Java
1. Java
Java is a powerful programming language that lets you write programs that run virtually anywhere!
2. Profilers
I've tried both YourKit and JProfiler. Both were sufficient for my needs and integrate well into IntelliJ.
YourKit costs $499 (389 EUR) for a single user license. Upgrades from previous versions are at a 50% discount.
JProfiler costs $499 (409 EUR). With 1 year support/upgrades is $698 (599 EUR). Further upgrades for a single license are $179 (159 EUR).
3. JDBC
MySQL
Troubleshooting
Address already in use: connect
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.BindException: Address already in use: connect
STACKTRACE:
java.net.SocketException: java.net.BindException: Address already in use: connect
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:284)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2555)
at com.mysql.jdbc.Connection.<init>(Connection.java:1485)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
It isn't saying that its trying to listen on a local socket, but can't create a socket. Check that an excessive amount of TCP sockets aren't already open using netstat.
5. System Properties
The JVM takes arguments on the command line -Dname=value
e.g. To specify the default timezone, java -Duser.timezone=GMT
6. JSR
JSR 310: Date time calendar API
We're using Joda Time as a replacement date time API in our code.