Category Archives: java

java

How to write Java lambda Expression ?

Posted on October 10, 2017 by lorddisk

Lambda expression is a new and important feature of Java which was included in Java SE 8. It provides a clear and concise way to represent one method interface using an expression. It is very useful in collection library. It … Continue reading →

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oracle.security.jps.service.idstore.IdentityStoreException: JPS-01520: Cannot initialize identity store at starting OBIEE

Posted on December 19, 2014 by lorddisk

[bi_server1] [WARNING] [JPS-01520] [oracle.jps.idmgmt] [tid: [ACTIVE].ExecuteThread: ‘0’ for queue: ‘weblogic.kernel.Default (self-tuning)’] [userId: <WLS Kernel>] [ecid: 0000KdVfAivApIWFLzNM8A1K^prs000002,0] [APP: bicomposer#11.1.1] Cannot initialize identity store, cause: javax.naming.CommunicationException: 2001:0:9d38:90d7:280c:3b5:3f57:ebcd:9704 [Root exception is java.net.ConnectException: connect: Address is invalid on local machine, or port is not … Continue reading →

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run linux command from java and reading result?

Posted on January 13, 2012 by lorddisk

import java.*; class Test { public static void main(String[] args) { int ch; try { Process myProcess = Runtime.getRuntime().exec(“ls -al”); InputStreamReader myIStreamReader = new InputStreamReader(myProcess.getInputStream()); while ((ch = myIStreamReader.read()) != -1) { System.out.print((char) ch); } } catch (IOException anIOException) { … Continue reading →

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Introduction to Web Services

Posted on December 16, 2011 by lorddisk

Web services are distributed application components that are externally available. You can use them to integrate computer applications that are written in different languages and run on different platforms. Web services are language and platform independent because vendors have agreed … Continue reading →

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String in java

Posted on November 24, 2011 by lorddisk

Java Programming String is Special A Brief Summary of String Class A String contains a sequence of Unicode characters. Unlike C/C++, where string is simply an array of char, Java’s String is an object class in the core package java.lang. … Continue reading →

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How to use ContextLoaderListener,how to make application Listener

Posted on November 24, 2011 by lorddisk

publicclass Main extends org.springframework.web.context.ContextLoaderListener {  /** *@param args */ DatabaseListner listener = new DatabaseListner(); publicvoid contextDestroyed(ServletContextEvent event) { super.contextDestroyed(event); listener.end(); listener = null; System.out.println(“web app undeployed”); } publicvoid contextInitialized(ServletContextEvent event) { super.contextInitialized(event); new Thread(){ publicvoid run() { listener.listen(); } }.start(); … Continue reading →

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move directory in Java ,convert file to linux,remove CRLF

Posted on November 24, 2011 by lorddisk

privatevoid moveFilesFromSourceToDestination(String sourceFolder,String destinationFolder) throws IOException{log.info( “trying move “+sourceFolder+” to “+destinationFolder ); File sFolder = new File(sourceFolder); File dFolder = new File(destinationFolder); for (File file : sFolder.listFiles()){ if (file.isFile()){ File newFile = new File(dFolder.getAbsolutePath() + “/”+file.getName()); moveFile(file,newFile); }elseif (file.isDirectory()){ File … Continue reading →

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how To sort a hashmap using its keys and/or values

Posted on October 30, 2011 by lorddisk

To sort a hashmap using its keys :- Dump the HashMap into a TreeMap: Map yourMap= new HashMap(); // put some tuples in yourMap … Map sortedMap = new TreeMap(yourMap); To sort a hashmap using its values :- public HashMap getSortedMap(HashMap hmap) … Continue reading →

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[Java] Reverse ordering a TreeMap

Posted on October 30, 2011 by lorddisk

TreeMap is a Map that keep the element in the natural order of the key. The order can be changed providing to the contructor of the TreeMap a Comparable. So you can implement your custom one for more specific tasks. However if you only … Continue reading →

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junit music box on eclipse

Posted on October 27, 2011 by lorddisk

  http://www.brettdaniel.com/archives/2009/05/23/232945/

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