Extracting the contents of the String

[Satyajeet Kadam]

i want to extract the "name of the file" from "Path "
for example path is as follows
file opened "D:\eclipse\POST_5227\gui\Trustdata\Quick.t05"
I want to extract "Quick.t05" in next line
Plese help me to acheive this, please write code ?

[Paul Sturrock]

Plese help me to acheive this, please write code ?

Its not in the spirit of this site to write code for people on request. JavaRanch's purpose is as a learning resource. If we do yuor work for you how do you ever learn anything?

Sounds like you need to read up on Regular Expressions. Have a look at the JavaDocs for the java.util.regex package.

[pascal betz]

i'll write the code if i can send you the bill :-)
Usualy you show us what you've done so far and where the problem is. Then we help you to solve this problem. We do not write code for you. We do not solve homework.

Take a look at java.util.File class. It offers what you want to do for free :-) Or look at String.indexOf() and String.substring(). Or try the regexp stuff.

pascal

[Satyajeet Kadam]

Extracting a path from a complete filename?
I tried myself but i get exception

    
 
String j =TaxSystem.fileOpened;  
System.out.println("name of the file that is opened" +j);
 
String b= j.substring(0,j.lastIndexOf(java.io.File.pathSeparator));

System.out.println("name of file opened by the user is=="+b);
 

xception in thread "AWT-EventQueue-0" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(Unknown Source)
at gui.TaxSystem.actionPerformed(TaxSystem.java:1928)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[Jesper de Jong]

It's much easier than you think. If you have a java.io.File object that contains the path, then just call getName() on it to get just the filename (without the path). See the API documentation of class java.io.File.

String j =TaxSystem.fileOpened;  
System.out.println("name of the file that is opened" +j);
 
String b= new java.io.File(j).getName();

System.out.println("name of file opened by the user is=="+b);

[ November 06, 2006: Message edited by: Jesper Young ]