How to compile java files using the command line

Command line compile java file

import java.util.*;
public class shuchu{
    public static void main(String[] args) {
    Scanner in=new Scanner(System.in);
    System.out.print("what is your name?");
    String name =in.nextLine();
    System.out.print("How old are you?");
    int age=in.nextInt();
    System.out.print("Holle,"+name+".Next year,you'll be "+(age+1)+".");
    }
}

1. Use Notepad or Notepad to write a complete java file and save it as a .java file.

2.cmd, open the command prompt

3. Enter the .java file directory and enter the command: cd location

4. Type the command, javac file name.java.

#The Java compiler javac can convert .java source code files into executable .class bytecode files. Successful compilation will automatically generate a .class file.

#5. Type the command, java file name. Note that it must also be in the .class file directory at this time. If not, repeat the third step. And there is no need to add the .class suffix after the file name in this step! ! !

Run successfully! ! !

javaCompile Java source code on the command line

Compile Java source code on the command line

• ##@author jasmyn

• Enter the javac -version command on the command line to view JDK related information and commands.

• javac command is used to compile and convert (.java) source files into (.class) files.

• Then use the java command to run the compiled file.

• Find the directory where the java file is located in cmd, enter the (javac HelloWorld.java) command,

• After automatically generating the HelloWorld.class file , continue to enter the command (java HelloWorld).

Take HelloWorld as an example:

I don’t know why the runtime with package always No, Baidu has solved it later.

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