myrandom.java

模拟的土豆网视频网站

package cn.myvideosite.util;

import java.util.Random;

public class MyRandom {

	private int max;
	private int min;
	private int num;
	
	Random rMax=new Random ();
	Random rMin=new Random ();
	public MyRandom(int min,int max){
		this.max =max;
		this.min=min;
	}
	public int getNum(){
		do{
			 num=rMax.nextInt(max);
		}while(num<min);
	  return num;				
	}
	public static String random(){
		MyRandom random1= new MyRandom(48,57);//将数字，大~小字母分属三个不同区域
		MyRandom random2= new MyRandom(65,90);
		MyRandom random3= new MyRandom(97,122);
		
		Random ranTemp=new Random();//随即选择进去这三个区域
		int temp=0;
		byte[] barr=new byte[15];
		for(int i=0;i<15;i++){
			 temp=ranTemp.nextInt(3);
			switch(temp){
			case 0 : 
				barr[i]=(byte)random1.getNum(); break;
			case 1:
				barr[i]=(byte)random2.getNum(); break;
			case 2:
				barr[i]=(byte)random3.getNum(); break;							    
			}			
		}
		String str=new String(barr);
		return str;
	}
	  public   static   void  main(String[] args) {
		  System.out.println(MyRandom.random());
	  }
}