A Simple Java Editor

Hello,
I am looking for a very simple(barebone)Java editor which can provide syntax highlighting facility. I need to plug it into my application.
Can anybody suggest me something?
Looking forward 2 ur replies.

Hi,
one of the most powerful editor in Java is jEdit.
But it is not only a powerful editor you can also get its editor bean with
syntax highlighting separately from http://syntax.jedit.org/.
So you can have both: An editor to use and a component to integrate into your apps.
Bye
Frank

Similar Messages

In search of simple java editor

Hello,
I'm currenty searching for a java component that can display images.
Preferably it has:
- zooming capabilities
- pluggable commands
I have allready tried using DisplayJAI in combination with imagefilters. The only thing missing is a simple zooming (currently, I have quality loss when zooming in and out succesively).
Does anyone know of a simple imagewidget that has these capabilities (preferably open-source)?

You could just extend JComponent and make your own class...

Trying to find simple OSX Java Editor

Hi,
This is my first posting ... hope it's the right place. I'm new to Java - enjoying it greatly. Started on PC using JCreator as Java editor ... fast, simple to use & understanderable, get on with the job of learning ... no problem.
Now I have to migrate to mac OSX and I'm getting into trouble. JCreator is not available for OSX and all I can find are IDE's that I'm finding way too complex, fiddley and with WAY too much 'bling' for me right now. I'd be REALLY greatefull for any pointers to good, simple MAC editors.
Thanks in advance
Giles

OK, I'm working my way through 'The Java Tutorial' - obviously download examples, open JCreator and can immediatly compile & run them, it dosn't change the example in any way NetBeans, by comparison seems to want me to set up a project, it adds a whole load of stuff that I don't understand yet.

Efficient data structure to implement simple text editor?

I was given this problem in an interview:
What data structure would you use to implement a simple text editor that does these 4 functions:
a) goto(line number)
b) insert(char input,location)
c) delete(location)
d) printAll() //print entire file
Given that i'm such a newb, i was stumped. I came up with making a 2d array that would allow for o(1) time for goto, but o(n) for everything else (shifting everything in the array). there were other downfalls too dealing with space issues and such, but he wanted me to optimize this data structure. I then came up with a linked list of arrays, but that had similar problems.
But thinking about it further is driving me a little crazy so I'm wondering if you guys have any suggestions on how to answer this question...
one thing that came to mind after is to implement the data structure as a binary tree, where each node contains
class Node
char theChar
int position; // ie 0 = first character in the file, and 81 could be the first character in the 2nd line
node left,right,parent;
}so how it works is the cursor would know where the location was so i would know where to delete and insert within the tree.
insert {
     //search for location to insert after (log n)
       //create new character node and append to current node
     //increment position for all subsequent children
delete(x) {
     search for x position
     if found, remove node and decrement position value for all children
goto(line #) {
     return line # * 80 (or whatever max length for a single line)
}the major problem i see here is balancing the tree after every insert/delete
Thanks in advance.

One of many great things emacs has given us is the gap buffer:
http://en.wikipedia.org/wiki/Gap_buffer
To see a Java implementation of this you can look in the Java SDK source. The document model (I forget exactly what its called), used in Swing uses a gap buffer.

Simple XML Editor

Is there a simple, FREE, XML editor out there (written in Java)?
I am using an XML file format for a small application I wrote, and I would prefer to edit the file using an XML editor, since it is easy to screw up the file in a text editor.
If you've used Forte or Netbeans, all I want is a simple XML editor like the one that is built into the IDE.
Thanks for any information.

Vim works pretty good, its free, and has syntax highlighting. You would need to be familiar with using vi. http://www.vim.org/
If you use Eclipse, you can get http://www.oxygenxml.com/. It's not free, but its cheaper than XMLSpy.
I haven't found anything better than XMLSpy, even though its expensive.
Does anyone know of another tool that can generate a sample instance document from a schema, and/or a schema from an instance document? I find that handy in XMLSpy.
-Scott
http://www.swiftradius.com

How can I add highlighting to my simple text editor?

