我正在尝试执行下面的代码。第一个sql查询给了我一些所需的'IMSI'号码，我存储在's'变量中，而不是我用它来select第二和第三个select查询。

当我排除第二个查询时，一切正常。此外，当我用'21901123456456'（它是s变量的值）替换"+s+"时，代码成功完成。  但是当我执行下面的代码时，我得到了来自主题的错误。

import java.sql.*;
import java.util.Scanner;
class stanjeBroja{  
public static void main(String args[]){  
    Scanner reader = new Scanner(System.in);
    System.out.println("Unesi MSISDN");
    // get user input for min range
    String min=reader.nextLine();
    String s = "";
    try{    
        //step1 load the driver class  
        Class.forName("oracle.jdbc.driver.OracleDriver");  
        //step2 create  the connection object  
        Connection con=DriverManager.getConnection(  
        "jdbc:oracle:thin:@ip:port:sid","user","pass");  
        //step3 create the statement object  
        Statement stmt=con.createStatement();  
        //step4 execute query  
        ResultSet rs=stmt.executeQuery("SELECT 
SUBSCRIBERKEY,ALTERNATESUBSCRIBERKEY FROM 
TERTIOTEST.ALTERNATESUBSCRIBERKEY 
WHERE ALTERNATESUBSCRIBERKEY ="+min+"");  
        while(rs.next()){  
            System.out.println("IMSI: "+rs.getString(1)+"  MSISDN: 
"+rs.getString(2)+"  ");  
            s = rs.getString(1);
        }
        ResultSet rs1=stmt.executeQuery("SELECT servicename FROM 
TERTIOTEST.SUBSCRIBERSERVICE WHERE SUBSCRIBERKEY = "+s+"AND servicename 
IN 
('STD','VPNNUM','HLR','VPNUNR','STDHYB','VOXX','VPNFA')");  
        while(rs1.next()){  
            System.out.println("SERVISI: "+rs1.getString(1)+"  ");  
        }
        ResultSet rs2=stmt.executeQuery("SELECT PARAMETERVALUE FROM 
TERTIOTEST.SERVICEPARAMETER WHERE SUBSCRIBERKEY = "+s+"AND servicename = 
'TARIFF' AND PARAMETERNAME = 'tariff'");  
        while(rs2.next()){  
            System.out.println("TARIFA: "+rs2.getString(1)+"  ");  
        }
        //step5 close the connection object  
        con.close();   
    }
    catch(Exception e){
        System.out.println(e);
    }   
    }  
}