Algorithm / Java Code examples

Hi there, is there anyway I can get simple algorithms, java examples of these below -
Adjacency Matrix
Transitive Closure Matrix
Shortest-path algorithm
DFS and BFS traversal
Floyd all-pairs shortest path algorithm
Topological Sort
Reverse DFS Topological Sort
I googled them but couldn't get enough success. Please help me out. Any suggestions would be appreciated. Thanks a lot!

Continue googling, and add java to the search criteria. E.g.
java Adjacency Matrix

Similar Messages

A Toplink Java code example in Jdev 10.1.2

Hello every body
I have just begun using Toplink 10g in Jdev 10.1.2, and I want examples of Java code to insert, edit and show information from struts application whose model is Toplink.
Thanks

If you are using toplink 9045 which ships with Jdev 1012, and just starting out then you might consider using Jdev1013 along with toplink 1013 since there is some measurable difference between the two releases.
Information about toplink and examples.
http://www.oracle.com/technology/products/ias/toplink/examples/index.html
http://www.oracle.com/technology/products/ias/toplink/technical/index.html

Berkeley DB master-slave replication basic java code example

Hi,
I am new user of berkeley db and I have limited knowledge of Java programming. Can someone help me with basic Java example code of how to do master-slave replication without elections.
Thanx,
Jani

Hello,
Please clarify a few points about your program:
1. What platform and Berkeley DB version are you using?
2. Are you planning on using the replication framework
or base replication API for your application?
3. When you say you want replication without elections,
what exactly does that mean. For example, if you are using
the replication framework elections are held transparently
without any input from your application's code. In this case,
DB will determine which environment is the master and which
are replicas. Is that what you are thinking about or
something else?
Thanks,
Sandra

Programatically calling control flows from java code

Hi all,
I have a bounded taskFlow that uses pageFragments. This flow is a region in a page(.jspx).
In my page fragment, I have a inputComboboxListOfValues with a ValueChangeListener code in a java bean.
I want when a value is changed, to programatically call "controll flow" (this one has: "From Activity Id" -the page fragment with that inputComboboxListOfValues, and "To Activity Id" - the default Activity on this task Flow).
So when the value change, practically I want to restart the flow programatically and pass the selected value as input parameter.
Since the inputComboboxListOfValues is not like a button where in the "Action" property you can set the Control Flow and navigate somewhere, the only option I have is to programatically cause navigation from java code (example: the value change listener code).
Can this be achieved?
Any advice is helpfull.

Hi,
Absolutely, you can do it using the NavigationHandler. Try the following in you value change listener:
FacesContext context = FacesContext.getcurrentInstance();
NavigationHandler handler = context.getApplication().getNavigationHandler();
handler.handleNavigation(context, null, outcome);
// Render the response after that phase, the button actions should not be called
context.renderResponse();
// Add the following line if you want to prevent further value change listeners to be called
// throw new AbortProcessingException();Regards,
~ Simon

