Thread: Weird Characters printed

My program is printing random weird characters.

 
/**
 * Write a description of class LandonLoweCipher here.
 * 
 * @author (Landon) 
 * @version (a version number or a date)
 */
import java.io.PrintWriter;
import java.io.File;
import java.util.*;
public class LandonCipher
{
    // instance variables - replace the example below with your own
    private static String phrase;
    private static String newPhrase;
    private static final char[] alpha = {'a','b','c','d','e','f','g','h','i','j','k','l','m',
                        'n','o','p','q','r','s','t','u','v','w','x','y','z'};
    private static char[] newAlpha;
   /**
     * Constructor for objects of class LandonLoweCipher
     */
    public LandonCipher(String p)
    {
        // initialise instance variables
        phrase = p;
        newPhrase = "";
        newAlpha = new char[26];
    }
    public static char[] newAlphabet()
    {
       Random rn = new Random();
       int ran = 0;
       // loop adding random int to array
       for (int i = 0; i < alpha.length; i++)
       {
         ran =  rn.nextInt(26);
         newAlpha[i] += alpha[ran];
         //tests whether the random letter is already in array
         for(int a = 0; a < newAlpha.length; a++)
         {
             if(newAlpha[i] == newAlpha[a])
             {
                 ran =  rn.nextInt(26);
                 newAlpha[i] += alpha[ran];
 
                }
         }
       }
       return newAlpha;
    }
    public static String newPhrase()
    {
        phrase = phrase.toLowerCase();
        for (int i = 0; i < alpha.length; i++)
        {
             for (int a = 0; a < phrase.length(); a++)
                  if(phrase.charAt(a) == alpha[i])
                     newPhrase += newAlpha[i];
        }
        return newPhrase;
    }
}

Here is tester

public class LandonTester
{
    public static void main( String[] args)
    {
        // put your code here
        LandonCipher llc = new LandonCipher("Hey");
        System.out.println(llc.newAlphabet());
    }
}

I made changes suggested though dont have any idea about array part. The weird characters(thanks are gone but letters are beig repeated in alphabet.

/**
 * Write a description of class LandonCipher here.
 * 
 * @author (Landon) 
 * @version (a version number or a date)
 */
import java.io.PrintWriter;
import java.io.File;
import java.util.*;
public class LandonCipher
{
    // instance variables - replace the example below with your own
    private String phrase;
    private String newPhrase;
    private final char[] alpha = {'a','b','c','d','e','f','g','h','i','j','k','l','m',
                        'n','o','p','q','r','s','t','u','v','w','x','y','z'};
    private char[] newAlpha;
   /**
     * Constructor for objects of class LandonLoweCipher
     */
    public LandonCipher(String p)
    {
        // initialise instance variables
        phrase = p;
        newPhrase = "";
        newAlpha = new char[26];
    }
    public char[] newAlphabet()
    {
       Random rn = new Random();
       int ran = 0;
       // loop adding random int to array
       for (int i = 0; i < alpha.length; i++)
       {
         ran =  rn.nextInt(26);
         newAlpha[i] = alpha[ran];
         //tests whether the random letter is already in array
         for(int a = 0; a < newAlpha.length; a++)
         {
             if(newAlpha[i] == newAlpha[a])
             {
                 ran =  rn.nextInt(26);
                 newAlpha[i] = alpha[ran];
 
                }
         }
       }
       return newAlpha;
    }
    public String newPhrase()
    {
        phrase = phrase.toLowerCase();
        for (int i = 0; i < alpha.length; i++)
        {
             for (int a = 0; a < phrase.length(); a++)
                  if(phrase.charAt(a) == alpha[i])
                     newPhrase += newAlpha[i];
        }
        return newPhrase;
    }
}