write a program to perform operations On file

The given code allow the user to create, view and delete employee data from the file. The file stores employee number, employee name and employee salary.

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

class  EmployeeRecord{
    public static void main(String[] args)  {
        Scanner input=new Scanner(System.in);
        File file = new File("c:/emp.txt");
        boolean exit=false;
        do{
        System.out.println("1 Create");
        System.out.println("2 Delete");
        System.out.println("3 View Employee");
        System.out.println("4 View All Employees");
        System.out.println("5 Exit");

         System.out.print("Enter your choice: ");
        int choice=input.nextInt();
        switch(choice){
            case 1: 
             System.out.print("Enter Employee No: ");
             String no=input.nextLine();
             System.out.print("Enter Employee Name: ");
             String name=input.nextLine();
             System.out.print("Enter Employee Salary: ");
             String sal=input.nextLine();
                try {
                   BufferedWriter output = new BufferedWriter(new FileWriter(file,true));
                   output.write(no + " " + name + " " + sal);
                   output.newLine();
                   output.close();
                   System.out.println("Record is added successfully!");
                }
                catch(Exception e){}
             break;

             case 2:
               System.out.print("Enter Employee No to delete: ");
               String eno=input.next();
                File temp = new File("c:/temp.txt");
                try {
                    BufferedWriter output = new BufferedWriter(new FileWriter(temp));
                    BufferedReader freader = new BufferedReader(new FileReader(file));
                    String s;
                    while ((s = freader.readLine()) != null) {
                        String[] f = s.split(" ");
                        String empno = f[0];
                        String ename = f[1];
                        String esalary = f[2];

                        if (!empno.equals(eno)) {
                            output.write(s);
                            output.newLine();
                        }
                    }
                    System.out.println("Record is deleted successfully!");
                    freader.close();
                    output.close();
                } 
                catch (Exception e) {
                }
                file.delete();
                temp.renameTo(file);
                break;

continue..

case 3:
                        System.out.print("Enter Employee No to view record: ");
                         String empno=input.next();
                          try {
                             BufferedReader freader = new BufferedReader(new FileReader(file));
                             String s;
                             while ((s = freader.readLine()) != null) {
                                String[] st = s.split(" ");
                                String emplno = st[0];
                                String ename = st[1];
                                String esalary = st[2];
                                   if(emplno.equals(empno)){
                                       System.out.println("Employee Name: "+ename);
                                       System.out.println("Employee Salary: "+esalary);
                                   }
                             }
                          }
                          catch(Exception e){
                              System.out.print(e);
                          }
                          break;

                  case 4:
                          try {
                             BufferedReader freader = new BufferedReader(new FileReader(file));
                             String s;
                             while ((s = freader.readLine()) != null) {
                                String[] st = s.split(" ");
                                String emplno = st[0];
                                String ename = st[1];
                                String esalary = st[2];

                                       System.out.println(emplno+"\t"+ename+"\t"+esalary);

                             }
                          }
                          catch(Exception e){
                              System.out.print(e);
                          }
                          break;

                  case 5:
                      exit=true;
                          System.exit(0);
                          break;

                   }
            }
            while(!exit);
        }
    }

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