Java Connect to Oracle Database (JDBC)

create table customer
(
CUSTOMERID varchar2(4),
NAME varchar2(50),
EMAIL varchar2(50),
COUNTRYCODE varchar2(3),
BUDGET number,
USED number
)
tablespace SYSTEM
storage
(
initial 64K
minextents 1
maxextents unlimited
);
alter table customer
add constraint PK_CUSTOMER primary key (CUSTOMERID);

INSERT INTO customer VALUES ('C001', 'Win Weerachai', '[email protected]', 'TH', 1000000, 600000);
INSERT INTO customer VALUES ('C002', 'John  Smith', '[email protected]', 'UK', 2000000, 800000);
INSERT INTO customer VALUES ('C003', 'Jame Born', '[email protected]', 'US', 3000000, 600000);
INSERT INTO customer VALUES ('C004', 'Chalee Angel', '[email protected]', 'US', 4000000, 100000);

package com.java.myapp;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class MyClass {

	public static void main(String[] args) {
		
		Connection connect = null;
		
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			connect =  DriverManager.getConnection("" +
					"jdbc:oracle:thin:@TCDB", "myuser","mypassword");
			if(connect != null){
				System.out.println("Database Connected.");
			} else {
				System.out.println("Database Connect Failed.");
			}
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		try {
			connect.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
}