December 2011 – Page 3 – Gain More Knowledge

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How to view the contents of a jar file.
Command

// From the cmd line
jar -tvf fileName.jar

Example Output

C:\BrowserGUI\dist>jar -tvf BrowserGUI.jar
     0 Sat Nov 26 21:46:28 PST 2011 META-INF/
   106 Sat Nov 26 21:46:26 PST 2011 META-INF/MANIFEST.MF
 39313 Sat Nov 26 21:46:26 PST 2011 GUIAboutTab.class
 39952 Sat Nov 26 21:46:26 PST 2011 GUIFrame.class
 45354 Sat Nov 26 21:46:26 PST 2011 GUITabbedPane.class
  5244 Sat Nov 26 21:46:26 PST 2011 GUImain.class
   691 Sat Nov 26 21:46:26 PST 2011 NewJFrame$1.class
   509 Sat Nov 26 21:46:26 PST 2011 NewJFrame$2.class
 15458 Sat Nov 26 21:46:26 PST 2011 NewJFrame.class

Check out the Java Package Tutorial for more infomation.

Larry Battle

I love to program, and discover new tech. Check out my <a href="http://stackoverflow.com/users/527776/larry-battle">stackoverflow</a> and <a href="https://github.com/LarryBattle">github</a> accounts.

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REM filename: openAndORCreateFileTXT.bat
rem\ >> file.txt && file.txt

The following will open a existing file named file.txt. However, it if doesn’t exist then it will create it for you then open it. This is very useful.

“rem\” Let’s you return a empty character.
“>> file.txt” appends the returned value on the left hand side, which in this case is nothing.
“&& file.txt” once the left hand operation is done, then open the file ( file.txt).

Larry Battle

I love to program, and discover new tech. Check out my <a href="http://stackoverflow.com/users/527776/larry-battle">stackoverflow</a> and <a href="https://github.com/LarryBattle">github</a> accounts.

Month: December 2011

Use the contents of a jar file.

Larry Battle

Code of the Day: DOS Open an existing file or create it if it doesn’t exist

Larry Battle