How to compile connection pool sample java code

I recently bought David Knox's "Effective Oracle Database 10g Security by Design", and have been working through his examples with client identifiers and how to leverage database security with anonymous connection pools.
The database side of things I totally understand and have set up, but I now want to compile/run the java code examples, but don't know what is required to compile this.
I'm running Oracle 10.2.0.4 (64-bit) Enterprise Edition on a Linux (RHEL 5) PC. Java version is 1.6.0_20. Relevant .bash_profile environment variables are as follows:
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=$ORACLE_HOME/jre:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib
export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin
When I try to compile, I get:
oracle:DB10204$ java FastConnect.java
Exception in thread "main" java.lang.NoClassDefFoundError: FastConnect/java
Caused by: java.lang.ClassNotFoundException: FastConnect.java
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: FastConnect.java. Program will exit.
The java source code of one of the examples is below. Is someone able to point me in the right direction as to how I get this to compile? Do I just have a syntax and/or environment configuration modification to do, or is there more to it than that to get this example working? Any help much appreciated.
oracle:DB10204$   cat FastConnect.java
package OSBD;
import java.sql.*;
import oracle.jdbc.pool.OracleDataSource;
public class FastConnect
public static void main(String[] args)
    long connectTime=0, connectionStart=0, connectionStop=0;
    long connectTime2=0, connectionStart2=0, connectionStop2=0;
    ConnMgr cm = new ConnMgr();
    // time first connection. This connection initializes pool.
    connectionStart = System.currentTimeMillis();
    Connection conn = cm.getConnection("SCOTT");
    connectionStop = System.currentTimeMillis();
    String query = "select ename, job, sal from person_view";
    try {
      // show security by querying from View
      Statement stmt = conn.createStatement();
      ResultSet rset = stmt.executeQuery(query);
      while (rset.next()) {
        System.out.println("Name:   " + rset.getString(1));
        System.out.println("Job:    " + rset.getString(2));
        System.out.println("Salary: " + rset.getString(3));
      stmt.close();
      rset.close();
      // close the connection which resets the database session
      cm.closeConnection(conn);
      // time subsequent connection as different user
      connectionStart2 = System.currentTimeMillis();
      conn = cm.getConnection("KING");
      connectionStop2 = System.currentTimeMillis();
      // ensure database can distinguish this new user
      stmt = conn.createStatement();
      rset = stmt.executeQuery(query);
      while (rset.next()) {
        System.out.println("Name:   " + rset.getString(1));
        System.out.println("Job:    " + rset.getString(2));
        System.out.println("Salary: " + rset.getString(3));
      stmt.close();
      rset.close();
      cm.closeConnection(conn);
    } catch (Exception e)    { System.out.println(e.toString()); }
    // print timing results
    connectTime = (connectionStop - connectionStart);
    System.out.println("Connection time for Pool: " + connectTime + " ms.");
    connectTime2 = (connectionStop2 - connectionStart2);
    System.out.println("Subsequent connection time: " +
                        connectTime2 + " ms.");
}Code download is at: http://www.mhprofessional.com/getpage.php?c=oraclepress_downloads.php&cat=4222
I'm looking at Chapter 6.

stuartu wrote:
When I try to compile, I get:
oracle:DB10204$ java FastConnect.java
Exception in thread "main" java.lang.NoClassDefFoundError: FastConnect/java
Caused by: java.lang.ClassNotFoundException: FastConnect.java
I will try to explain what is happening here.
You are launching java telling it to run a class named 'java' in a package named 'FastConnect'
and java says it cannot find that class.
What you intended to do:
$ # make the directory structure match the package structure
$ mkdir OSBD
$ # move the source file in the directory structure so it matches the package structure
$ mv FastConnect.java OSBD/
$ # compile OSBD/FastConnect.java to OSBD/FastConnect.class
$ javac OSBD/FastConnect.java
$ # launch java using the OSBD/FastConnect class
$ java -cp . OSBD.FastConnectNote that the package 'OSBD' does not follow the recommended naming conventions
you might consider changing that to 'osbd'.

Java code to fetch contact list from outlook

I have a requirement to get the contact list from outlook using java code. There are many hooks provided by third party and they are all licensed.
I want java code example which directly communicate with outlook.

you want to directly communicate with the Outlook program?? or do you want a program that can read the Outlook data? These are two very different problems, the first being relatively difficult, the second being easier.

I Need Java code for following Algorithm

* I Need Java code for following algorithm. Kindly any one help.
1. Read the contents (ideas and its corresponding scores) from two files named as 'a' and 'b'.
2. Stored the file 'a' contents in array a[].
3. Stored the file 'b' contents in array b[].
4. compare both files like
if(a.equals(b[j])
Writing the common idea and add the score from file 'a' and 'b'.
else
write the uncommon idea and its score..
For example :
Form Agents.txt
action,65
architecture,85
eco-,15
essay,30
form,85
form,85
link,40
tangent,25
Form Agents1.txt
Black holes,69
essay,78
Herewith i have above mentioned two files named as Form Agents and Form Agents1.
Form Agents has eight fields
Form Agents1 has two fields
--> 'essay' is common in two files, so store the idea 'essay' and add the score from Form Agents score is '30' and Form Agents1 has 78 (essay 108).
Finally it stores idea in another file with uncommon fields also.
Please help us.

