import java.sql.*;

public class Test {
    public static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
    public static final String DBURL = "jdbc:oracle:thin:@localhost:1158:mldn" ;
    public static final String DBUSER = "scott" ;
    public static final String DBPASS = "tiger" ;
   
    public static void main(String[] args) {
        Connection conn = getConnection();
        if (conn != null) {
            System.out.println("success!");
        } else {
            System.out.println("error!");
        }
    }
   
    public static Connection getConnection() {
        Connection conn = null;
        
        try {
            Class.forName(DBDRIVER);
        } catch (ClassNotFoundException e) {
        //    e.printStackTrace();
        }
        
        try {
            conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        
        return conn;
    }
}

java.sql.SQLException: Got minus one from a read call
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:185)
    at Test.getConnection(Test.java:28)
    at Test.main(Test.java:10)
Caused by: Got minus one from a read call
    at (Packet.java:285)
    at (NSProtocol.java:286)
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
    ... 8 more
error!

帮忙回答啊，朋友们》。。。

嗯嗯，谢谢各位,以解决......