how to write this code, who can help on skype or here?

Question

//I try to learn java and make an application. please help me on skype:
//[e-mail]

think we have an university:
1.teachers Name, ID
2.students Name, ID
3.chemicals Name, ID, Formula, Cost, Consumption, TotalCost(Cost * Consumption)
* each teacher has some students.

input of application is:
Teacher ID, student ID, chemical ID, chemical Consumption
output of application is:
teachers Names + chemicals Name + chemicals Consumption + TotalCost
students Names + chemicals Name + chemicals Consumption + TotalCost
chemicals Name + chemicals Consumption + TotalCost
for Example:
Teachers{
Jack, ID=100{ Students (Mary, ID = 101), (Robert, ID = 102) }
Mick, ID=120{ Students (Anderson, ID = 121) }
}

Chemicals{
Name =Sodium Chloride, ID=1, Formula = NaCl, Cost = 0.2$
Name =Sodium Hydroxide, ID=2, Formula = NaOH, Cost = 1.2$
}

Mary consume 25 grams of NaCl
Robert consume 8 grams of NaOH
Anderson consume 13 grams of NaCl

input:

100, 101, 1, 25
100, 102, 2, 8
120, 121, 1, 13

output1 (Teachers):

jack
Sodium Chloride 25 gr 5$
Sodium Hydroxide 8 gr 9.6$
------------------------------------
Total Cost 14.6$

Mick
Sodium Chloride 13 gr 2.6$
------------------------------------
Total Cost 2.6$
output2 (Students):

Mary
Sodium Chloride 25 gr 5$
Robert
Sodium Hydroxide 8 gr 9.6$
Anderson
Sodium Chloride 13 gr 2.6$
output3 (Chemicals):

Sodium Chloride 38 gr 7.6$
Sodium Hydroxide 8 gr 9.6$

Answer 1

create an overriding toString method 😊
https://www.sololearn.com/discuss/396590/?ref=app

Answer 2

public class Teacher { }
public class Student { }
public class Chemical { }

Answer 3

// done : class details
// to do : print report
package chemistry;
import java.util.ArrayList;

public class University {
public static void main ( String [ ] args ){
ArrayList <Student> lstStud = new ArrayList <>();
lstStud.add (new Student("Mary",101));
lstStud.add (new Student("Robert",102));
lstStud.add (new Student("Anderson",121));

ArrayList <Chemical> lstChem = new ArrayList <>();
lstChem.add (new Chemical("Sodium Chloride",1, "NaCl", 0.1));
lstChem.add (new Chemical("Sodium Hydroxide",2,"NaOH",1.2));

ArrayList <Teacher> lstTeach = new ArrayList <>();
lstTeach.add (new Teacher("Jack",100));
lstTeach.add.get (0).addStudent(lstStud.get (0));
lstTeach.add.get (0).addStudent(lstStud.get (1));
lstTeach.add (new Teacher("Mick",120));
lstTeach.add.get (1).addStudent(lstStud.get (2));
}
}
class Identity {
private String name;
private int id;
public Identity (String name, int id){
this.name= name;
this.id=id;
}
}
class Student extends Identity{
public Student (String name, int id){
super (name,id);
}
class Teacher extends Identity {
ArrayList <Student> listStudent = new ArrayList <>();
public Teacher (String name, int id){
super (name, id);
}
void addStudent (Student student){
listStudent.add (student);
}
}
class Chemical extends Identity {
private String formula;
private double cost;
public Chemical (String name, int id, String formula, double cost){
super (name,id);
this.formula= formula;
this.cost= cost;
}
}

Answer 4

Nice question.
general advice
Try to create classes for Teacher Student and Chemicals
add the appropiate attributes for your classes
add the appropiate behavior for your classes

Answer 5

Output is information about lstTeach which is an ArrayList of Teacher objects.
For every object you get the information about:
package name = chemistry
. = separation sign
class name = Teacher
@ = separation sign
1db9742 = hashcode hexadecimal.

Answer 6

anybody don't help with details here
:((((
I'm beginner in java.

Answer 7

creating class is simple unit of that, after that?

Answer 8

how can get this arraylists information?
for example all teachers name or al students name?

Answer 9

ok, I ask here

Answer 10

I'm beginner in java and I try to create this Classes more than 5 times, but cant give aim.

Answer 11

thank you NimWing Yuan.
please try to add this statement and run app
System.out.println(lstTeach);
output:
[chemistry.Teacher@1db9742, chemistry.Teacher@106d69c]

what is it?