新人笔记-权限修饰符与导包

package com_black.daobao.A1;

public class Teacher {
    public void teach(){
        System.out.println("good study,day day up");
    }
}



package com_black.daobao.A2;

import com_black.daobao.A1.Teacher;

public class Demo {
    public static void main(String[] args) {
        /*com_black.daobao.A1.Teacher t=new com_black.daobao.A1.Teacher();
        t.teach();

        com_black.daobao.A1.Teacher t2=new com_black.daobao.A1.Teacher();
        t2.teach();
         */
        //如果在上方输入import+包名   例如：import com_black.daobao.A1.Teacher;     则后面可以直接输入
        Teacher t=new Teacher();
        t.teach();
    }
}