How to convert Boolean to booleanI have a Boolean varibale that holds something(I hope) and need to use it in if statement

Ah! I am confused.I am creating a random file name it has to be only 8 characters long.ex)long Input_file = System.currentTimeMillis();Input_file = ? (I need the right most 8 characters.)I tried this ...Input_file = RIGHT(Input_file, 8);But it did not work.Any suggestions will be greatly ...

Hi,I have a problem sending a struct from C to Java UDP server.In the C (client) program, the struct is defined as typedef strurct dataType_s { char name[52]; char add[52]; long x; long y;} dataType;dataType data;strcpy(data.name, "sun");strcpy(data.add, "com");data.x = 100;data.y = ...

what is the easiest way to get the background of a frame tile with a .jpg image ?

Hello!I have such problem :I have a Menu and there are two menuItems. And I need that when I click the first menuItem I would receive one message( for message I use next code :if (command.equals("item1")){Graphics g = getGraphics();g.drawString("title1: " ,100,100);}) End then if I'll click ...

I am experiencing a problem getting the default ListResourceBundle (LRB) to appear when I have the LRB with the _en_US Locale surname. I have four LRBs defined: default, _en_CA, _en_GB, and _en_US. With the _en_US surname another country such as France or Italy still pulls properties from the ...

I'm trying to write a simple ToDo list application, using Java 2 SDK Standard edition 1.3.0_02. Everything works fine until I try to save and open my todo list. It will save okay, but when I open, nothing appears. I suspect that I've missed the Serializable interface.I've made my TaskB ...

Hi Guys,What is the exact meaning of a Java Bean?So far i have come across only one definition on it."It is a resuable software Component".I just don't understand what the heck does this mean.Please tell me what is a bean and where is it exactly used.Are there any resources where i can get ...

Why are EJB's named as such.Basically EJB is used to create web Applications.We aren't using any Beans here?

For some reason the drop down list of the combobox always hide behind anything that overlaps it when you click to bring it down. Anyone know how to bring the drop list of the combobox to the front?Thanks

Hi, Is there a freely downloadable Connection Pool implementation available on the net? I need it specifically for Oracle databases... This is for a prod environment and am looking for a stable implementation... Any good information/links is most appreciated.ThanksProwzen ...

Hi there,I need to have a program that executes diferent commands depending on the input. For example:If the user enters a string containing the filter: id == 1 and age == 30I would like to have in the code:condition = "id == 1 and age == 30"and use the variable condition in a If clause:If ...

Is there a JFM property to specify the working directory?Here's my stupid problem: When I run my application from JBuilder, JBuilder starts the JVM in its directory (say C:\JBuilder35\JDK1.2.2\bin) and not in the directory where my classes are. This means that the "current" directory inside my ...

The code below is a single-column table which serves as a RowHeader column. How do I set the width of the column?I have made a few tries at it without success, as below.import javax.swing.*;import javax.swing.table.*; public class MyRowHeader extends JTable { // DefaultTableColumnModel ...

fopen has modes for opening a file in overwrite mode, or alternatively in append mode. Is there some way to use the Java classes File and FileWriter to do this? I don't see how from the API documentation, or the Java Tutorial on I/O. Here's a code snippet based upon the tutorial (note that no ...

I am trying to use the java.util.Map in developing a genetic algorithm for IF-ELSE statements, i need advice on the best way to carry it out. I don't seem to know how i can accomplish this.

Hi all , I made a simple program using Swing Package, to display Button & text Box. But I can see the output only with Appletviewer , it is giving "class not found" error in any Browser.can any one tell me where I m doing mistake.-Mala

my java application which was compiled successfully last week cannot be compiled this morning, the error messages is following: cannot resolve symbolsymbol: class ###location: class ####compiler cannot find the related classes .......:( could you tell me what 's happening?What am I supposed to ...

hi all ,can anyone tell me how to display swings in the Browser.i can see out put of the program thru appletviewer but there is "class not found" error in the browserregards-Mala

I am trying to declare an array of String Buffers like:<pre>String s = "blah";StringBuffer[] s1 = {null,null,null,null};</pre>but when I actuall try to assign a string to it like:<pre>s1[0].append(s);</pre>I get a null pointer exception ....is there anything wrong with ...

I am trying to declare an array of String Buffers like: String s = "blah";StringBuffer[] s1 = {null,null,null,null}; but when I actuall try to assign a string to it like:s1[0].append(s); I get a null pointer exception ....is there anything wrong with what I am doing or is there any alternate ...

I am trying to declare an array of String Buffers like: String s = "blah";StringBuffer[] s1 = {null,null,null,null}; but when I actuall try to assign a string to it like:s1[0].append(s); I get a null pointer exception ....is there anything wrong with what I am doing or is there any alternate ...

I need to delete a row or insert a row in a JTable without using it's model. The table model for the current JTable extends AbstractTableModel so there are no defined deleteRow or insertRow methods as there are in DefaultTableModel.Basically, I don't know if the JTables models are going to ...

I have this project due tommorow and i can't figure out two errors which is in line 39 identifier expected in the catch statement.I'm posting my codes here i hope u guys can help me! import java.awt.*;import javax.swing.*;import java.awt.event.*;import java.sql.*; class HAddFrame extends ...

