Thread: [Beginner]Database project help

So I am working on making a code for my Aunt who is a doctor, This is what the code does
1.Asks Name
2.Asks Gender(press 1 for male, 2 for female)
3.Occupation(1-student,2-job,3-Others)
if we select 3 we are made to write the other occupation
4.Ask age
5.Shows the Name,Gender,Occupation and age in a formal manner
proceeds to ask if we wanna add another patient
So What I want this code to be able to do is but have no idea how are:-
1. I want step 5 to be written on a text file in my computer and continue to add as we keep on adding more patients.
2. I want to be able to search through the patient based on the age,name,etc. You get the drill.
You don't need to write the full code if you don't want to but it will be really Helpful if anyone can teach me how to write informations in a text with example and how i can read those text files later and search them based on age and name
Here is the code
Ignore the Search by name,age etc part of the program I Havnt worked on them yet as I dont know how to write the informations I get to a text file in my computer and then read then in java and search thorough the database
SUBCLASS

import java.util.InputMismatchException;
import java.util.Scanner;
public class methods {
	int serial=1;
	String nameFinal;
	String occupationFianl;
	String genderFinal;
	String drugFinal;
	String freqFinal;
	String routeFinal;
	int ageFinal;
	long numFinal;
 
	String durationFinal;
	//name
	public void InputName() {
		Scanner input = new Scanner(System.in);
		System.out.println("enter the name of the patient.");
		String name= input.nextLine();
		nameFinal=name;
	}
	//age
	public void InputAge() {
		Scanner input = new Scanner(System.in);
		System.out.println("Enter the age of the patient.");
		int age=input.nextInt();
		ageFinal=age;
	}
	//gender
	public void Inputgender() {
		boolean rep=true;
		Scanner input = new Scanner(System.in);
		System.out.println("Enter the Gender of the patient...1-male, 2-female.");
		do {
			try {
				int gender= input.nextInt();
			if (gender==1) {
				genderFinal="Male";
				rep=false;
 
			}
			else if(gender==2) {
				genderFinal="Female";
				rep=false;
			}
			else throw new InputMismatchException("wrong input");
			}
			catch (Exception e)
			{
				input.reset();
					rep=true;
			}
		}while(rep==true);
	}
	//occupation
		public void InputOcc() {
 
			boolean rep=true;
			Scanner input = new Scanner(System.in);
			System.out.println("Enter the occupation of student.");
			System.out.println("1-fulltime Student, 2-Dropout School, 3-employed, 4-Unemployed.");
			do {
			try {
				int Occ= input.nextInt();
			if (Occ==1) {
				occupationFianl="Fulltime Student";
				rep=false;
 
			}
			else if(Occ==2) {
				occupationFianl="Dropout School";
				rep=false;
			}
			else if(Occ==3) {
				occupationFianl="Employed";
				rep=false;
			}
			else if(Occ==4) {
				occupationFianl="Unemployed";
				rep=false;
			}
			else throw new InputMismatchException("wrong input");
			}
			catch (Exception e)
			{
				input.reset();
					rep=true;
			}
		}while(rep==true);
 
 
		}
	//drugasbused
		public void InputDrugUsed() {
			Scanner input = new Scanner(System.in);
			System.out.println("Enter the Drugs used");
		input.reset();
			String drug= input.nextLine();
 
			drugFinal=drug;
 
		}
	//durationofdrug
		public void InputDrugDuration() {
			Scanner input = new Scanner(System.in);
			boolean rep=true;
			System.out.println("enter the duration(1-1 year & more, 2- 6months or less.)");
 
 
			do {
				try {
					int duration= input.nextInt();
				if (duration==1) {
					durationFinal="1 year& more.";
					rep=false;
 
				}
				else if(duration==2) {
					durationFinal="6 months or less.";
					rep=false;
				}
 
				else throw new InputMismatchException("wrong input");
				}
				catch (Exception e)
				{
					input.reset();
						rep=true;
				}
			}while(rep==true);
		}
	//frequency
		public void InputFrequency() {
			boolean rep = true;
			Scanner input = new Scanner(System.in);
		System.out.println("Enter the frequency of drug used");
		System.out.println("1-daily, 2-twice a week, 3-once a week");
		do {
			try {
				int freq= input.nextInt();
			if (freq==1) {
				freqFinal="Daily.";
				rep=false;
 
			}
			else if(freq==2) {
				freqFinal="twice a week.";
				rep=false;
			}
			else if(freq==3) {
				freqFinal="Once a week.";
				rep=false;
			}
			else throw new InputMismatchException("wrong input");
			}
			catch (Exception e)
			{
				input.reset();
					rep=true;
			}
		}while(rep==true);
		}
	//route
		public void Inputroute() {
			boolean rep=true;
			Scanner input = new Scanner(System.in);
			System.out.println("means of route.");
			System.out.println("1-injection, 2-snorting");
			do {
				try {
					int route= input.nextInt();
				if (route==1) {
					routeFinal="Injection";
					rep=false;
 
