随机生成6位不重复的验证码

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本文链接： https://blog.csdn.net/qq_43498110/article/details/99329966

1.生成6位不重复的验证码

package Day06;
//随机生成六位数字的验证码
public class AuthCode {

	public static void main(String[] args) {
		char[]Code= {'3','4','5','6','7','8','9',
				'A','B','C','D','F','G','H','G',
				'K','L','M','N','P','Q','R','S','T','U','V','W','X','Y'};
		boolean []flags=new boolean[Code.length];
		int index;
		char []number=new char[6];
		for (int i = 0; i < number.length; i++) {
			do {
				index=(int)(Math.random()*Code.length);
			}while(flags[index]==true);
			number[i]=Code[index];
			flags[index]=true;
		}
		System.out.print("产生的验证码：");
		System.out.print(number);
				
		
	}

}

2.彩票号码随机生成器

package Day06;
//彩票随机生成器
public class Double_Ball {

	public static void main(String[] args) {
		int[]RedBall=red();
		System.out.println("*********本期开奖********");
		System.out.println("红球号码：");
		for (int i = 0; i < RedBall.length; i++) {
			System.out.print("{"+RedBall[i]+"}"+"\t");
		}
		//生成蓝球的号码
		System.out.println();
		System.out.println("蓝球号码：");
        int []number= {01,02,03,04,05,06,07};
        int Blue=number[(int)(Math.random()*number.length)];
        System.out.println("{"+Blue+"}");
	}
	//生成红色球号码的方法
	public static int[] red(){
		int []number= {01,02,03,04,05,06,07,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32};
		int []RedBall=new int[6];
		boolean flags[]=new boolean[number.length];
		int index;
		for (int i = 0; i < RedBall.length; i++) {
			do {
				index=(int)(Math.random()*number.length);
				
			}while(flags[index]==true);
			RedBall[i]=number[index];
			flags[index]=true;
			
		}
		return RedBall;
		
	}

}