println("HELLO WORLD");
	}
}

1.System.out.println ( "HELLO WORLD"); (this is my italics)

2. I removed the public before class; 

 

Here are the results to compile and run

 

 

1.javac compiler (if compiling the following program appears successful)

2.java is running

3. I was re-built two successful (my colleagues say that the problem of the interface, in the end the problem was I was not too clear)

 

 

reference

https://www.cnblogs.com/kangjianwei101/p/5621723.html

https://www.cnblogs.com/lqyy/p/9385796.html

https://blog.csdn.net/peng86788/article/details/81296882