Ass

package input1;

import java.io.BufferedWriter;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;

public class input1{

    public static void main(String[] args){
        int id1 = 0, count = 0;
        String[] user_name = null;
        String[] pass_word = null;
        double[] amount = null;
        Scanner scanner = new Scanner(System.in);
        try{
        File id = new File("C:/id.txt");
        File username = new File("C:/username.txt");
        File password = new File("C:/password.txt");
        File curr_amount = new File("C:/curr_amount.txt");
        if(!id.exists()){
            id.createNewFile();
            FileWriter fw = new FileWriter(id.getAbsoluteFile());
            BufferedWriter bw = new BufferedWriter(fw);
            id1 = 1;
            bw.write(id1);
            bw.close();
        }

        //loop masukkan text to array

        System.out.println("1. Log in. ");
        System.out.println("2. Sign up. ");
        count = scanner.nextInt();
        if(count==1){

        }
        else if (count == 2){
        Scanner count_id = new Scanner(id);
        id1 = count_id.nextInt();
        count_id.close();
        id1 = id1 +1;
        System.out.print("Enter name: ");
        user_name[id1] = scanner.next();
        System.out.print("Enter password: ");
        pass_word[id1] = scanner.next();
        System.out.print("Enter amount: ");
        amount[id1] = scanner.nextDouble();
        if(amount[id1]<10){
        System.out.println("Your new account must at least have RM 10.00.");
        }
        Scanner count_username = new Scanner(username);
        while(count_username.hasNext()){
        count_username.next();
        }

        }
        else{
            System.out.println("Invalid input. Please enter 1 or 2.");
        }
        FileWriter fw = new FileWriter(id.getAbsoluteFile());
        BufferedWriter bw = new BufferedWriter(fw);
        System.out.print("Enter name: ");
        String content = scanner.next();
        bw.write(content);
        bw.close();
        FileReader filea = new FileReader("C:/filename.txt");
        BufferedReader reader = new BufferedReader(filea);
        String text = "";
        String line = reader.readLine();
        while (line != null){
            text += line;
            line = reader.readLine();
        }
        reader.close();
        System.out.println(text);




    }catch(IOException e){
    e.printStackTrace();
    }
}
}