SQL> create user test_user identified by qqq;

User created.
...
SQL> conn test_user@test
Enter password: ***
Connected.
SQL> create table test_table(x int);

Table created.

 import  java.sql.*;
 public   class  test 
{
     public   static   void  main(String[] args)  throws  Exception
    {
        DriverManager.registerDriver ( new  oracle.jdbc.driver.OracleDriver());
        Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:test", "tim", "t");
        DatabaseMetaData dbmd = conn.getMetaData();
        ResultSet rs = dbmd.getTables( null , "TEST_USER",  null ,  new  String[] {"TABLE"});
         while  (rs.next())
        {
            System.out.println(rs.getString("TABLE_NAME"));
        }
        rs.close();
        conn.close();
    }
}

D:\temp>java -cp .; test
TEST_TABLE