how to make sure that my connection to database works?

how to make sure that the connection string to my orical data base is correct.
this is my conection code in java

 // Database Connection object
    Connection conn = null;
 
    // Set database URL details.
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    try {
     
      // Instantiate the driver class.
      Class.forName("oracle.jdbc.OracleDriver");
     
      // Get the database connection.
      conn = DriverManager.getConnection(url,"system","pass");
    }catch (Exception ex) {
        System.out.println("Exception while getting database connection: "
                           +ex.toString() );

can any one help me to write a select statment to make sure that it goes to my database???

I have this table created:
SQL> CREATE TABLE product_information(PRODUCT_ID           NUMBER(6)      NOT NULL,                                      PRODUCT_NAME         VARCHAR2(50)   NOT NULL,                                      PRODUCT_DESCRIPTION  VARCHAR2(2000) NOT NULL,                                       MIN_PRICE            NUMBER(8,2),                                      LIST_PRICE           NUMBER(8,2));SQL> INSERT INTO product_information VALUES(2400, 'DIMM - 512 MB',         '512 MB DIMM memory. Improved memory upgrade granularity', 380, 448);SQL> INSERT INTO product_information VALUES(2401, 'DIMM - 64MB',        'Memory DIMM: RAM, 64MB (100-MHz Unregistered ECC SDRAM)', 202, 247);SQL> INSERT INTO product_information VALUES(2402, 'EDO - 32MB',        'Memory EDO SIM: RAM, 32 MB (100-MHz Unregistered ECC SDRAM)', 149, 179);
fm134Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

JaaxArchitectCommented:
You could code like this after securing the connection
conn = DriverManager.getConnection(url,"system","pass");
PreparedStatement prep = conn.prepareStatement("select * from product_information");
ResultSet rs = prep.executeQuery();
//Iteratore over the resultset


prep = conn.prepareStatement("select sysdate from dual");
rs = prep.executeQuery();
while(rs.next()){
      System.out.println("Date : "+rs.getDate("sysdate"));

}

OR querying to dual to check DB connection

PreparedStatement prep = conn.prepareStatement("select sysdate from dual");
ResultSet rs = prep.executeQuery();
while(rs.next()){
      System.out.println("Date : "+rs.getDate("sysdate"));

}



0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.