Untitled

package com.company;

import java.io.FileWriter;
import java.io.IOException;

public class Array {

    String[][] data;
    int row;

    public Array(int num) {
        data = new String[num][5];
        row = 0;
    }

    public void insert(String StudentId, String firstname, String lastname, String email, String phone) {
        if (data.length != row) {
            data[row][0] = StudentId;
            data[row][1] = firstname;
            data[row][2] = lastname;
            data[row][3] = email;
            data[row][4] = phone;
            row++;
            sort();
        } else {
            System.out.println("Limit is full");
        }
    }

    public void Filing() {
        try {
            FileWriter myWriter = new FileWriter("data.txt");
            for (int i = 0; i < row; i++) {
                myWriter.write(data[i][0] + " "+data[i][1]+" "+data[i][2]+" "+data[i][3]+" "+data[i][4]+"\n");
            }
            myWriter.close();
            System.out.println("Filing Successfully");
        } catch (IOException e) {
            System.out.println("Error while filing");
            e.printStackTrace();
        }
    }

    public void sort() {
        for (int i = 0; i < row - 1; i++) {
            int count = i;
            for (int j = i + 1; j < row; j++) {
                if (data[j][0].compareTo(data[count][0]) > 0) {
                    count = j;
                }
            }
            String[] temp = data[i];
            data[i] = data[count];
            data[count] = temp;
        }
    }

    public void search(String firstname, String lastname) {
        boolean found = false;
        for (int i = 0; i < row; i++) {
            if (data[i][1].equals(firstname) && data[i][2].equals(lastname)) {
                System.out.println("Student found: "+data[i][0]+" "+data[i][1]+" "+data[i][2]);
                found = true;
                break;
            }
        }
        if (!found) {
            System.out.println("Not found "+firstname+" "+lastname);
        }
    }

    public void print() {
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < 5; j++) {
                System.out.print(data[i][j]+" ");
            }
            System.out.println();
        }
    }
}

******************************************** Main Class *************************************

package com.company;

public class Main {

    public static void main(String[] args) {
        Array student = new Array(5);
        student.insert("2312", "Zain", "Hassan", "m.zain@gmail.com", "0987654");
        student.insert("23122", "Saadain", "Ali", "saadain@gmail.com", "0987654");
        student.insert("2315", "Mustafa", "Mustaza", "mustafa@gmail.com", "0987654");
        student.insert("23122", "Talib", "Ali", "m.taha@gmail.com", "0987654");

        student.print();
        student.Filing();


        student.search("Zain", "Hassan");
        student.search("John", "Doe");
    }
}