抽奖程序
'package choujiang;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
public class choujiang {
public static void main(String[] args) {
ArrayList <Integer> number = new ArrayList<>();
Random random = new Random();
for(int i=0;i<1000;i++){
int A=i;
number.add(A);
}
Collections.shuffle(number);
int A = random.nextInt(1000);
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(1000-i);
System.out.println("二等奖" +number.get(B)+"
");
number.remove(B);
}
for(int i=1;i<4;i++){
Collections.shuffle(number);
int C = random.nextInt(997-i);
System.out.println("三等奖" +number.get(C)+"
");
}
}
}
'
截图