Win a copy of Think Java: How to Think Like a Computer Scientist this week in the Java in General forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Replace Text

 
Mudit Srivastava
Ranch Hand
Posts: 38
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi All,

I have a text file which contains the following content

ABC=true
XYZ=true
DEF=false

I want to read from this file and check the property XYZ. If found true, I must replace with false. I am now unsure of how to delete the existing "true" value of XYZ from the file.

My current approach is as follows:



Kindly help since i have to create the entire file again using the ArrayList after clearing the entire content
 
Balu Sadhasivam
Ranch Hand
Posts: 874
Android Java VI Editor
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Mudit,

If your file is in format of key-value pair , you can use Properties API to acheive this.Note that Properties requires your file to be with .properties extn.

Use setProperty() method to change the proprty you want and then use Properties save method( on same loaded properties object) to save the properties to a file.

HTH


 
Mudit Srivastava
Ranch Hand
Posts: 38
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks for the post Balu.

Trouble is that I'm stuck with the .txt extension so I can't switch to the Properties API.
 
Ulf Dittmer
Rancher
Posts: 42967
73
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The Properties class doesn't care about the file extension - it can be anything you want.
 
Balu Sadhasivam
Ranch Hand
Posts: 874
Android Java VI Editor
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

The Properties class doesn't care about the file extension - it can be anything you want.


yes , Thanks for the correction.
 
Mudit Srivastava
Ranch Hand
Posts: 38
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks guys. The Properties API worked like a charm..
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic