Question

You will generate a People

class of object and load an ArrayList with person objects, then report the contents of that ArrayList. To do so, you must

perform the following:

(30 pts.)

A) (15/30 pts.

(line break, 11 pt)

) - Create a class file “People.java” (which will generate People.class upon compile). People.java will

have eight(8) methods to

1) read a .txt file ‘people.txt’

2) generate:

▪ List of all students AND teachers

▪ List of all students OR teachers

▪ List of all female or male students OR teachers

▪ List of female or male students OR teachers whose age is greater than or equal to given age

▪ List of female or male students OR teachers whose age is greater than or equal to given age1

and less than given age2

▪ List students OR teachers whose age is greater than or equal to given age

▪ List students OR teachers whose age is greater than or equal to given age1 and less than given

age2 (line break, 11 pt)

2. B) (3/30 pts.) – When you instantiate your class with new, you must use the text file name (eg. People p = new People ("people.txt"))

3. C) (10/30 pts.) – You are required to use “Constructor”, “ArrayList” and “Overloading” concepts.

   [Example of Main()]→This is an example. I will test all cases.

   public static void main(String[] args)throws FileNotFoundException { People p =new People("people.txt");

D) Once your People.class is functional, generate a file “Assg05_yourName.java”.

Assg05_yourName.java should contain only one Main() method.

p.list();
p.list("s");
p.list("t","f");
p.list("s","f", 20); // List of female students whose age>=20

// List of students AND teachers)
// List of students
// List of female teachers

p.list("s","f", 15, 20); // List of female students whose age>=15 and age<=20

p.list("s", 20); // List of students whose age>=20

p.list("s", 15, 20); // List of students whose age>=15 and age<=20 }

and the people. txt is

s John m 18
t William m 42
s Susan f 18
s Jack m 19
s Jennifer f 28
t Sophia f 35
t Emma f 37
s Chloe f 14
s Racheal f 14
s Olivia f 20
t Cara f 33
t Tom m 47
s Mia f 21
s Isabella f 18
s Zoe f 21
t Lily f 22

use java program

Answer 1

package peoplePackage;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.*;
import java.util.*;
public class peopleClass{
   String fileName="";
  
   public peopleClass(String fileName){//Constructor
       this.fileName=fileName;
   }
   public ArrayList<String> list(){//Student and Teachers
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               list.add(line);
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String stu){// For Students
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               Arrays.toString(splited);
               String str = splited[0];
               if(str.equals("s")){
                   list.add(line);
               }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String tec,String gen){//For Teacher And Female
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               String str = splited[0];
               String str1= splited[2];
               if(str.equals(tec) && str1.equals(gen)){
                       list.add(line);
                   }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String stu,String gen,int age){//For Student Female and AGE
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               String str = splited[0];
               String str1= splited[2];
               int ag = Integer.parseInt(splited[3]);
               if(str.equals(stu) && str1.equals(gen) && ag==age){
                       list.add(line);
                   }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String stu,String gen,int age1,int age2){
       //For Given range of age
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               String str = splited[0];
               String str1= splited[2];
               int ag = Integer.parseInt(splited[3]);
               if(str.equals(stu) && (ag>=age1 && ag<=age2)){
                       list.add(line);
                   }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String stu,int age){// For Students
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               Arrays.toString(splited);
               String str = splited[0];
               int ag = Integer.parseInt(splited[3]);
               if(str.equals(stu) && ag==age){
                   list.add(line);
               }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
   public ArrayList<String> list(String stu,int age,int age1){// For Students Given range age
       ArrayList<String> list = new ArrayList<String>();
       try{
       BufferedReader reader = new BufferedReader(new FileReader(fileName));
       String line = reader.readLine();

           while (line!=null) {
              
               String[] splited = line.split(" ");
               Arrays.toString(splited);
               String str = splited[0];
               int ag = Integer.parseInt(splited[3]);
               if(str.equals(stu) && (ag>=age&&ag<=age1)){
                   list.add(line);
               }
               line = reader.readLine();
           }
           reader.close();
       }
       catch (IOException e){
           System.out.println("Exception :"+e);
       }
       return list;
   }
}
public class people{
   public static void main(String[] args){
        peopleClass p =new peopleClass("people.txt");
       ArrayList<String> result = new ArrayList<String>();
       result=p.list();
       System.out.println(result);
       result=p.list("s");
       System.out.println(result);
       result=p.list("t","f");
       System.out.println(result);
       result=p.list("s","f", 20);
       System.out.println(result);
       result=p.list("s","f", 15, 20);
       System.out.println(result);
       result=p.list("s", 20);
       System.out.println(result);
       result=p.list("s", 15, 20);
       System.out.println(result);
   }
}

Output :

“Assg05_yourName.java”

import peoplePackage.people;

import java.io.*;
import java.util.*;

public class Assg05_yourName{
   public static void main(String []args){
       System.out.println("Assg05_yourName Class");

        public static void main(String[] args){
        peopleClass p =new peopleClass("people.txt");
       ArrayList<String> result = new ArrayList<String>();
       result=p.list();
       System.out.println(result);
       result=p.list("s");
       System.out.println(result);
       result=p.list("t","f");
       System.out.println(result);
       result=p.list("s","f", 20);
       System.out.println(result);
       result=p.list("s","f", 15, 20);
       System.out.println(result);
       result=p.list("s", 20);
       System.out.println(result);
       result=p.list("s", 15, 20);
       System.out.println(result);
   }
}

Output: