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Java Essentials

• " :? " operator issue

• Ok guys, here's the deal. I got an exercise from java to write some programs. It's a basic level, so i presume majority of you will respond in no time. Here we go:"Write a program which 'counts' the biggest and smallest number from two given earlier. Use :? operator."So, I tried so many ...
• Tue, 25 Sep 2007 10:04:00 GMT | 2,976 bytes | Answers (11)

• " Every Sub is a Super "

• " Every Sub is a Super "i.e.Super sp=new Super();Sub sb=new Sub();sp=sb; // giving subs reference to super....Thus in case of weaker access sp may nt b able to access the method......
• Wed, 14 Nov 2007 22:07:00 GMT | 222 bytes | Answers (5)

• " how to throw exception inside thread"

• i want to make throws decleration inside the thread but where. Basically i want to throw connection and runtime exception.Where throws decleration will come 1. in the run method2. or in the thread classMy program is giving error in both casesCan i not throw exception inside the threadPlease ...
• Sun, 23 Sep 2007 20:01:00 GMT | 345 bytes | Answers (3)

• " inside a String

• Hello how can I say I want to compare a " character or introduce it inside a String.ie:String t="whatever "still on the String" ";I mean havind the " inside the String definition;...
• Tue, 25 Sep 2007 06:50:00 GMT | 207 bytes | Answers (5)

• " instanceof " problem

• I am working on an employee inheritance problem.Employee is the top class,Labourer extends EmployeeForeman extends LabourerManager extends EmployeeExecutive extend ManagerI am working on the statistics part of the problem and have used the following code to get the total wages of all ...
• Mon, 24 Sep 2007 19:21:00 GMT | 1,636 bytes | Answers (7)

• " strings are immutable "..... is it true ?

• class abc{public static void main(String args[]){String x = "Test";x = x + "Test";System.out.println(x); }}output "TestTest"x has changed ! " strings are immutable "..... is it true ...
• Sat, 22 Sep 2007 17:46:00 GMT | 643 bytes | Answers (17)

• " this " problem

• Hi everyone,I have a problem about this.In the below codes, I have a method called iterator and it reurns an Iterator object.I wonder that when I test this method, whether it copy the " i " object reference or not.And I suppoesed so but when I test it , I saw that it does not copy the reference ...
• Mon, 24 Sep 2007 14:48:00 GMT | 7,182 bytes | Answers (36)

• "#define" in Java?

• Is it possible to use the "#define" in java and/or is there anything that works like it ? (same functionnality or close)d_MASTER_x...
• Sun, 23 Sep 2007 02:19:00 GMT | 144 bytes | Answers (9)

• "<" operator on linux

• hi i have prob.;, i am scared that "<" operator is not supported by java on linux for data import, I have some problem using "<",,,Pls reply ASAP.Thanks.Ankush....
• Mon, 24 Sep 2007 20:51:00 GMT | 201 bytes | Answers (5)

• ")" expected

• I'm using BlueJ to compile, and I'm getting a ")" expected on this line...while(i=0; i < col; i++){everything through the class has matching opening/closing brackets/parentheses.How can I fix this? int i; is declared, so is int col;Message was edited by: ...
• Wed, 14 Nov 2007 12:04:00 GMT | 375 bytes

• "**" to be delimiter not only "*" what can I do?for StringTokenizer

• In my workIf I have an equation, a+b**c+d*e** means exponent. so b^c (but I should do that way **)there are 5different operators > ** + - / *so...I'm trying to use StringTokenizer.such that,StringTokenizer st = new StringTokenizer(String, "*/+-", true)even if I make (String,"*/+-**", true) ...
• Wed, 14 Nov 2007 22:55:00 GMT | 441 bytes | Answers (11)

• ";" expected... is driving me nuts

• I keep getting a compile error, ";" expected.This line should not have a ; in it.Public Static int findPalindrome(String num) {The complete program is below. See line 18.public class NumPalindrome { public static boolean verbose = true; public static void main(String[] argv) { String n = ...
• Mon, 24 Sep 2007 14:08:00 GMT | 3,092 bytes | Answers (3)

• "@" character using FTP

• Ok,I'm currently streaming in data via FTP usingURL ftpCC = new URL("ftp://" + user + ":" + pass + "@" + host + file);but I just found out user account passwords can and will sometimes contain the "@" character. I tested this and it totally re-evaluates the expression and causes a connection ...
• Thu, 15 Nov 2007 06:23:00 GMT | 611 bytes | Answers (4)

• "\n" doesn't work on files?

• I have a String that contains something like this:Hello,\nmy name\nis Manuel.When I do a System.out.println of that string it comes out like this:Hello,my nameis ManuelHowever, when I redirect that to a file it comes out like this (I wrote ?but it comes out as a square):Hello,簃y name篿s ...
• Mon, 24 Sep 2007 18:39:00 GMT | 413 bytes | Answers (4)

• "+" sign in String

• Hello,I have tried to replace a part of string which has "+" sign along with that part. But the system hasnt replaced that part.String str1= "replace word check+this one";String str2 = str1.replaceAll("check+this", "replaced");When I printed str2, the result is stillstr = replace word ...
• Sun, 23 Sep 2007 17:53:00 GMT | 397 bytes | Answers (5)

• "=" problem in query

• my prepared statement is using this SQL query..."select * from myTable where ( time<=? and time=>?) order by time"this query giving is invalid syntax errorb for "=" sign.... if i remove the "=" sign , this works fine.but i want to keep the "=" sign in my query. How ? what should be the ...
• Mon, 24 Sep 2007 14:45:00 GMT | 357 bytes | Answers (9)

• "A reference to an ResourceRef" exception

• hi All,When the Server starts there's a problem with loading the WAR project. the exception is not a critical one and the application runs anyway, but I want to fix it anyway.[16:43:02:808 IST 07/03/05] 16d416d4 WebContainer A SRVE0169I: Loading Web Module: web_root. <-- the WAR ...
• Sun, 23 Sep 2007 07:19:00 GMT | 702 bytes

• "a"+"b"+"c", how many String objects created?

• Hello everyone,String s = "a" + "b" +"c";How many String objects are created?I guess 5, is it right?regards...
• Mon, 24 Sep 2007 16:51:00 GMT | 142 bytes | Answers (1)

• "AA->BB->CC->DD->EE".....need help on this

• String a = "AA->BB->CC->DD->EE";how can i get the last value of the string "EE" in the simplest way?can i use a.split?thanks...
• Sun, 23 Sep 2007 17:41:00 GMT | 164 bytes | Answers (9)

• "Abstract" method in a non-abstract class

• Hi all.I have a class "SuperClass" from which other class are extended... I'd like to "force" some methods (method1(), method2, ...) to be implemented in the inherited classes.I know I can accomplish this just implementing the superclass method body in order to throw an exception when it's ...
• Sat, 22 Sep 2007 23:45:00 GMT | 740 bytes | Answers (19)