How to connect Mysql with JDBC with null password

[Andrew Ma]

I want to use JDBC to connect Mysql, but currently the user is root and password is null. Please help me. Thank you.

My test code is following:
----------------------------
public class Test {
public static void main(String[] arg) {
try {
Class.forName("org.gjt.mm.mysql.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test_df","root", "");
} catch(Exception e) {
e.printStackTrace();
}
}
}

The exception is following:
------------------------------
java.lang.ExceptionInInitializerError
at com.mysql.jdbc.ResultSet.getString(ResultSet.java:1948)
at com.mysql.jdbc.Connection.initializePropsFromServer(Connection.java:983)
at com.mysql.jdbc.Connection.connectionInit(Connection.java:905)
at com.mysql.jdbc.Driver.connect(Driver.java:311)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at com.etchsoft.datafairy.Test.main(Test.java:21)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: 192
at java.lang.String.charAt(String.java:444)
at com.mysql.jdbc.StringUtils.<clinit>(StringUtils.java:48)
... 7 more
Exception in thread "main"