用Random函数产生一定长度的字符串

Question

怎么没人回我呢？郁闷……ing

Answer 1

写了一个，没有考虑大写字母，要是用大写字母你自己改吧import java.util.Random;public class RandomString
{    public static void main(String[] args)
    {   
        RandomString r=new RandomString();
        String r1=r.RandomString(10);
        System.out.println(r1);
        
    }
    
    public String RandomString(int length)
    {
        
        char[] c=new char[length];
        for(int i=0;i<length;i++)
        {
            int m=(int)(48+75*Math.random());
            if(m>57 & m<97)
            {
                i--;
                continue;
            }
            c[i]=(char)m;
        }
        
        String rs=String.valueOf(c);    
        return rs;
        
    }
}