Thread: Math.random() with no duplictaes

Help me solve this please. been trying for about 2 hours now. and this is the last piece of code i need for my main program. help would be appreciated. thanks.

import javax.swing.*;
public class random 
{
 
    public static void main(String[]args) 
    {
    	int resultNum [] = {50,50,50,50,50,50};
 
    	for(int x = 0;x<6; x++)
    	{
    		resultNum[x] = 0 + (int)(Math.random() * ((29 - 0) + 1));
 
    		for(int y=5;y>6;y++)
    		{	
    			if(resultNum[x] == resultNum[y])
    			{
    				resultNum[x] = 0 + (int)(Math.random() * ((29 - 0) + 1));
    				break;
    			}
 
    			else
    			{
    				resultNum[x] = resultNum[x];
    				break;
    			}	
    		}
    	}
 
    	JOptionPane.showMessageDialog(null, resultNum[0] + " " + resultNum[1] + " " + resultNum[2] + " " + resultNum[3] + " " + resultNum[4]
    	+ " " + resultNum[5] );
    } 
}

the program should first generate a random number and then checks the generated number if the generated number is already in the array. and if the generated number is already in the array it will generate another random number.

that statement is a dummy, because i was to frustrated already and cant think straight.

here is the output. as you can see. it has 3 number 26s.

Capture.PNG