Question

Java lottery

Vrite a java program which gives 3 rows of lottery at random and writes out the result using JOptionPane.showMessageDialog0; in the following format. ow 1: [23,7, 10,31,27,11,3) ow 2: [ 12,3, 25,9, 35, 6, 20] ow: 3: [31,27, 19, 1, 12,32, 19 Moreover row 1, row 2 and row 3 can have different values and two values can not be the same in the same row

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
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// Lottery.java

import java.util.Random;

import javax.swing.JOptionPane;

public class Lottery {

   public static void main(String[] args) {
   int lotteryTic[][]=new int[3][7];

       geneateLotteryNos(lotteryTic);  
   displayLotteryTicket(lotteryTic);

   }

   private static void displayLotteryTicket(int[][] lotteryTic) {
       String str="";
for(int i=0;i<lotteryTic.length;i++)
{
   str+="Row "+(i+1)+": [";
   for(int j=0;j<lotteryTic[0].length;j++)
   {
str+=lotteryTic[i][j];
if(j!=lotteryTic[0].length-1)
{
   str+=",";
}

  
   }
   str+="]\n";
}

// Displaying the output
JOptionPane.showMessageDialog(null,str);
   }

   private static void geneateLotteryNos(int lotteryTic[][]) {
       //Creating a random Class object
       Random r = new Random();
       int num;
       for(int i=0;i<lotteryTic.length;i++)
       {
           for(int j=0;j<lotteryTic[0].length;)
           {
               num=r.nextInt((50 - 1) + 1) + 1;
               boolean b=checkDuplicate(lotteryTic,num,i);
               if(b)
               {
                   lotteryTic[i][j]=num;
                   j++;
               }
           }
       }
      
   }

   private static boolean checkDuplicate(int[][] lt,int num,int row) {
       for(int i=0;i<lt[0].length;i++)
       {
           if(lt[row][i]==num)
               return false;
       }
       return true;
   }

}
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Output:

Message Row 1: [25,4,27,22,41,14,46] Row 2: [50,11,12,30,41,29,5] Row 3: [8,46,22,18,30,11,20] OK

_________________________________Thank You