how to try catch this?

[safra]

dear all, i want to try catch this. i want a message to appear before it asks for the password..pleas e help me out..

import java.util.Scanner;

import javax.swing.*;

import java.io.*;

public class BackItUpTxt
{
    public static void main(String agrs[]) throws IOException

    {
        String D_Play = "File does not exist!";
        try
        {
        Scanner yeet1=new Scanner(System.in);

        System.out.println("Enter file that you want to backup:");

        String yeet2=yeet1.nextLine();
      
   
        
        System.out.println("Enter password to secure your backup:");

        String yeet3=yeet1.nextLine();
        
      
            for (int count =6; count > 0 && yeet3 != "acbt"; count--)
            {
            System.out.println("Wrong password. " + (count-1) + " attempts left.Enter password again:");
           
            yeet3=yeet1.nextLine();
        }

       
        Encrip.encrip(yeet3,yeet2);

        Backup.backup(yeet2);
   }
 catch(FileNotFoundException e){
        JOptionPane.showMessageDialog (null,D_Play);
    
        System.exit(-1);
    }

}
}

[Dheeraj Joshi]

Scanner yeet1=new Scanner(System.in);
System.out.println("Enter file that you want to backup:");
String yeet2=yeet1.nextLine();

Wrap this code in try catch.
Take

String yeet2 = null;

If nothing return or if you catch exception do not proceed to except the password.

Regards
Dheeraj Joshi

[safra]

i dont exactly understand what you meant.but i did try it out the way i understood.it still dint do what i expected it 2 do.

import java.util.Scanner;

import javax.swing.*;

import java.io.*;

public class BackItUpTxt
{
    public static void main(String agrs[]) throws IOException

    {
        String D_Play = "File does not exist!";
        try
        {
        Scanner yeet1=new Scanner(System.in);

        System.out.println("Enter file that you want to backup:");
        String yeet2 = null;
        yeet2=yeet1.nextLine();
  }
 catch(FileNotFoundException e){
        JOptionPane.showMessageDialog (null,D_Play);
        
        System.out.println("Enter password to secure your backup:");

        String yeet3=yeet1.nextLine();

when i do this.it says you cant find the variable yeet1..how do i try catch this?im not so good in java.and my assignment is due in 3 days.please help me out soon as possible.thanx alot

[Dheeraj Joshi]

Try something like this

Scanner yeet1=new Scanner(System.in);
String yeet2 = null;
String yeet3 = null;
try{
    System.out.println("Enter file that you want to backup:");
	yeet2=yeet1.nextLine();
	if(null == yeet2){
		System.out.println("File name missing");
		System.Exit(0);
	}
	System.out.println("Enter password to secure your backup:");
	yeet3=yeet1.nextLine();
	if(null == yeet3){
		System.out.println("Password missing");
		System.Exit(0);
	}
	
	// Rest of the code
}
catch(FileNotFoundException e){
	//Check type of exception
	//Hadle it accordingly
}

Regards
Dheeraj Joshi