YourKit is a great Java profiling tool. It is a commercial software but you can get a free 15-day evaluation license key for a fully functional version of the profiler.
The past week I was working on a Java project and the software was very slow. Using YourKit I could easily find the bottleneck. It turned out that 94% of the time was spent in a function that I implemented in a naive way. Choosing a better algorithm the software got much faster. A profiler is really useful…
For Java I use Eclipse. YourKit integrates in Eclipse perfectly through an Eclipse plugin.
Here is an excellent post about Python profiling.
I found an old project of mine called Jerly. I wrote it in 2004-2005. I tried it in 2017 and it still works fine :) You can find it on GitHub.
Jerly is a Java implementation of Earley’s efﬁcient parsing algorithm for lambda-free context-free grammars. To put it in a nutshell, it tells you if a word can be generated with a set of rules or not.
I started to use Java again (I haven’t touched it for 5 years…) and I found a very nice JUnit tutorial. Here it is: http://www.vogella.com/tutorials/JUnit/article.html .
Maybe it’s not the best but I like it :) And it has a free version, which is perfect for my needs.
I prefer to use the official Java version that I download directly from Oracle. However, I noticed that XMind tends to use some older versions of Java (OpenJDK, etc.). How to tell XMind which Java to use?
After starting XMind, you can verify which Java it uses. Go to: Help -> About XMind, and click on the button Installation Details. Finally choose the tab Configuration. Here find the line “
-vm” and check its value in the next line. This is the virtual machine XMind has found.
xmind.ini and add this line to the top:
In my case “
/opt/java/bin/java -version” produces the following output:
java version "1.7.0_21" Java(TM) SE Runtime Environment (build 1.7.0_21-b11) Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)
BeautifulSoup is an HTML parser library for Python.
I installed Oracle Java 7 to
/opt/java. When I start vuze and check Help -> About, it says it is still using Java 6. Hmm…
Edit the vuze launch script:
JAVA_PROGRAM_DIR="/opt/java/bin/" # Add the trailing slash!
From the license of Java, Section 3:
“… You acknowledge that Licensed Software is not designed or intended for use in the design, construction, operation or maintenance of any nuclear facility. …”
It seems the original text has changed. The new version says: “You agree that neither the Software nor any direct product thereof will be exported, directly, or indirectly, in violation of these laws, or will be used for any purpose prohibited by these laws including, without limitation, nuclear, chemical, or biological weapons proliferation.”
Hmm, I preferred the old one :(