public static String getRandom(int i) {
        Random jjj = new Random();
        // int suiJiShu = jjj.nextInt(9);
        if (i == 0)
            return "";
        String jj = "";
        for (int k = 0; k < i; k++) {
            jj = jj + jjj.nextInt(9);
        }
        return jj;
    }
public static String getRandom(int i) {
        Random jjj = new Random();
        
        if (i == 0)
            return "";
        String jj = "";
        for (int k = 0; k < i; k++) {
            jj = jj + jjj.nextInt(9);
        }
        return jj;
    }
public static String getRandom ( int i ) { Random jjj = new Random ( ) ; // int suiJiShu = jjj.nextInt(9); if ( i == 0 ) return "" ; String jj = "" ; for ( int k = 0 ; k < i ; k ++ ) { jj = jj + jjj . nextInt ( 9 ) ; } return jj ; }
返回一个随机数

@param i
@return
返回一个随机数