Hi ...I wrote a simple text editor ..but I want to add Sysntax highlihting to my editor ...ilke I will enter some words in sourse code (new..import.. ext ) and when I write in text those words I want to see whit a different collor ..how can I do this? here is source codes for my text editor..and I want your help
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.plaf.ComponentUI;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;
import java.util.regex.*;
public class JText extends JFrame{
     private JTextArea textarea ;
     private JFileChooser fileChooser = new JFileChooser();
private Action open =new OpenAction() ;
private Action save = new SaveAction();
private Action exit = new ExitAction();
public static void main(String args[])
          JText pencere= new JText();
          pencere.setBackground(Color.lightGray);
          pencere.setSize(400,300);
          pencere.setVisible(true);
     //Text Area
     public JText(){
     textarea = new JTextArea(15,90) ;
     JScrollPane scroll = new JScrollPane(textarea);
     JPanel content = new JPanel();
content.setLayout(new BorderLayout());
content.add(scroll, BorderLayout.CENTER);
     //Menu Bar
JMenuBar menu=new JMenuBar();
JMenu file=menu.add(new JMenu("FILE"));
file.setMnemonic('F');
file.add(open);
file.add(save);
file.addSeparator();
file.add(exit);
setContentPane(content);
setJMenuBar(menu);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("Project");
pack();
setLocationRelativeTo(null);
setVisible(true);
     class OpenAction extends AbstractAction {
     //============================================= constructor
     public OpenAction() {
     super("Open...");
     putValue(MNEMONIC_KEY, new Integer('O'));
     //========================================= actionPerformed
     public void actionPerformed(ActionEvent e) {
     int retval = fileChooser.showOpenDialog(JText.this);
     if (retval == JFileChooser.APPROVE_OPTION) {
     File f = fileChooser.getSelectedFile();
     try {
     FileReader reader = new FileReader(f);
     textarea.read(reader, ""); // Use TextComponent read
     } catch (IOException ioex) {
     System.out.println(e);
     System.exit(1);
          class SaveAction extends AbstractAction {
          //============================================= constructor
          SaveAction() {
          super("Save...");
          putValue(MNEMONIC_KEY, new Integer('S'));
          //========================================= actionPerformed
          public void actionPerformed(ActionEvent e) {
          int retval = fileChooser.showSaveDialog(JText.this);
          if (retval == JFileChooser.APPROVE_OPTION) {
          File f = fileChooser.getSelectedFile();
          try {
          FileWriter writer = new FileWriter(f);
          textarea.write(writer); // Use TextComponent write
          } catch (IOException ioex) {
          JOptionPane.showMessageDialog(JText.this, ioex);
          System.exit(1);
               class ExitAction extends AbstractAction {
               //============================================= constructor
               public ExitAction() {
               super("Exit");
               putValue(MNEMONIC_KEY, new Integer('X'));
               //========================================= actionPerformed
               public void actionPerformed(ActionEvent e) {
               System.exit(0);
}

i looked it ...it is the one which i want to do ..But i want to use my window which i gave above ..But i cant mix them ..:( this codes for highlighting.... is any body can add this codes and my codes which i gave above connect together? pleaseeeee... :))
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
public class SyntaxTest extends DefaultStyledDocument
Element rootElement;
String wordSeparators = ",:;.()[]{}+-/*%=!&|~^@? ";
Vector keywords = new Vector();;
SimpleAttributeSet keyword;
public SyntaxTest()
rootElement= this.getDefaultRootElement();
keyword = new SimpleAttributeSet();
StyleConstants.setForeground(keyword, Color.blue);
keywords.add( "abstract" );
keywords.add( "boolean" );
keywords.add( "break" );
keywords.add( "byte" );
keywords.add( "case" );
keywords.add( "catch" );
keywords.add( "char" );
keywords.add( "class" );
keywords.add( "continue" );
keywords.add( "default" );
keywords.add( "do" );
keywords.add( "double" );
keywords.add( "else" );
keywords.add( "extends" );
keywords.add( "false" );
keywords.add( "final" );
keywords.add( "finally" );
keywords.add( "float" );
keywords.add( "for" );
keywords.add( "if" );
keywords.add( "implements" );
keywords.add( "import" );
keywords.add( "instanceof" );
keywords.add( "int" );
keywords.add( "interface" );
keywords.add( "long" );
keywords.add( "native" );
keywords.add( "new" );
keywords.add( "null" );
keywords.add( "package" );
keywords.add( "private" );
keywords.add( "protected" );
keywords.add( "public" );
keywords.add( "return" );
keywords.add( "short" );
keywords.add( "static" );
keywords.add( "super" );
keywords.add( "switch" );
keywords.add( "synchronized" );
keywords.add( "this" );
keywords.add( "throw" );
keywords.add( "throws" );
keywords.add( "true" );
keywords.add( "try" );
keywords.add( "void" );
keywords.add( "volatile" );
keywords.add( "while" );
public void insertString(int offset, String str, AttributeSet a) throws BadLocationException
super.insertString(offset, str, a);
int startOfLine = rootElement.getElement(rootElement.getElementIndex(offset)).getStartOffset();
int endOfLine = rootElement.getElement(rootElement.getElementIndex(offset+str.length())).getEndOffset() -1;
//highlight the changed line
highlightKeyword(this.getText(0,this.getLength()), startOfLine, endOfLine);
public void remove(int offset, int length) throws BadLocationException
super.remove(offset, length);
int startOfLine = rootElement.getElement(rootElement.getElementIndex(offset)).getStartOffset();
int endOfLine = rootElement.getElement(rootElement.getElementIndex(offset+length)).getEndOffset() -1;
//highlight the changed line
highlightKeyword(this.getText(0,this.getLength()), startOfLine, endOfLine);
public void highlightKeyword(String content,int startOffset, int endOffset)
char character;
int tokenEnd;
while (startOffset < endOffset)
tokenEnd = startOffset;
//find next wordSeparator
while(tokenEnd < endOffset)
character = content.charAt(tokenEnd);
if(wordSeparators.indexOf(character) > -1)
break;
else
tokenEnd++;
//check for keyword
String token = content.substring(startOffset,tokenEnd).trim();
if(keywords.contains(token))
this.setCharacterAttributes(startOffset, token.length(), keyword, true);
startOffset = tokenEnd+1;
public static void main(String[] args)
JFrame f = new JFrame();
JTextPane pane = new JTextPane(new SyntaxTest());
JScrollPane scrollPane = new JScrollPane(pane);
f.setContentPane(scrollPane);
f.setSize(600,400);
f.setVisible(true);
}

