makechecknum.java

jsp范例宝典

package com.safe.UserLogon;

public class makechecknum {
	private String checknum;
	public makechecknum(){}
	public void makenum(){
		String sourcenum="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		String siglenum="";
		String checknum="";
		int index=0;
		int i=0;
		while(i<4){
			index=(int)(Math.random()*100)%35;
			siglenum=sourcenum.substring(index,index+1);
			checknum+=siglenum;
			i++;
		}
		this.checknum=checknum;
	}
	public String getChecknum(){
		return this.checknum;
	}
}