//Reid wrote this so don't steal it
import javax.swing.JOptionPane;

public class EncTest {

    public static void main(String[] args) {
    	int[] a = {251,214,120,1,40,190,254,27};
    	int[] b = {212,232,54,135,244,15,179,80};
    	String test = JOptionPane.showInputDialog("Input a string.");
    	String key = JOptionPane.showInputDialog("Input a key.");
    	int key1 = checksum(key);
    	int key2 = checksum(b);
    	enctest(test,key1);
    }
    public static int checksum(String key){
    	int z = 0;
    	int y = 0;
    	byte[] theKey = key.getBytes();
    	for(int x = 0;x < key.length(); x++){
    		z += theKey[x];
    	}
    	y = z/256;
    	y = y*256;
    	return z-y;
    }
    public static int checksum(int[] bytes){
    	int z = 0;
    	int y = 0;
    	for(int x = 0;x < bytes.length; x++){
    		z += bytes[x];
    	}
    	y = z/256;
    	y = y*256;
    	return z-y;
    }
    public static void enctest(String enc, int key){
    	byte[] string = enc.getBytes();
    	for(int x = 0;x<enc.length();x++){
    		string[x] = new Integer(((int)string[x]*key)%256).byteValue();
    	}
    	String final1 = new String(string);
    	JOptionPane.showMessageDialog(null,final1);
    }
}

    	//more of Reid's code. not complete, duh.
    	int keymod = key%256;
    	for(int i = 0;i<256;i++){
    		while(encrypted%keymod!=0){
    			encrypted += 256;
    		}
    		decrypted=encrypted/keymod;
    		System.out.println(i+" "+decrypted);
    	}

/**
 * @(#)enc.java
 *
 *
 * @author 
 * @version 1.00 2008/1/28
 */

public class enc {

    public static void main(String[] args) {
    	int[] encrypted = new int[256];
    	int[] decrypted = new int[256];
    	int key = 643;
    	for(int i = 0;i<256;i++){
    		encrypted=i*key%256;
    		System.out.println(i+" "+encrypted);
    	}
    	int keymod = key%256;
    	for(int i = 0;i<256;i++){
    		while(encrypted%keymod!=0){
    			encrypted += 256;
    		}
    		decrypted=encrypted/keymod;
    		System.out.println(i+" "+decrypted);
    	}
    }
    
}