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Which is the best java editor for Linux ??
in the Win plataform I'm using the JCreator ... and now I'm migrating to the linux plataform...
please tell me the name of the editor you are using if you use Linux... (Red Hat 7.1 here...)

you can try SciTE from http://www.scintilla.org - it's simple, fast and good enough. you can work with java, c and many other programming languages. There are some features that don't present in any other editor.
Btw SciTE is only editor, not complete IDE. If you wish a full IDE with projects.. etc you can use Borland's JBuilder

Which is the Best Java Editor?

I am a new java programmer? which is best editor to develop enterprise solution?
I heard about Eclipse,NetBeans,JBuilder which is better?
Aravind

When you get a few days/weeks of down time, do a search on this forum for best IDE and read all about everyone's opinions. This question is constantly asked. And then after you've read all the possible arguments for each one and your head is spinning learn to use the command line tools to compile and run while writing code in a simple text editor of your choice.

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Hi,
I am trying to make a java editor in java as my final year engineering project. Can anybody give me some help or a link to any tutorial that might help.
The java editor should include a text editor with all the normal operations such as cut,copy, paste, find etc. I also want that the syntax be highlighted. There must be options for compiling and running of programs.
I would be very grateful for the help..........

Well, for the text editor you can use the Notepad program that comes with JDK. It has all these options, cut, paste, etc.
Then, every "keyword" should be identified and highlighted.
In the compile button, you should make it save your file and run the command javac in a console....it´s really simple since u already have the Notepad to adapt.

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i am novice in jdeveloper and i am reading the book "jdeveloper 10.1.3 handbook". In a hands-on pratice for create a validator i create a java file in code editor, and after I have to click at the bottom the "Class" tab, but I cannot find "Class" tab,instead is "History" .
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thanks

Hi,
I'm not sure this is the "jdeveloper 10.1.3 handbook" you are reading.
The Class editor was removed in JDeveloper 10g.
In this release, you can enter your variable in your Java code, and then select "Generate Assessors...' in the contextual menu.
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See on "Oracle JDeveloper 10g 10.1.3 - Extensions Exchange"
URL: http://www.oracle.com/technology/products/jdev/htdocs/partners/addins/exchange/index.html
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Regards,
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JPanel which uses reflection to create a simple property editor

Hi everyone,
Here's what I'd like: a custom JPanel, let's call it DesiredJPanel, which can be passed an object as an argument, and which then detects all the public getters and setters on that object, and then creates a simple property editor, with default behavior for numbers, booleans, Strings, etc. It might be used like this:
JDialog dialog = new JDialog(new DesiredJPanel(someObjectWithSettersAndGetters)));
dialog.setVisible(true);
Then we'd get a dialog populated with the current values of all relevant properties. The panel could have a button bar, with an ok button. When you press it, all the properties of someObjectWithSettersAndGetters are set according to what the user has entered in the fields of the panel.
This seems like a pervasive, standard use case. It also seems like javabeans is intended for this. E.g. quoting wikipedia: "JavaBeans are reusable software components for Java that can be manipulated visually in a builder tool." Moreover, there is the java.beans.PropertyEditor interface.
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Not exactly what you asked for, but reasonably close. You can use my [Bean Table Model|http://www.camick.com/java/blog.html?name=bean-table-model] to create a JTable which will display all the properties in a single row of a table. The appropriate renderer/editor is used for each property.
Play with the commented out code in JButtonTableModel class to see what you get for your particular bean.

