Java: JDBC: Connect with existing connection
If our java program runs in an already connected environment, it is not necessary to open a new connection with jdbc.It is just enough to use jdbc:default:connection string. This is…
Java: How to set Java version
With java -version at command prompt you can see which java version you are running: >java -versionjava version "1.6.0_21"Java(TM) SE Runtime Environment (build 1.6.0_21-b07)Java HotSpot(TM) Client VM (build 17.0-b17, mixed…
Java: Recursive Decompiler
In order to decompile huge amount of java code, which is in directories and sub-directories etc, you can use the following technique: Create 2 directories in the same path in…
Java: Primitive Data Types
Primitive Type Size Range of Values (inclusive) byte 8 bits –128 to 127 short 16 bits –32768 to 32767 int 32 bits –2147483648 to 2147483647 long 64 bits –9223372036854775808…
Java: Wooden Language
The program below uses the typical expressions of the so called "wooden language" which is actually talking with impressive expressions but finally say nothing. I was originally inspired from the…
Java: Connect to DB and fetch data
With the code below you can connect to an Oracle database using JDBC driver and fetch some data: (you can find the libraries needed below) import java.sql.*;import java.util.Date;import java.util.Properties;public class…