java生成6位随机数

方法1

public int nextInt(final int min, final int max)

{

      Random rand= new Random();

      int tmp = Math.abs(rand.nextInt());

      return tmp % (max - min + 1) + min;

} 

 

方法2：不会生成小于100000的数

Random random = new Random();  
int x = random.nextInt(899999);  
int x = x+100000; 

 

方法3

int n = 0 ;
while(n < 100000){
         n = (int)(Math.random()*1000000);
}
System.out.println(n);

 

方法4

 public static void f(){
         String str = "";
         str += (int)(Math.random()*9+1);
         for(int i = 0; i < 5; i++){
               str += (int)(Math.random()*10);
         }
        
         int num = Integer.parseInt(str);
         System.out.println(num);
}

 

方法5

System.out.println((int)((Math.random()*9+1)*100000));

 

方法6

Random random = new Random(); 
String result="";
for(int i=0;i<6;i++){
       result+=random.nextInt(10);    
}

System.out.print(result);