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Is it possible to pass an HTTP request from a simple java class.if yes how?

Is it possible to pass an HTTP request from a simple
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How do I call a simple java class from a bpel process?

Hi.
In JDeveloper 10.1.4.3.0 I've created a simple java class that does an ftp get operation followed by an unzip. The class uses some 3rd part libraries (jars).
I want to use a simple bpel process to schedule a daily execution of this java class, and deploy it all to our SOA-server, - and was looking into using the <bpelx:exec> function.
The java class and the bpel process is all stored in the same JDeveloper project.
How do I put this together so that both my java class and the necessary jars are available to the bpel process?
I've looked into the JavaExecSample.bpel, and it's says something about "...the class com.otn.samples.javaexec.CreditCalculator is locally packaged with this BPEL process".
How do I do that?
Can I make it and test it all locally from my workstation (only JDeveloper installed, I guess there's nothing that can execute the bpel code?), or do I have to compile class etc (make war-file?) and deploy to SOA server (BPEL-INF/lib or classes?) before anything can be tested?
(I guess all this is simple, once you know how, but being a newbie to this I need a shove in the right direction :-)
Regards,
-Haakon-

To create a java class and dependent jars inside the BPEL process project you need to do the following:
1. Right click on your BPEL process project and select New and then Java Class from the Items.
2. Make the BPEL process project, JDeveloper would compile the java classes and add them into the BPEL suite case jar, see the output folder and check the BPEL suite case jar file for java classes and dependent jars.
You can test your Java classes from JDeveloper IDE, no need to deploy the classes on SOA server. When you make the BPEL project it compiles .bpel files and Java classes. You can test your classes once .bpel file and java classes compiled successfully.
Regards,
Dharmendra
http://soa-howto.blogspot.com

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Hello guys,
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I'm leaning on the simple Java DC approach - its easier to create. But I'm just curious on what would be the Pro-side (if there's any) if I use the WD Component interface approach? Is there a plus for the efficiency? (Though I doubt) Or is it just a 'best/recommended practice' approach?
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Regards,
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Hi Jan
>one is to simply write a simple Java DC that does so and just use it as a used DC so I can call the functionality from there
Implemented Java API for the purpose mentioned in your question is the right way, I think. The Java API can be even located in the same WebDynpro DC as your WebDynpro components. There is not strongly necessity to put it into separate Java DC.
>Or create another WD DC that exposes the value (as binary) via component interface
You should not do this because in general WD components' purpose is UI, not API. Implementing WD component without any UI, but with some component interface has very-very restricted use cases. Such WD component shall only be a choice in the cases when the API is WebDynpro based and if you have to strongly use WebDynpro Runtime API in order to implement your own API.
If your API does not require WebDynpro Runtime API invocations or anything else related to WebDynpro then your choice is simple Java API.
>But I'm just curious on what would be the Pro-side (if there's any) if I use the WD Component interface approach? Is there a plus for the efficiency?
No. Performance will be better in simple Java API then in WebDynpro component interface. The reason is the API will not pass thought heavy WebDynpro engine.
BR, Siarhei

