我正在尝试从Java程序执行sql命令。.我对此代码没有任何错误..但是我正面临来自数据库的连接拒绝。

import java.sql.*;
public class DBCreateTable
{
    public static void main(String args[]) throws Exception
    {
        DriverManager.registerDriver (new Oracle.jdbc.driver.OracleDriver());
        Connection con=DriverManager.getConnection(
              "jdbc:oracle:thin:@localhost:1521:xe","lms","abc");
        Statement stmt=con.CreateStatement();
        stmt.executeUpdate("create table emp(eno number(5),name varchar2(20))");
    }
}

遇到的错误是：

Exception in thread "main" java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=185599488)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)
        at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:404)
       at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:468)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
        at java.sql.DriverManager.getConnection(DriverManager.java:579)
        at java.sql.DriverManager.getConnection(DriverManager.java:221)
        at DBCreateTable.main(DBCreateTable.java:7)

在我的sql命令中，我完成了以下操作。

    SQL> connect system/tiger;
    SQL> create user lms identified by abc;
    SQL> grant connect,resource to lms;

和plz告诉我什么是斯科特老虎。谢谢