We have tried with following code.
But we cant add the scores.
For Example:
Form Agents.txt --> has "essay,30"
Form Agents1.txt --> has "essay,78"
Result is: essay,108
Finally it stores idea in another file with uncommon fields also.
So Any one pls correct the following code.
try
DataOutputStream o1=new DataOutputStream(new
FileOutputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\CandidateResponses\\Form
Agents.txt"));
//Reading the contents of the files
BufferedReader br= new BufferedReader(new InputStreamReader(new
FileInputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\Ideological\\Form
Agents.txt")));
BufferedReader br1= new BufferedReader(new InputStreamReader(new
FileInputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\Related\\Form
Agents.txt")));
while((s=br.readLine())!=null)
s1+=s+"\n";
while((s2=br1.readLine())!=null)
s3+=s2+"\n";
int numTokens = 0;
StringTokenizer st = new StringTokenizer(s1);
String[] a = new String[10000];
String[] br_n=new String[10000];
int i=0;
while (st.hasMoreTokens())
s2 = st.nextToken();
a=s2.substring(0,s2.length()-3);
s6=s2.substring(s2.length()-2);
br_n[i]=s6;
i++;
numTokens++;
int numTokens1 = 0;
StringTokenizer st1 = new StringTokenizer (s3);
String[] b = new String[10000];
String[] br1_n=new String[1000];
int j=0;
while (st1.hasMoreTokens())
s4 = st1.nextToken();
b[j]=s4.substring(0,s4.length()-3);
s7=s4.substring(s4.length()-2);
br1_n[j]=s7;
j++;
numTokens1++;
int x=0;
for(int m=0;m<a.length;m++)
for(int n=0;n<b.length;n++)
if(a[m].equalsIgnoreCase(b[n])){
int sc=Integer.parseInt(br_n[m]);
int sc1=Integer.parseInt(br1_n[n]);
int score=sc+sc1;
o.writeBytes(a[m]+","+score+"\n");
break;
else
o.writeBytes(a[m]+","+br_n[m]+"\n");
break;
}catch(Exception e){}

ECM java client - example code

Hi,
Enviroment: ECM 11.x
I need to write ADF application integrated wit ECM. Is there any public java codes with examples ? I mean somethink like examples for SOA Suite http://java.net/projects/oraclesoasuite11g/pages/Home covers e.g. example how to write custom worklist. My requairement is to write some functionality from ECM console, so it would be useful to have some java api usage examples.
Kuba

Actually, what workflows you intend to use? And, what's your use case what-so-ever?
I hope I won't confuse you, but in fact, you could mean three things:
- use UCM native (iDocScript workflows)
- use BPEL workflows
- use BPM workflows (as BPM Suite is now also part of the license)
The last is completely driven from the BPM side, so there you don't need to do anything.
The second works like this: you may define a criteria workflow which passes the item to a BPEL workflow. When BPEL finishes, it passes the workflow back to release the item. If you have samples for SOA Suite, you could reuse them.
Only for UCM native workflows, you would need to write your own codes (calling services - most likely WS), but havinf the first two options, is it worth?

If any one has java code for any video compression algorithm

i need a complete java code for video compression step by step

i need a complete java code for video compression step by step

OIM Java task code example

Hello,
I need to create a process task which must do a SELECT statement on a remote Oracle database (for which I created a IT Resource of type Database) in order to retrieve some values. Can anybody provide me a code example of similar things?
Regards,
Adrian

Ya it's easy
Re: How to get ITResource to Adapter?
There is one more API getITAssetProperties of tcUtilXellerateOperations which give you all the values in a map.
Hashtable itResourceTable = tcUtilXellerateOperations.getITAssetProperties(dataProvider,itresourceName);
And dataProvider you can get from Adapter as a variable.

