How to connect JDBC to tns oracle

Question

I can connect from plsql to database using tns file

Now I want to connect to the database from my Java using JDBC.

What I tried:

I search google an

Answer 1

Rather than hard code the path to tnsnames.ora, better to find it from the environment:

public static void setTnsAdmin() {
    String tnsAdmin = System.getenv("TNS_ADMIN");
    if (tnsAdmin == null) {
        String oracleHome = System.getenv("ORACLE_HOME");
        if (oracleHome == null) {
            return; //failed to find any useful env variables
        }
        tnsAdmin = oracleHome + File.separatorChar + "network" + File.separatorChar + "admin";
    }
    System.setProperty("oracle.net.tns_admin", tnsAdmin);
}