Is this at all possible, to add a JPanel containing a JSlider to a TableHeader? If so, what would be the best way of doing this?TIA!

running .....javac Example.javaget....error: cannot read: Example.java1 error here is Example.java.../* simple java programcall this file Example.java*/class Example { // A java program begins with main() public static void main(String args[]) { System.out.println("Java drives the web."); }} ...

How can I get tomorrow's date.Thanks for help

Hi, I just finished downloading and installing Java Web Start 1.0.1 off this page, and have been experiencing some difficulties. Whenever I try to run the program, either on its own or through a link in my browser, it shows me the splash image, and then I get nothing. The program seems to just ...

hi all,I have declared a Vector as this://///////Vector v;aMethod(){ v.addElement(); ......}bMethod(){if (v.isEmpty()){ g.drawString("I am empty!!!",400,270);}else { for(Enumeration e = v.elements(); e.hasMoreElements();){ AClass a =(AClass)e.nextElement(); a.doMethod; ...

My JTable shows at a time about 10 records. But some times it may contain more than 100 records. In that case I have provided search button to find the particular record. So how can I scroll up automatically to this record so that it can be visible in JTable viewport when I do search.Some body ...

I have written a simple "Hello World" program to test out the new IDEs I have installed, and on both of them, I get the same error message:class add not found in class helloworld.HelloWorld at line...I've gone so far as to copy the program, character for character, out of a text book, and I ...

I have been working with JList in display a list of elements in my java applications.Class declaration: public class JobList extends JList implements ListSelectionListener. The deleteJob method shown below can only allow the user to delete one element at a time. How do I implement it so the ...

I have been working with JList in display a list of elements in my java applications. Class declaration: public class JobList extends JList implements ListSelectionListener. The deleteJob method shown below can only allow the user to delete one element at a time. How do Iimplement it so the ...

I on of my webapp, there is a servlet that forward the request to a JSP. Please tell me why<form name="theForm" method="GET" action="thPackage.TheClass"> works while:<form name="theForm" method="POST" action="thPackage.TheClass"> dont. ? ...

i have a custom InstallShield wizard panel that checks to see if the JDK is on the client mahcine - if not it will attempt to install: if (os.startsWith("Windows"))executeCmd(workingDir + fileSep + "3rdParty" + fileSep + "java" + fileSep+ "j2sdk1_3_0-win.exe");else if ...

Hello ,Is it possible to implement a dynamic combobox.I mean, e.g.: A combobox that originally takes on the following values: e.g.: color, function and identityand if you press color, the list changes to contain only colors: e.g.: blue, brown, cyan, ...?Is it possible to reply with an ...

How do I read the entire contents of a java.io.InputStream into a string? I have this so far, but it doesn't work (returns null):byte[] bytesBuffer = null;String soFar = "";int currentChar;int charsReadCount;try{InputStream in = connection.getInputStream();charsReadCount = ...

Is there an easy way to stall my program for like a second? I am accessing the system date from a database computer and for each access I need the date to be unique but right now the program is running too fast and is giving database entries the same time, so I was hoping to just stick in like ...

How best can a parse tree be implemented in java, i have read some online information that suggest use of data structures, but i am still not clear on how to do it.

This error occurs when ran as an applet. It does not occur when I run as an application.And it only occurs for 1 class. The same source is used for other classes and works corrently.I've been searching the class in question and the classes accessed and I can see no problems.Any help would be ...

hi,I m trying something with JTextArea, it is extending the height of JTextArea as I m writing Data in it, I controlled automatic extension of width using : jta.setLineWrap(true);can anyone explain me how fix height of JTextArea.regards-Mala

hi,I m trying something with JTextArea, it is extending the height of JTextArea as I m writing Data in it, I controlled automatic extension of width using : jta.setLineWrap(true);can anyone explain me how fix height of JTextArea.regards-Mala

I have a controller servlet that brings up a JSP page (from a user's home page) which displays a bean and has "save" as a button. When a user clicks on "save" I want to save the data entered in the form in a database and remain on the same page so that the color coding and saved data will not ...

hi, i've just started learning java 2 and i got stuck at the very start, the error message is "Exception in thread "main" java.lang.NoClassDefFoundError: BigDebtplease help anyone

Hey guys:I wrote a simple little program to validate some HTML files in order to do some research about file i/o. Anyway, I would like my JTextArea to refresh every time I call append. In its current incarnation, it only updates when the query is finished. Try compiling and running the program ...

I want to be able to do this in java, please how can i implement this.+/ \a*/ \bc

I am running java on win 95. I have never had to set a classpath variable to compile and run java programs. I have recently installed J2EE in order to have access to the javax.sql package.Ok, now I have to set the classpath variable so the compiler can find j2ee.jar. After doing so the program ...

Hi...what i'm trying to do is to convert a buffer[8] which is filled with signed decimal values to a String Hex represenation of it.... This is the code i'm doing ../CODE/for(int i = 0; i < 8; i++){String serialStr = "";serialStr = serialStr.concat( Integer.toHexString(hashed_Output) ...

I always got problems while trying to call the constructor of a class inheriting from an other. I have a concrete problem that is, I think, easy to solve, but I dont find the answer. Here is my method that throws an exception:...public void aMethod() throws MyException{doSomething();if ( ...

In a non-multithreaded program, how can you delay (or sleep) execution for a certain amount of time, like 2 seconds?