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Java Forum / First Aid / April 2004Array to nice table presentation
Hello all, I am somewhat of a newbiew but learn real fast. I have a Sorted Map and want to parse out the contents into a nice viewable table. My first thought was to create an HTML doc and display it in a JEditorPane. I can't, for the life of me, figure out how to get started. I am able to parse out the contents but am stuck there. I am open to any suggestions. But would prefer something not to complicated and not to have to save a file to the file system. Thanks a lot. > Hello all, I am somewhat of a newbiew but learn real fast. > [quoted text clipped - 9 lines] > > Thanks a lot. Once you have parsed it what data structure is it in? Post it. All you have to do is restructure the data into a 2D array and then use it to spew out a great big string with a few <table><tr><td> type tags thrown in for good measure. john >> Hello all, I am somewhat of a newbiew but learn real fast. >> [quoted text clipped - 16 lines] > > john That makes sense. How do I get it into the JEditorPane? public JEditorPane drawDoc(String type) throws IOException{ Set entrySet; compPane = null; compPane = new JEditorPane(); compPane.setContentType("text/html"); if (type.equals("Nets")) { entrySet = NetMap.getNets().entrySet(); for (Iterator it = entrySet.iterator(); it.hasNext(); ) { Map.Entry entry = (Map.Entry)it.next(); Net net = ((Net)entry.getValue()); //These are the column entries netName = net.toString() isCrit = net.isBCrit(); ... } } } >>> Hello all, I am somewhat of a newbiew but learn real fast. >>> [quoted text clipped - 34 lines] > } } > } Putting it into the JEditorPane is the straightforward bit. (JEditorPane myPane is initialised elsewhere) (mySortedMap is an entity object of your own creation.) String tableString = mySortedMap.getTableHTML(); myPane.setText(tableString); (IS EQUIVALENT TO) myPane.setText(mySortedMap.getTableHTML()); //looks a bit neater John >>>> Hello all, I am somewhat of a newbiew but learn real fast. >>>> [quoted text clipped - 49 lines] > > John I almost get it. Is mySortedMap the same as 'entrySet', or am I creating a new Sorted Map with the column values in it? >>>> Hello all, I am somewhat of a newbiew but learn real fast. >>>> [quoted text clipped - 49 lines] > > John I almost get it. Is mySortedMap the same as 'entrySet', or am I creating a new Sorted Map with the column values in it? Thank you so much for your patients! This is what I have now: if (type.equals("Nets")) { entrySet = NetMap.getNets().entrySet(); for (Iterator it = entrySet.iterator(); it.hasNext(); ) { Map.Entry entry = (Map.Entry)it.next(); Net net = ((Net)entry.getValue()); netString = net.toString() +" - " + net.isBCrit() +" - " + net.getDiffMate() +" - " + net.isBClk() +" - " + net.isBBus() +" - " + net.isBPwr() +" - " + net.isBGnd() +" - " + net.isBSingle() +" - " + net.isBDiff() +" - " + net.isTagged() +" - " + net.getId() + newLine ; System.out.println(netString); } >>>>> Hello all, I am somewhat of a newbiew but learn real fast. >>>>> [quoted text clipped - 87 lines] > System.out.println(netString); > } Forget the "mySortedMap" thing for now. I assume that each time you go round the for loop and print netString you are printing the data for one row. What you need to do is insert HTML instead of all the hyphens. A table looks like this in HTML (2 rows and 5 cols) <table> <tr> <td>data</td> <td>data</td> <td>data</td> <td>data</td> <td>data</td> </tr> <tr> <td>data</td> <td>data</td> <td>data</td> <td>data</td> <td>data</td> </tr> </table> so for each row you want: <td>data</td> <td>data</td> <td>data</td> <td>data</td> <td>data</td> where data is just whatever you are displaying. Then all you need to do is create another string to start with "<table>" and add netString after each trip around the for loop. Once you have finished the for loop add </table>. Finally put this huge string with all the table data into the JEditorPane using setText(). Hey presto. John >>>>>> Hello all, I am somewhat of a newbiew but learn real fast. >>>>>> [quoted text clipped - 133 lines] > > John That's exactly what I just did ( I guess I got it after all). Thanks. However, it is extremely slow. Is there a better way? > That's exactly what I just did ( I guess I got it after all). Thanks. > However, it is extremely slow. Is there a better way? What part is extremely slow? Setting the content of the JTextPane or creating the HTML String? If it is the latter, you that you are using a StringBuffer and not just appending to a String instead.  