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 [oracle@liwei admin]$ sqlplus / as sysdba
 
 SQL*Plus: Release 10.2.0.1.0 - Production on Thu May 1 15:55:18 2008
 
 Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 
 Connected to an idle instance.
 
 SQL> quit
 Disconnected
 [oracle@liwei admin]$ sqlplus "/ as sysdba"
 
 SQL*Plus: Release 10.2.0.1.0 - Production on Thu May 1 15:55:24 2008
 
 Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 
 Connected to an idle instance.
 
 SQL> quit
 Disconnected
 
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 [oracle@liwei oracle]$ sqlplus "/ as sysdba"
 
 SQL*Plus: Release 10.2.0.1.0 - Production on Thu May 1 14:51:59 2008
 
 Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 
 ERROR:
 ORA-01031: insufficient privileges
 
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package com.deng.oracle;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class TestOracle {
public static void main(String[] args) {
try {
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