jtl.zheng's articles:

Items(40) /4 Next >> Last >|

How to make a larger font in J2ME? 0 28 (6/6/2008 4:24:01 AM) comp.lang.java.programmer the MIDP2 have a "SIZE_LARGE" font. but can I make a larger font than that? how can I do that? Thank you very much. ... JTL

Where can I get the source of J2ME, is there one? 2 33 (6/2/2008 2:16:10 PM) comp.lang.java.programmer Where can I get the source of J2ME, is there one? Thank you very much. ... JTL

What do the "Preprocessing" do in J2ME? 0 21 (5/28/2008 9:01:56 AM) comp.lang.java.programmer in the "start a new J2ME" project dialog in eclipseme. There a option in it. What's the purpose of it? ... JTL

How to control the output of the console? 6 45 (5/7/2008 1:05:47 PM) comp.lang.java.programmer like the code: try { System.out.println(1); throw new Exception(); }catch(Exception e) { System.out.println(2); e.printStackTrace(); System.out.println(3); } System.out.println(4); if I... JTL

What does conn.close() do when using datapool? 6 117 (11/10/2007 3:34:59 AM) comp.lang.java.programmer I am using tomcat's datapool + mysql.when I call conn.close() after I finish my job.what does it do exactly?it will get the connection back to tomcat's datapool so the next usercan use it?or destory the connect... JTL

Should I close a connection when using DataBase Pool? 7 104 (11/8/2007 2:09:06 PM) comp.lang.java.programmer database pool means that the conncetion can be used by other user.so when I finish the job, should I callconn.close();after it as the old way?... JTL

What's wrong with this sentence? 7 90 (10/31/2007 8:17:29 AM) comp.lang.java.programmer Hashtable userCart = (Hashtable)session.getAttribute("userCart");I am using EclipseIt get a warning:Type safety: The cast from Object to Hashtable isactually checking against the erased type HashtableHashtable ... JTL

How to save a new data file inside the executable JAR package? 27 105 (9/26/2007 1:32:47 PM) comp.lang.java.programmer How to save a new data file inside the excutable JAR package?if only-- new File("text.dat")it will save the file in the folder where the jar file live in.I want to save the file inside the jar package.Thank you... JTL

How to maximize or revert a java jframe after I has minimized it? 8 186 (8/20/2007 3:16:00 PM) comp.lang.java.programmer In windwos, after I click the minimize button on the jframe, it willdisappear and go into the task bar.how can I make it automaticly revert or maximize to show up after 5seconds.Thank you very much in advance.... JTL

How to add jdom library into my jar file in eclipse 6 460 (7/6/2007 2:38:40 AM) comp.lang.java.programmer I have used jdom in my codesso I must add the jdom library into my jar file to make it runbut I can't find any step to add jdom library in eclipse:File-Export-Java-JAR filehow can I jdom library into my jar fil... JTL

jtl.zheng's replies:

Items(22) /3 Next >> Last >|

How can I reset the text of button every second? 10 31 (9/1/2006 1:54:24 AM) comp.lang.java.programmer I want to set the button's text every second as: 1 -> 2 -> 3 -> 4 ......... my code is: ------------------------------------ public class Ooop { public static void doIt() { JFrame jFrame = new JFrame(); ... jtl.zheng (91)

how can I execute a .jar file in linux 4 31 (10/4/2006 6:15:49 PM) comp.lang.java.programmer I am using Red hat linux and had install the JRE (use command: ./jre-1_5_0-linux-i586-rpm.bin and it has done) but when I click a xxx.jar file,it can't be executed (this file can be executed in windows) how ... jtl.zheng (91)

how to stop a thread when it is waitting a socket? 7 37 (10/9/2006 11:42:45 AM) comp.lang.java.programmer I am using SwingWorker to make a new thread in Swing GUI (someting about SwingWorker http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html ) I use this thraed to run a ServerSocket object when usi... jtl.zheng (91)

how to improve transfering file's efficiency #2 7 30 (11/19/2006 10:23:13 AM) comp.lang.java.programmer I have write program for client to client file transmission but it seems unefficient ,the transmission speed is low and it take too much CPU resource here are the codes(sender's and receiver's) are there some ... jtl.zheng (91)

how to use DES in java? 4 46 (11/29/2006 11:26:20 AM) comp.lang.java.programmer I want to write codes to encrypt file using DES something like: public File encryptDES(File inputFile,String DES_key) the DES_key is 56bits I know nothing about it could you introduce some resources about how... jtl.zheng (91)

Does c++ have an uniform class library? 35 23 (12/1/2006 5:59:53 PM) comp.lang.c++ I have learnt java before and now begin to learn c++ what puzzle me is that seem that different SDKs(c++builder, vs.net, gcc..) has its own class library we know that in java there are only one uniform class l... jtl.zheng (91)

How could I transform java to .exe 8 24 (12/5/2006 11:20:27 AM) comp.lang.java.programmer I want to transform my java program to Windows program(someting like xxx.exe file) and this xxx.exe file can run in Windows that didn't install the JRE how can I transform it? is that any tools to do it? ... jtl.zheng (91)

A question about encrypting file using AES 3 32 (1/8/2007 3:53:25 PM) comp.lang.java.programmer my code is: ----------------------------------------------------- public static boolean enDeCrypt(String keyStr, File fin, File fout) { try { FileInputStream in = new FileInputStream(fin); Fil... jtl.zheng (91)

How to control the output of the console? 6 45 (5/7/2008 1:05:47 PM) comp.lang.java.programmer like the code: try { System.out.println(1); throw new Exception(); }catch(Exception e) { System.out.println(2); e.printStackTrace(); System.out.println(3); } System.out.println(4); if I... jtl.zheng (91)

Where can I get the source of J2ME, is there one? 2 33 (6/2/2008 2:16:10 PM) comp.lang.java.programmer Where can I get the source of J2ME, is there one? Thank you very much. ... jtl.zheng (91)