Using the command line to compile and run Java classes
System Environment
Windows 10 64bit
Java 8 64
General Java class
java file
Current Location: c: \ java \ Hello.java
public class Hello {
public static void main(String main[]) {
System.out.println("Hello world!");
}
}
Compile
Current Location: c: \ java
javac *.java
run
Current Location: c: \ java
java Hello
Comprising the Java class package name (in the absence package configuration)
java file
java file
Current Location: c: \ java \ Hello.java
package com.study;
public class Hello {
public static void main(String main[]) {
System.out.println("Hello world!");
}
}
Compile
Current Location: c: \ java
javac -d . Hello.java
Description of the command:
-d: specifies the placement of the generated class files
: directory represents the operation of the class file, referred to herein as java directory
More Reference Description cmd: javac -help
run
Current Location: c: \ java
java com.study.Hello
Java class includes the package name (package name directory structure and consistency)
java file
Current Location: c: \ java \ com \ study \ Hello.java
package com.study;
public class Hello {
public static void main(String main[]) {
System.out.println("Hello world!");
}
}
Compile
Current Location: c: \ java
javac com\study\Hello.java
run
Current Location: c: \ java
java com.study.Hello
Jar with third-party classes (accounting positions added later)
java file
Compile
run