How to print/list all the groups/users present in Weblogic using Java code

Hi,
Weblogic version : 11.1.1.5
How to print/list all the groups/users present in Weblogic using Java code
I want to make a remote connection to Weblogic server and print all the users/groups present in it.
I have gone through the below mentioned site, but I cannot use the same approach since most of the API' are deprecated for example "weblogic.management.MBeanHome;"
http://weblogic-wonders.com/weblogic/2010/11/10/list-users-and-groups-in-weblogic-using-jmx/
Thanks in advance,
Edited by: 984107 on 05-Feb-2013 05:26
Edited by: 984107 on 05-Feb-2013 22:59

see this http://www.techpaste.com/2012/06/managing-user-groups-wlst-scripts-weblogic/
Hope this helps.

Updating an existing xml file using java code

hi friends,
I have simple problem, I have an existing xml file and I want to update some of the values in the file.
can any one send me the java code for that.
bye.
-harish

org.w3c.dom.Document d = parseXmlFile("D:/www/Detailcache/detail.xml", false);
public static Document parseXmlFile(String filename, boolean validating) {
try {
// Create a builder factory
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(validating);
// Create the builder and parse the file
Document doc = factory.newDocumentBuilder().parse(new File(filename));
return doc;
} catch (Exception e) {
System.out.println("ERROR-->");e.printStackTrace();
return null;
look at .. for more related examples
http://javaalmanac.com/egs/javax.xml.parsers/BasicDom.html?l=rel

How to pass arguments to a batch file from java code

Hi
I have a batch file (marcxml.bat) which has the following excerpt :
@echo off
if x==%1x goto howto
java -cp C:\Downloads\Marcxml\marc4j.jar; C:\Downloads\Marcxml\marcxml.jar; %1 %2 %3
goto end
I'm calling this batch file from a java code with the following line of code:
Process p = Runtime.getRuntime().exec("cmd /c start C:/Downloads/Marcxml/marcxml.bat");
so ,that invokes the batch file.Till that point its ok.
since the batch file accpets arguments(%1 %2 %3) how do i pass those arguments to the batch file from my code ...???
%1 is a classname : for ex: gov.loc.marcxml.MARC21slim2MARC
%2 is the name of the input file for ex : C:/Downloads/Marcxml/source.xml
%3 is the name of the output file for ex: C:/Downloads/Marcxml/target.mrc
could someone help me...
if i include these parameters too along with the above line of code i.e
Process p = Runtime.getRuntime().exec("cmd /c start C:/Downloads/Marcxml/marcxml.bat gov.loc.marcxml.MARC21slim2MARC C:\\Downloads\\Marcxml\\source.xml C:\\Downloads\\Marcxml\\target.mrc") ;
I get the following error :
Exception in thread main java.lang.Noclassdef foundError: c:Downloads\marcxml\source/xml
could some one tell me if i'm doing the right way in passing the arguments to the batch file if not what is the right way??
Message was edited by:
justunme1

1 - create a java class (Executer.java) for example:
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class Executer {
     public static void main(String[] args) {
          try {
               for (int i = 0; i < args.length; i++) {
                    System.out.println(args);
               Class<?> c = Class.forName(args[0]);
               Class[] argTypes = new Class[] { String[].class };
               Method main = c.getDeclaredMethod("main", argTypes);
               // String[] mainArgs = Arrays.copyOfRange(args, 1, args.length); //JDK 6
               //jdk <6
               String[] mainArgs = new String[args.length - 1];
               for (int i = 0; i < mainArgs.length; i++) {
                    mainArgs[i] = args[i + 1];
               main.invoke(null, (Object) mainArgs);
               // production code should handle these exceptions more gracefully
          } catch (ClassNotFoundException x) {
               x.printStackTrace();
          } catch (NoSuchMethodException x) {
               x.printStackTrace();
          } catch (IllegalAccessException x) {
               x.printStackTrace();
          } catch (InvocationTargetException x) {
               x.printStackTrace();
          } catch (Exception e) {
               e.printStackTrace();
2 - create a .bat file:
@echo off
java -cp C:\Downloads\Marcxml\marc4j.jar; C:\Downloads\Marcxml\marcxml.jar; Executer %TARGET_CLASS% %IN_FILE% %OUT_FILE%3 - use set command to pass variable:
Open MS-DOS, and type the following:
set TARGET_CLASS=MyTargetClass
set IN_FILE=in.txt
set OUT_FILE=out.txt
Then run your .bat file (in the same ms dos window)
Hope that Helps

How to modify an existing xml file from java code.

