Java에서 jar 패키지의 작동에 대한 자세한 소개가 있습니다.

package com.imooc.jardemo1;
import com.imooc.jardemo1.impl.Teacher;;

public class Welcome {
	public int num;
	public static void main(String[] args) {
		Teacher.greeting();
		Welcome welcome=new Welcome();
		Teacher lee=new Teacher();
		welcome.addTeacher(lee, 1, "gil");
		welcome.getTeaInfor(lee);
	}
	public void addTeacher(Teacher teacher,int id,String name) {
		teacher.id=id;
		teacher.name=name;
	}
	public void getTeaInfor(Teacher teacher) {
		String str="ID:"+teacher.id+" Name:"+teacher.name;
		System.out.println(str);
	}
}

package com.imooc.jardemo1.impl;

public class Teacher {
	public String name;
	public int id;
	public static void greeting() {
		System.out.println("Welcome!");
	}	
}

package com.imooc.jartest;
import com.imooc.jardemo1.Welcome;
import com.imooc.jardemo1.impl.Teacher;

public class JarTest {
	public static void main(String[] args) {
		Welcome.main(args);
		Welcome welcome=new Welcome();
		Teacher teacher=new Teacher();
		welcome.addTeacher(teacher, 2, "pelle");
		welcome.getTeaInfor(teacher);	
	}
}