SignatureKind regards, Christophe Vanfleteren > > That's exactly what I just did ( I guess I got it after all). Thanks. > > However, it is extremely slow. Is there a better way? > > What part is extremely slow? Setting the content of the JTextPane or > creating the HTML String? If it is the latter, you that you are using a > StringBuffer and not just appending to a String instead. AFAIK as of JDK1.4.0 string appending automatically uses a stringbuffer, and there is no-longer a need to manually use a stringbuffer for simple 'one line' appends like: String s = "a" + c + "c"; // or similar Fine if you can be sure of your JDK. Regards Steve >> What part is extremely slow? Setting the content of the JTextPane or >> creating the HTML String? If it is the latter, you that you are using a [quoted text clipped - 6 lines] > > Fine if you can be sure of your JDK. Appending like this has always used a StringBuffer for these constructs IIRC. But it is very unprobable that the OP is using this kind of construct to generate an entire html table. He's probable appending to a String in a loop, and in those cases, you need to use the StringBuffer for sure. Consider String s = "<table>"; for(int i=0;i<1000;i++) { s = s + "<tr><td>a"; } vs StringBuffer sb = new StringBuffer(4000) for(int i=0;i<1000;i++) { a.append("<tr><td>") a.append("a"); } SignatureKind regards, Christophe Vanfleteren > Hello all, I am somewhat of a newbiew but learn real fast. > [quoted text clipped - 9 lines] > > Thanks a lot. If you are open to open source, check out display tag library for a sweet set of tools which should cover all html table needs. Project page is: http://sourceforge.net/projects/displaytag/ Home page is http://displaytag.sourceforge.net/ > I have a Sorted Map and want to parse out the contents into a nice > viewable table. My first thought was to create an HTML doc and display > it in a JEditorPane. That's certainly doable, and you've got a good bit of advice on how to do it. If you're looking for other options, though, it wouldn't be too difficult to display the data in a JTable. The advantage is that the JTable would read data in the native form rather than building and parsing an intermediate file format, and that the data can be more immediately manipulated by the user (e.g., by selecting a set of cells and so forth) for further operations. To do this, look into implementing a TableModel by extending AbstractTableModel. You just need to provide methods to get the data at certain locations, and to report the total number of rows and columns. Signaturewww.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation >I have a Sorted Map and want to parse out the contents into a nice >viewable table. My first thought was to create an HTML doc and display >it in a JEditorPane. I suppose you could, but the code will run faster if you build a JTable. Google to find yourself some tutorials on setting them up. The trickiest thing about them is JTable is single thread. You must do everything on the Swing thread, perhaps using invokeLater. To get started see http://mindprod.com/jgloss/jtable.html -- Canadian Mind Products, Roedy Green. Coaching, problem solving, economical contract programming. See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. > >I have a Sorted Map and want to parse out the contents into a nice > >viewable table. My first thought was to create an HTML doc and display [quoted text clipped - 8 lines] > > To get started see http://mindprod.com/jgloss/jtable.html I got the sun SimpleTableDemo.java program from their web site and filled it with time zones using TimeZone.getTimeZone, and it looks real nice. Better than html I think. > -- > Canadian Mind Products, Roedy Green. > Coaching, problem solving, economical contract programming. > See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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