随机生成双色球彩票红，蓝数字

public class DoubleBallDemo2 {

public static void main(String[] args) {
String [] redPool = new String[33]; //红球池
String [] bluePool = new String[16];//蓝球池
redPool 				=	getFullString(redPool);
bluePool 				=	getFullString(bluePool);

System.out.println(Arrays.toString(doubleBall(redPool,bluePool)));
//		System.out.println(Arrays.toString(bluePool));

}

public static String[] getFullString( String [] ary)
{
for ( int i = 0; i < ary.length; i++ )
{
char [] ch	 		= {'0','0'};
String s 			= Integer.toString(i+1); //字符串转字符
char [] num 		=	s.toCharArray(); //字符串转成数组 "1" -> {'1'}
System.arraycopy(num, 0, ch, ch.length-num.length, num.length);
String ball 		= new String(ch);
ary[i] 			=	ball;
}
return ary;
}

public static String [] doubleBall( String [] redPool, String [] bluePool )
{
boolean [] used = new boolean[redPool.length]; //使用的球存放在这里，标记TRUE,默认FALSE
String [] all 		 =	 new String[7]; //存放红，蓝球
Random 	r	 = new Random();
for ( int i = 0; i < 6; i++ )
{
int  rdnum;
do{

rdnum 	 = r.nextInt(redPool.length);

}while ( used[rdnum] );
all[i]		 	 = redPool[rdnum];
used[rdnum] = true;
}
all[all.length-1]  = "99";
Arrays.sort(all);
all[all.length-1] = bluePool[r.nextInt(bluePool.length)];
return all;
}
}