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Thread: String Import

  1. #1
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    Default String Import

    As the forum states "inheritance", I thought this might fit here. Anyways I've looked around quite a bit on importing Strings from another class and what ever I find hasn't seemed to work.

    I want to be able to grab the username/password data from the text file, save it to a String, and import it to the login class for user input verification. Now I know it's not safe to make a login this way, but it's simply a theory test.

    In "Login" the situation is where case String(a,c): /case String(b,d): are. I would like to be able to call these strings from class playerbase.

    If I'm doing this in a completely ridiculous way, please notify me and give me suggestions on how to improve.


    Main

    package test.theory;
     
     
    public class Main{
    	public static void main(String[] args){
     
    		Login loginObject = new Login();
    		loginObject.login(args);
     
     
    	}
    }

    Login

    package test.theory;
    import test.theory.playerbase.*;
    import javax.swing.JOptionPane;
     
     
    public class Login{
     
    	public void login(String[] args){
     
     
     
    		System.out.println("Heroes of Iskast V0.0.1");
    		String a = JOptionPane.showInputDialog("Enter your username","Username");
    		switch (a){
    		case String(a,c): System.out.println("Username accepted.");  //This line, the 'a' and 'c' aren't being referenced from playerbase.java, same with line 17
    		String b = JOptionPane.showInputDialog("Enter your password","Password");
    		switch (b){
    		case String(b,d): JOptionPane.showMessageDialog(null,"You have successfully logged in, congradulations.", "Login",JOptionPane.PLAIN_MESSAGE);
    		return;
     
    		default: JOptionPane.showMessageDialog(null,"You entered the wrong password, please try again.", "Login",JOptionPane.PLAIN_MESSAGE);
    		Main.main(args);
    		}
    		default: JOptionPane.showMessageDialog(null,"You entered the wrong username, please try again.", "Login",JOptionPane.PLAIN_MESSAGE);
    		Main.main(args);
    		}
     
    		/* add an entry-per-second limiter */
     
    	}
     
    }

    playerbase

    package test.theory;
    import java.io.*;
    import java.util.*;
     
     
    public class playerbase {
    	public Scanner x;
     
    	public void openFile(){
     
    		try{
    			x = new Scanner(new File("playerbase.txt"));
    		}
    		catch(Exception e){
    			System.out.println("error found...somewhere");
    		}
     
    	}
    	public void readFile(){
     
    		while(x.hasNext()){
    			String a = x.next();
    			String b = x.next();
    			String c = x.next();
    			String d = x.next();
     
    			System.out.printf("%s%s%s%s\n", a,b,c,d); // Not quite to sure what this is going to do yet? Haven't been able to execute the code because of the String problem.
    		}
    	}
    	public void closeFile(){
    		x.close();
    	}
    }


    playerbase.txt:

    OceansRythme accept Danaku1416 danaku


  2. #2
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    Default Re: String Import

    Your idea of using a Login object is interesting. I didn't look at the code you posted, so forgive me if my assumptions are off, but your Login class could contain userName and password fields (probably String objects) collected from the user attempting a logon that could then be passed to a validator that compares the contents of the Login object to the values stored in the file of logon names and passwords.

    Pretty simple, really. I'm not sure what you mean by "import," but I think you're making it too hard.

  3. The Following User Says Thank You to GregBrannon For This Useful Post:

    OceansRythme (September 16th, 2013)

  4. #3
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    Default Re: String Import

    Quote Originally Posted by GregBrannon View Post
    Your idea of using a Login object is interesting. I didn't look at the code you posted, so forgive me if my assumptions are off, but your Login class could contain userName and password fields (probably String objects) collected from the user attempting a logon that could then be passed to a validator that compares the contents of the Login object to the values stored in the file of logon names and passwords.

    Pretty simple, really. I'm not sure what you mean by "import," but I think you're making it too hard.
    Sounds brilliant, unfortunately I'm not too sure on how to go about making a validator, but I'm sure there's a tutorial out there somewhere, thanks for your input

  5. #4
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    Default Re: String Import

    I imagine a validator would be a custom equals() method that compares the two login objects, one login object created during the user's login attempt, and the other login object created from the data stored in the file.

  6. #5
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    Default Re: String Import

    Quote Originally Posted by GregBrannon View Post
    I imagine a validator would be a custom equals() method that compares the two login objects, one login object created during the user's login attempt, and the other login object created from the data stored in the file.
    Ah yes, that worked, tyvm.

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