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Lotto.java

package TestMsg;

import java.util.Random;

class Lotto{
    public static void main(String args[]){
        Random r=new Random();
        int[] loNum=new int[6];       
        int nextCount=0;           
        int num=0;            
        for(;nextCount<6;){       
            num=r.nextInt(45)+1;     
            if(nextCount==0){     
                loNum[nextCount]=num;
                System.out.print(loNum[nextCount]+"  ");
                nextCount++;   
            }
            else{      
                loNum[nextCount]=num;      
                int equalsNum=0;         
                a:for(int j=0;j<nextCount;j++){      
                    if(loNum[nextCount]==loNum[j]){    
                        equalsNum++;        
                        break a;     
                    }
                }
                if(equalsNum==0){    
                    System.out.print(loNum[nextCount]+"  ");      
                    nextCount++;      
                }
            }
        }
        System.out.println();         
    }
}

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import java.util.Random;

public class Lotto {

  public static void main(String[] args) {
    Random rand = new Random();
    boolean[] numbers = new boolean[45];

    // initialize numbers
    for (int i = 0; i < numbers.length; i++) {
      numbers[i] = false;
    }

    // choose numbers
    int count = 0;
    while (count < 6) {
      int n = rand.nextInt() % 45;
      n = n > 0 ? n : -n;
      if (numbers[n] == false) { // check the numbers are choosen
        numbers[n] = true;
        count++;
      }
    }

    // print out the numbers
    for (int i = 0; i < numbers.length; i++) {
      if (numbers[i] == true) {
        System.out.print(" " + (i+1));
      }
    }
    System.out.println();
  }
}

for i in 1..5 do
        lotto = (1..45).sort_by{rand}[0,6].sort
        printf "%3d %3d %3d %3d %3d %3d\n", lotto[0], lotto[1], lotto[2], lotto[3], lotto[4], lotto[5]
end

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package test;

import java.util.Random;
import java.util.SortedSet;
import java.util.TreeSet;
public class LottoMachine1 {
    public static void main(String[] args) {
        SortedSet<Integer> pickedNumbers = new TreeSet<Integer>();
        Random random = new Random();
        while(pickedNumbers.size()< 6) pickedNumbers.add(random.nextInt(45)+1);
        System.out.println(pickedNumbers);
    }
}


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