java command

java -cp

java -cp @./java-app/classpath-file com.mflyyou.HelloWorld

java -cp @/Users/panqinzhang/dev_test/java-app/classpath-file com.mflyyou.HelloWorld

.
├── libs
├── classes
│   └── com
│       └── mflyyou
│           ├── HelloWorld.class
└── classpath-file

// HelloWorld
package com.mflyyou;

public class HelloWorld {
    public HelloWorld() {
    }

    public static void main(String[] args) {
        System.out.println("Hello world");
    }
}

# classpath-file
# 或者 ./java-app/classes:./java-app/libs
/Users/panqinzhang/dev_test/java-app/classes:/Users/panqinzhang/dev_test/java-app/libs/spring-boot-starter-actuator-2.7.12.jar

java -D

set a system property java -DAA=BB MyProgram