package lotterydraw;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
public class lotterDraw {
public static void main(String[] args) {
ArrayList <Integer> number = new ArrayList<>();
Random random = new Random();
for(int i=0;i<2000;i++){
int A=i;
number.add(A);
}
Collections.shuffle(number);
int A = random.nextInt(2000);
System.out.println("一等奖:"+number.get(A)+"
");
number.remove(A);
for(int i=1;i<3;i++){
Collections.shuffle(number);
int B = random.nextInt(2000-i);
System.out.println("二等奖;"+number.get(B)+"
");
number.remove(B);
}
for(int i=1;i<4;i++){
Collections.shuffle(number);
int B = random.nextInt(1997-i);
System.out.println("三等奖;"+number.get(B)+"
");
}
}
}