Tag Archives: Java

When and how much to mix technologies for a project?

Posted on August 15, 2015 by

The main idea behind using a technology is to harness the power of code re-usability and libraries that have already been worked on and trusted to be working and functional with minimal or no issues. The term “Technology” does not … Continue reading →

Posted in Oracle, Oracle ADF, Oracle SQL, OSB, Weblogic | Tagged , , , , , , , , , , | Leave a comment

Util Method to get all attributes printed in System.out.println()

Posted on August 14, 2015 by

This small util override is to allow developers to view all instance variable values as a CSV format in Java. It is similar to the one seen as var_dump in PHP: @Override public String toString() { Field[] fields = this.getClass().getDeclaredFields(); … Continue reading →

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How to Left pad Zeros to integer to get String in Java

Posted on July 28, 2015 by

The below is the code as to how to add 0 Padding to the left of an integer to format it to string: import java.text.DecimalFormat; public String padZeros(int i) { DecimalFormat df = new DecimalFormat(“00”); return df.format(start); } Change the … Continue reading →

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How to do an LDAP Search of Various fields

Posted on April 10, 2015 by

Requirement: retrieving various values such as Description, Office, etc. from LDAP after authentication. An LDAP client retrieves attribute values (referred to as “fields” in the question) by transmitting a search request to the server and then reading the server’s response. A … Continue reading →

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Email Validation

Posted on November 13, 2014 by

CHALLENGE DESCRIPTION: You are given several strings that may/may not be valid emails. You should write a regular expression that determines if the email id is a valid email id or not. You may assume all characters are from the … Continue reading →

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Swaps letters’ case in a sentence. All non-letter characters should remain the same.

Posted on November 13, 2014 by

INPUT SAMPLE: Your program should accept as its first argument a path to a filename. Input example is the following Hello world! JavaScript language 1.8 A letter OUTPUT SAMPLE: hELLO WORLD! jAVAsCRIPT LANGUAGE 1.8 a LETTER Solution import java.io.BufferedReader; import … Continue reading →

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How to check if 2 Date Ranges Overlap in Java

Posted on November 13, 2014 by

Code to check if 2 date ranges overlap each other or not. /** * @return boolean true in case the date ranges overlap. */ boolean isOverLaped(Date start1,Date end1,Date start2,Date end2) throws NullPointerException{ if ((start1.before(start2) && end1.after(start2)) || (start1.before(end2) && end1.after(end2)) … Continue reading →

Posted in Java | Tagged , , | 8 Comments