java随机生成6位数

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public static void main(String[] args) {
Date time=new Date();
String date=time.toLocaleString();
System.out.println(date);
date=date.substring(0,date.indexOf(" "));
System.out.println(date); 
//验证码
//随机生成6位 Math.random()生成0-1之间的double类型的数字,Math.random()*9生成0-8之间
System.out.println((int)((Math.random()*9+1)*100000)+"=1");//1
Random r = new Random();
//eg:0.9708724409898095生成0-1之间的随机数 
double str= r.nextDouble();
System.out.println(str*9);
System.out.println((int)((str*9+1)*100000)+"=2");//2

//int x = r.nextInt(999999);
//System.out.println(x);//35528,有可能生成5位,需判断
int x = 0;
while(true){
x = r.nextInt(999999);
if(x > 99999){
break;
}
else continue;
}
System.out.println(x+"=3");//3

System.out.println("随机数为:" + getRandNum(1,999999));//4
}

public static int getRandNum(int min, int max) {
   int randNum = min + (int)(Math.random() * ((max - min) + 1));
   return randNum;
}