I want to clean user input for help preventing XSS attacks and we don’t necessarily care to have a HTML whitelist, as our users shouldn’t need to post any HTML / CSS. Eyeing the alternatives out there, which would be better? [Apache Commons Text’s StringEscapeUtils] [1] or [JSoup Cleaner][2]…
How to run java code in a restricted sandbox (without network, filesystem access)
Say some programmer gives me an executable jar (from Java code) along with the entry point to use. I want to run this jar (programmatically) from Java code in a restricted sandbox environment with no …
Is it bad practice to separate sections of code inside one method with curly brackets? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 1 year ago. Improve this question I tend put multiple lines of code that fullfill a certain task into bl…
how can you programmatically set the JSplitPane to hide the right/bottom component when OneTouchExpandable is set to true?
In a JSplitPane, you have the setOneTouchExpandable method which provides you with 2 buttons to quickly fully hide or full show the JSplitPane. My question is how can you programmatically “click” the hide button on the JSplitPane? I may have wrongly explained myself. I want the splitpane to show o…
difference between natural ordering and total ordering
I happen to come across many statements like comparable is used when natural ordering is required while sorting an array or collection and comparator for total ordering. The version you may have heard could be same or different with the same meaning but ultimately its one of the distinguishing factors between…
What are good light-weight design patterns for avoid nulls in Java?
Obviously one of the greatest banes of Java programming is nulls and null-pointer exception. What design patterns are there that don’t add too much to your code but reduce the problem of sand null-pointer exceptions? Answer Null Object pattern. Look at Optional class from google-guava library. Their wik…
Generate a image with custom text in Android
I’m trying to make an app for create custom cards. I’d like to add some text over a custom background (a jpg image). What is the best way of doing it? I’d need to show the user a preview of the card before send it to the server. Thanks Answer Use below code to achieve your requirement You ha…
Cast Double to Integer in Java
Any way to cast java.lang.Double to java.lang.Integer? It throws an exception “java.lang.ClassCastException: java.lang.Double incompatible with java.lang.Integer” Answer A Double is not an Integer, so the cast won’t work. Note the difference between the Double class and the double primitive.…
Unix grep for Java logs
I am new to Unix grep and i would like some help to come up with a grep command. Currently, i have the following types of error in my application logs: 2012-02-31 10:21:41,333 ERROR [65] (GeneralAppliancesBean.java:135) – Exception java.net.ConnectException: Connection timed out 2012-01-31 10:24:41,843 …
Lucene: Multi-word phrases as search terms
I’m trying to make a searchable phone/local business directory using Apache Lucene. I have fields for street name, business name, phone number etc. The problem that I’m having is that when I try to search by street where the street name has multiple words (e.g. ‘the crescent’), no resu…