Question

Design a set of classes that keeps track of demographic information about a set of people, such as age, nationality, occupation, income, and so on. Design each class to focus on a particular aspect of data collection. Assume the input data is coming from a text file. Create a main driver class to instantiate several of the classes.

Answer 1

Place demographic.txt file in project structure with below details in it:

0001,George,26,NYC,US,123,Engineer,10000,FedEx,Dinklage,Christ
0022,John,22,IL,US,144,Sr. Engineer,15000,Macy's,Boston,Christ
0033,Ram,29,CH,US,567,Engineer,11000,Delloitte,Sharma,Hindu
0056,Bryan,20,NYC,US,67,Worker,8000,Shop,Page,Christ
0011,Thomas,45,MH,US,898,Doctor,30000,Central Hospital,Lewis,Christ

Driver class: Demographic.java

package com.demographic;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class Demographic {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
      
       BufferedReader reader;
       try {
           reader = new BufferedReader(new FileReader("demographic.txt"));
           String line = reader.readLine();
           while(line!=null)
           {
               String[] str = line.split(",");
               Personal p = new Personal();
               Professional pr = new Professional();
               Social s = new Social();
               line = reader.readLine();
               p.setId(Integer.parseInt(str[0]));
               p.setName(str[1]);
               p.setAge(Integer.parseInt(str[2]));
               p.setAddress(str[3]);
               p.setNationality(str[4]);
               pr.setEmpid(Integer.parseInt(str[5]));
               pr.setOccupation(str[6]);
               pr.setIncome(Double.parseDouble(str[7]));
               pr.setOrg(str[8]);
               s.setFamily(str[9]);
               s.setReligon(str[10]);
              
               System.out.println("Demographic details for id "+p.getId()+" is registered!");  
           }
          
       }
       catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           System.out.println("file not found");
           e.printStackTrace();
       }
       catch (Exception e) {
           // TODO Auto-generated catch block
           System.out.println("Other exception");
           e.printStackTrace();
       }

      
   }

}

Personal.java

package com.demographic;

public class Personal {
private int id;
private String name;
private int age;
private String address;
private String nationality;

public int getId() {
   return id;
}
public void setId(int id) {
   this.id = id;
}
public String getName() {
   return name;
}
public void setName(String name) {
   this.name = name;
}
public int getAge() {
   return age;
}
public void setAge(int age) {
   this.age = age;
}
public String getAddress() {
   return address;
}
public void setAddress(String address) {
   this.address = address;
}
public String getNationality() {
   return nationality;
}
public void setNationality(String nationality) {
   this.nationality = nationality;
}

}

Professional.java

package com.demographic;

public class Professional {
   private int id;
   private int empid;
   private String occupation;
   private double income;
   private String org;
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public int getEmpid() {
       return empid;
   }
   public void setEmpid(int empid) {
       this.empid = empid;
   }
   public String getOccupation() {
       return occupation;
   }
   public void setOccupation(String occupation) {
       this.occupation = occupation;
   }
   public double getIncome() {
       return income;
   }
   public void setIncome(double income) {
       this.income = income;
   }
   public String getOrg() {
       return org;
   }
   public void setOrg(String org) {
       this.org = org;
   }
  
  
}

Social.java

package com.demographic;

public class Social {
   private int id;
   private String family;
   private String religon;
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getFamily() {
       return family;
   }
   public void setFamily(String family) {
       this.family = family;
   }
   public String getReligon() {
       return religon;
   }
   public void setReligon(String religon) {
       this.religon = religon;
   }

  
}

Output:

Demographic details for id 1 is registered!
Demographic details for id 22 is registered!
Demographic details for id 33 is registered!
Demographic details for id 56 is registered!
Demographic details for id 11 is registered!