Use the contents of a jar file.

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.

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


Warning: WP_Syntax::substituteToken(): Argument #1 ($match) must be passed by reference, value given in /home/bateeqjg/public_html/news/wp-content/plugins/wp-syntax/wp-syntax.php on line 380
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).

Code of the Day: Groovy Print all Methods of an object


Warning: WP_Syntax::substituteToken(): Argument #1 ($match) must be passed by reference, value given in /home/bateeqjg/public_html/news/wp-content/plugins/wp-syntax/wp-syntax.php on line 380

Warning: WP_Syntax::substituteToken(): Argument #1 ($match) must be passed by reference, value given in /home/bateeqjg/public_html/news/wp-content/plugins/wp-syntax/wp-syntax.php on line 380

Warning: WP_Syntax::substituteToken(): Argument #1 ($match) must be passed by reference, value given in /home/bateeqjg/public_html/news/wp-content/plugins/wp-syntax/wp-syntax.php on line 380

Groovy Code

/**
* @function printAllMethods
* @purpose Prints an objects class name and then list the associated class functions.
*/
// Filename: printAllMethodsExample.groovy
void printAllMethods( obj ){
    if( !obj ){
		println( "Object is null\r\n" );
		return;
    }
	if( !obj.metaClass && obj.getClass() ){
        printAllMethods( obj.getClass() );
		return;
    }
	def str = "class ${obj.getClass().name} functions:\r\n";
	obj.metaClass.methods.name.unique().each{ 
		str += it+"(); "; 
	}
	println "${str}\r\n";
}

Example Code

// Filename: printAllMethodsExample.groovy
void printAllMethods( obj ){
    if( !obj ){
		println( "Object is null\r\n" );
		return;
    }
	if( !obj.metaClass && obj.getClass() ){
        printAllMethods( obj.getClass() );
		return;
    }
	def str = "class ${obj.getClass().name} functions:\r\n";
	obj.metaClass.methods.name.unique().each{ 
		str += it+"(); "; 
	}
	println "${str}\r\n";
}
printAllMethods( null );
printAllMethods( 1 );
printAllMethods( "string" );
printAllMethods( [1:1] );

Output

Object is null
 
class java.lang.Integer functions:
equals(); getClass(); hashCode(); notify(); notifyAll(); toString(); wait(); byteValue(); doubleValue(); floatValue(); intValue(); longValue(); shortValue(); bitCount(); compare(); compareTo(); decode(); getInteger(); highestOneBit(); lowestOneBit(); numberOfLeadingZeros(); numberOfTrailingZeros(); parseInt(); reverse(); reverseBytes(); rotateLeft(); rotateRight(); signum(); toBinaryString(); toHexString(); toOctalString(); valueOf(); 
 
class java.lang.String functions:
equals(); getClass(); hashCode(); notify(); notifyAll(); toString(); wait(); charAt(); codePointAt(); codePointBefore(); codePointCount(); compareTo(); compareToIgnoreCase(); concat(); contains(); contentEquals(); copyValueOf(); endsWith(); equalsIgnoreCase(); format(); getBytes(); getChars(); indexOf(); intern(); isEmpty(); lastIndexOf(); length(); matches(); offsetByCodePoints(); regionMatches(); replace(); replaceAll(); replaceFirst(); split(); startsWith(); subSequence(); substring(); toCharArray(); toLowerCase(); toUpperCase(); trim(); valueOf(); 
 
class java.lang.Class functions:
equals(); getClass(); hashCode(); notify(); notifyAll(); toString(); wait(); clear(); containsKey(); containsValue(); entrySet(); get(); isEmpty(); keySet(); put(); putAll(); remove(); size(); values(); clone();