Title might be little misleading since in java we pass always by value, but we can mimic passing by reference. /** * This class allows us to pass values by reference ranter than value. * Not directly as java just passes reference of the object by value but indirecly * @author Greg * * @param …
While using HTML Tidy I needed to remove the DOCTYPE prolog to prevent ‘org.xml.sax.SAXParseException: Already seen doctype.’ exception. Regex is quite simple, only catch is that we need to make sure we include the \n\r in our selecton and make it not greedy. convertedData = convertedData.replaceAll("<!DOCTYPE((.|\n|\r)*?)\">", ""); convertedData = convertedData.replaceAll("<!DOCTYPE((.|\n|\r)*?)\">", ""); This will consume multiline …
This is snipper of my ANTLR grammar for parsing expressions with operator precedence, By default the expressions are evaluated left to right which in some cases may produce undesired results, in order to fix that use of left and right parenthesis is required. For example this two expressions will be evaluated differently 3 > 2 …
To work around this error Custom port is not allowed or the host is not registered with this consumer key. Register the app as Desktop/Client application instead of web app.
Simply adding @Transactional on the method will resolve this issue
Other day I needed to convert excel spreadsheet column name to column index when having 200+ columns is easier to express as ‘FB’ instead of 157 A = 0 B = 1 AA = 26 AA = 27 FB = 157 This code will work for any number of column names. /** * Convert given …
Convert given excel column name to column Index, ex ‘A=0’, ‘AA=26’ Read More »
The other day I needed to read output stream directly into a string, but JDK does not provides us with a stream directly for that. There have been numerous discussions on why and why not we should have this build into the JDK, but this was a case where I did need it and knew …
StringOutputStream backed by ByteArrayOutputStream Read More »
For cross compatability between sql and mysql servers when we do a division on a aggregated variable like count we need to promote the INT to a DOUBLE type by multiplying it by 1.00 otherwise our results will loose precision Examples 1/2=0 Incorrect Results 1.00/2=.5 or 1.00/2.00=.5 Good For sake of consistency both variables have …
Detecting Wide Area Network(WAN) IP programmatically This is a reliable way to detect WAN IP address from Java, cpp or any other programming language. Motivation for this was my need to update my DNS server automatically, presented code will be in Java I have decided to use Java for cross-platform support and its my favorite …
Detecting Wide Area Network(WAN) IP programmatically Read More »
While upgrading machines I have upgraded to run jdk 1.6 which have screwed up compiling of my reports with following error. C:\Program Files (x86)\Java\jdk1.6.0_24\jre\lib\endorsed Source File:c:/Users/greg/report2.jrxml Exception in thread "main" net.sf.jasperreports.engine.JRRuntimeException: Error creating SAX parser at net.sf.jasperreports.engine.xml.JRReportSaxParserFactory.createParser(JRReportSaxParserFactory.java:109) at net.sf.jasperreports.engine.xml.JRXmlDigesterFactory.createParser(JRXmlDigesterFactory.java:1320) at net.sf.jasperreports.engine.xml.JRXmlDigesterFactory.createDigester(JRXmlDigesterFactory.java:1295) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:199) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:164) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:148) at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:85) at com.americanbanksystems.complianceproreports.util.CompileReport.compileReport(CompileReport.java:133) at com.americanbanksystems.complianceproreports.util.CompileReport.main(CompileReport.java:189) Caused by: …