Hi
I have worked on creating a new xml file from java code using xmlbeans.But if i try to modify an already existing file using java code I am unable to get errorfree xmlfile.
For example if xml file(studlist.xml) is as below:
<?xml version="1.0" encoding="UTF-8"?>
<StudentList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="D:\kchaitanya\xmlprac1\abc\Studlist.xsd">
     <Student>
          <Name>ram</Name>
          <Age>27</Age>
     </Student>
<Student>
          <Name>sham</Name>
          <Age>26</Age>
     </Student>
</StudentList>
Now suppose i have set name to victor using student.setName,
and set age to 20 using setAge from javacode,
the new xml file is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<StudentList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="D:\kchaitanya\xmlprac1\abc\Studlist.xsd">
     <Student>
          <Name>ram</Name>
          <Age>27</Age>
     </Student>
<Student>
          <Name>sham</Name>
          <Age>26</Age>
     </Student>
</StudentList>
<Student>
          <Name>victor</Name>
          <Age>20</Age>
     </Student>
As observed this is not a valid xml file.But how can i modify without any errors?

I know it's an old post, but I found this while doing a google search for something else, and don't like to leave it un-aswered
Just in case anyone has a similar problem... In this case the new elements have been appended outside of the root element
What you need to do is first get the root element and then append the new children to that, there are several ways of getting the root element, which depend on what you want to do with the elements you get back here's a simple (incomplete) way.
// gets the root element of the specified file (code not shown)
Element rootElement= new SAXReader().read(file).getRootElement();Then just append the new elements as below (this is non-generic code and would need to be modified for your situation)
// write a new student element
Element student = document.createElement("Student"); // creates the new student
rootElement.appendChild(student); // ***appends it to the root element***
Element name = document.createElement("Name"); // creates the name element
name.appendChild(document.createTextNode("Fred")); // adds the name text to the name element
student.appendChild(name); // appends the name to the student
Element age= document.createElement("Age"); // creates the age element
age.appendChild(document.createTextNode("26")); // adds the age text to the age element
student.appendChild(age); // appends the name to the studentThen flush ya buffers or whatever and write the file
Edited by: Dream-Scourge on Apr 23, 2008 11:10 AM

How to Generate XML File from Java Code.

I want to generate the xml file from the java code.
Could you plz suggest any webSite address with example?

Here is the code
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class CreateXML {
     private DocumentBuilderFactory factory = null;
     private DocumentBuilder builder = null;
     private Document document = null;
     public CreateXML() {
          try {
               factory = DocumentBuilderFactory.newInstance();
               builder = factory.newDocumentBuilder();
               document = builder.newDocument();
          } catch (FactoryConfigurationError e) {
               e.printStackTrace();
          } catch (ParserConfigurationException e) {
               e.printStackTrace();
     /** Creates the document for xml. */
     public Document createDocument(){
          try{
               Element root = document.createElement("Root");
               Element child = document.createElement("child");
               root.appendChild(child);
               document.appendChild(root);
          }catch(RuntimeException e){
               e.printStackTrace();
          return document;
     /** Saves the document as xml. */
     public void saveDocument(Document document){
          try{
               TransformerFactory transFactory = TransformerFactory.newInstance();
               Transformer transformer = transFactory.newTransformer();
               DOMSource source = new DOMSource(document);
               StreamResult stream = new StreamResult(new File("sample.xml"));
               transformer.transform(source, stream);
               System.out.println("XML Created !!");
          }catch(TransformerConfigurationException e){
               e.printStackTrace();
          } catch (TransformerException e) {
               e.printStackTrace();
     public static void main(String args[]){
          CreateXML createXML = new CreateXML();
          Document document = createXML.createDocument();
          createXML.saveDocument(document);
}

Algorithm / Java Code examples

Similar Messages

Maybe you are looking for