Problem while executing simple java program

Hi
while trying to execute a simple java program,i am getting the following exception...
please help me in this
java program :import java.util.*;
import java.util.logging.*;
public class Jump implements Runnable{
    Hashtable activeQueues = new Hashtable();
    String dbURL, dbuser, dbpasswd, loggerDir;
    int idleSleep;
    static Logger logger = Logger.getAnonymousLogger();
    Thread myThread = null;
    JumpQueueManager manager = null;
    private final static String VERSION = "2.92";
      public Jump(String jdbcURL, String user, String pwd, int idleSleep, String logDir) {
        dbURL = jdbcURL;
        dbuser = user;
        dbpasswd = pwd;
        this.idleSleep = idleSleep;
        manager = new JumpQueueManager(dbURL, dbuser, dbpasswd);
        loggerDir = logDir;
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        prepareLogger();
      private void prepareLogger(){
        Handler hndl = new pl.com.sony.utils.SimpleLoggerHandler();
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            filehndl.setEncoding("UTF-8");
            filehndl.setLevel(Level.INFO);
            logger.addHandler(filehndl);
        catch(Exception e){
        logger.setLevel(Level.ALL);
        logger.setUseParentHandlers(false);
        logger.addHandler(hndl);
        logger.setLevel(Level.FINE);
        logger.info("LOGGING FACILITY IS READY !");
      private void processTask(QueueTask task){
        JumpProcessor proc = JumpProcessorGenerator.getProcessor(task);
        if(proc==null){
            logger.severe("Unknown task type: " + task.getType());
            return;
        proc.setJumpThread(myThread);
        proc.setLogger(logger);
        proc.setJumpRef(this);
        task.setProcStart(new java.util.Date());
        setExecution(task, true);
        new Thread(proc).start();
     private void processQueue(){
        //Endles loop for processing tasks from queue
        QueueTask task = null;
        while(true){
                try{
                    //null argument means: take first free, no matters which queue
                    do{
                        task = manager.getTask(activeQueues);
                        if(task!=null)
                            processTask(task);
                    while(task!=null);
                catch(Exception e){
                    logger.severe(e.getMessage());
            logger.fine("-------->Sleeping for " + idleSleep + " minutes...hzzzzzz (Active queues:"+ activeQueues.size()+")");
            try{
                if(!myThread.interrupted())
                    myThread.sleep(60*1000*idleSleep);
            catch(InterruptedException e){
                logger.fine("-------->Wakeing up !!!");
        }//while
    public void setMyThread(Thread t){
        myThread = t;
    /** This method is only used to start Jump as a separate thread this is
     *usefull to allow jump to access its own thread to sleep wait and synchronize
     *If you just start ProcessQueue from main method it is not possible to
     *use methods like Thread.sleep becouse object is not owner of current thread.
    public void run() {
        processQueue();
    /** This is just another facade to hide database access from another classes*/
    public void updateOraTaskStatus(QueueTask task, boolean success){
        try{
            manager.updateOraTaskStatus(task, success);
        catch(Exception e){
            logger.severe("Cannot update status of task table for task:" + task.getID() + "\nReason: " + e.getMessage());
    /** This is facade to JumpQueueManager method with same name to hide
     *existance of database and SQLExceptions from processor classes
     *Processor class calls this method to execute stored proc and it doesn't
     *take care about any SQL related issues including exceptions
    public void executeStoredProc(String proc) throws Exception{
        try{
            manager.executeStoredProc(proc);
        catch(Exception e){
            //logger.severe("Cannot execute stored procedure:"+ proc + "\nReason: " + e.getMessage());
            throw e;
     *This method is only to hide QueueManager object from access from JumpProcessors
     *It handles exceptions and datbase connecting/disconnecting and is called from
     *JumpProceesor thread.
    public void updateTaskStatus(int taskID, int status){
        try{
            manager.updateTaskStatus(taskID, status);
        catch(Exception e){
            logger.severe("Cannot update status of task: " + taskID + " to " + status + "\nReason: " + e.getMessage());
    public java.sql.Connection getDBConnection(){
        try{
            return manager.getNewConnection();
        catch(Exception e){
            logger.severe("Cannot acquire new database connection: " + e.getMessage());
            return null;
    protected synchronized void setExecution(QueueTask task, boolean active){
        if(active){
            activeQueues.put(new Integer(task.getQueueNum()), JumpConstants.TH_STAT_BUSY);
        else{
            activeQueues.remove(new Integer(task.getQueueNum()));
    public static void main(String[] args){
             try{
         System.out.println("The length-->"+args.length);
        System.out.println("It's " + new java.util.Date() + " now, have a good time.");
        if(args.length<5){
            System.out.println("More parameters needed:");
            System.out.println("1 - JDBC strign, 2 - DB User, 3 - DB Password, 4 - sleeping time (minutes), 5 - log file dir");
            return;
        Jump jump = new Jump(args[0], args[1], args[2], Integer.parseInt(args[3]), args[4]);
        Thread t1= new Thread(jump);
        jump.setMyThread(t1);
        t1.start();}
             catch(Exception e){
                  e.printStackTrace();
} The exception i am getting is
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe
Exception in thread "main" ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:820] Please help me.....
Thanks in advance.....sathya

I am not willing to wade through the code, but this portion makes me conjecture your using an Oracle connect string instead of a class name.
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe

A Simple Java Editor

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