				}
				else if(route==2) {
					routeFinal="Snorting";
					rep=false;
				}
				else throw new InputMismatchException("wrong input");
				}
				catch (Exception e)
				{
					System.out.println("wrong input, Try again");
					input.reset();
						rep=true;
				}
			}while(rep==true);
		}
		//number
		public void InputNum() {
			Scanner input = new Scanner(System.in);
			System.out.println("enter contacnt nnumber.");
			long num=input.nextLong();
			numFinal=num;
		}
	//getage
		public int getAge() {
			return ageFinal;
		}
	//getname
		public String getName() {
			return nameFinal;
		}
	//showlist
		public void showlist() {
 
		System.out.println("Name(Abuser): "+nameFinal);
		System.out.println("Age : "+ageFinal);
		System.out.println("Sex : "+genderFinal);
		System.out.println("Occupation(Victim) : "+occupationFianl);
		System.out.println("Drug Abused : "+drugFinal);
		System.out.println("Frequency of Dosage  : "+freqFinal);
		System.out.println("Route  : "+routeFinal);
System.out.println("Phone number: "+numFinal);
 
 
		}
	//search by namePat
		//searchby occupationPat
		//searchbyage
public void Collect() {
	InputName();
	InputAge();
Inputgender();
	InputOcc();
	InputDrugUsed();
	InputDrugDuration();
	InputFrequency();
Inputroute();
	InputNum();
showlist();
System.out.println("");
System.out.println("");
}
 
}

MAIN CLASS

import java.util.*;
public class mainbody {
 
	public static void main(String[] args) {
	ArrayList<methods> arraysOfObj=new ArrayList<methods>();
	Scanner input = new Scanner(System.in);
	String answer;
	int objNO=0;
	boolean repeat=true;
	do {
		arraysOfObj.add(new methods());
		arraysOfObj.get(objNO).Collect();
			objNO++;
			System.out.println("wanna add more?");
			answer=input.nextLine();
			if(answer.equalsIgnoreCase("yes")) {
				repeat=true;
			}
			else repeat=false;
	}while(repeat==true);
 
	//searches
	int arrays[]=new int[arraysOfObj.size()];
	do {
		System.out.println("press 1 to search Database by name");
		System.out.println("press 2 to seach by age");
		System.out.println("press 3 to search by occupation status");
		System.out.println("press 4 to search by Duration");
		System.out.println("press 5 to search by frequency");
		System.out.println("press 6 to show all list");
		int choice=input.nextInt();
		//search by name
		if(choice==1) {
			String nameS=input.nextLine();
			for(int i=0;i<arrays.length;i++) {
				if(arraysOfObj.get(i).nameFinal.equalsIgnoreCase(nameS)) {
					arraysOfObj.get(i).showlist();
				}
			}
		}
		if(choice==2) {
			int ageS=input.nextInt();
			for(int i=0;i<arrays.length;i++) {
				if(arraysOfObj.get(i).getAge()==ageS) {
					arraysOfObj.get(i).showlist();
				}
			}
		}
		if(choice==3) {
			String OccS=input.nextLine();
			for(int i=0;i<arrays.length;i++) {
				if(arraysOfObj.get(i).occupationFianl.equalsIgnoreCase(OccS)) {
					arraysOfObj.get(i).showlist();
				}
			}
		}
		if(choice==4) {
			String Duration=input.nextLine();
			for(int i=0;i<arrays.length;i++) {
				if(arraysOfObj.get(i).durationFinal.contains(Duration)) {
					arraysOfObj.get(i).showlist();
 
	}
 
}
}
		if(choice==5) {
			String freq=input.nextLine();
			for(int i=0;i<arrays.length;i++) {
				if(arraysOfObj.get(i).freqFinal.contains(freq)) {
					arraysOfObj.get(i).showlist();
	}
			}
		}
		if(choice==6) {
			for(int i=0;i<arrays.length;i++) {
		arraysOfObj.get(i).showlist();
				}
			}
	} while(1!=0);
	}
}

Originally Posted by Norm

You can use a PrintWriter class object to write text to a file. The print and println methods will write Strings to the file.

Before writing any code, you need to design the layout of the file so that the data can be read back and updated later.

Write a small test program that writes and reads a file with hard coded values to see how to use the classes and methods BEFORE trying to put code into your existing program. After you have worked out the techniques, then look at merging the code into your program.

Thank you that helps a lot while leaving space for me to experiment myself
Can you tell me about how to read too? n search through it?