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Hey,
We found the solution. While signing same data multiple times with the same key will produce different signatures.
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Hi All,
I'm getting different signature for same data while signing with the same key multiple times.
Can any one suggest whether it is right?
Thanks in advance.
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syam071 wrote: Can any one suggest whether it is right? What is right, what signing? Please provide sufficient information for people to understand what your problem is, maybe a short extract of the failing code would help.
One of these days I'm going to think of a really clever signature.
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I am coding in Java 6 on a computer with Windows XP.
PrintServiceLookup.lookupPrintServices works fine and returns an array with all printers in my network I have installed.
PrintServiceLookup.lookupMultiDocPrintServices, however returns an empty array and I have seen a couple of other ppl (googled) not getting anything more.
Does anyone know if Java (6) for Windows XP is shipped with support for MultiDocPrintServices?
modified 6-Dec-12 9:20am.
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Hi folks,
I am new to Java and fairly new to programming in general. I have spent a couple of years in MS Access/VB.
In my quest to broaden my skill set I have started to play with Java. Honestly it seems to require a lot of code and classes to do the littlest thing.
My issue is this I have a mysql db with a customer table. I want by combobox to store the id and customer name but only display the customer name in the combobox.
When the user selects a customer I want the id to query the jtable and display the customer info.
I have this working except the part that stores id and name in the combobox.
If someone could provide an example it would be greatly appreciated.
Thanks!
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Here is a nice sample[^] in the Java Tutorials website.
One of these days I'm going to think of a really clever signature.
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I understand the example with animals and the idea of an index (i looked at this from one of your other posts) what I am having hard time grasping is that my index wont be 0-4 it could be a range of ids ie (100,1,201,2304, ect)
So how do I know when the they select pig that it corresponds to id 2304 in my customers list.
Thanks so much for all your help.
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Chrisloys wrote: So how do I know when the they select pig that it corresponds to id 2304 in my customers list. You omitted to mention this in your original post. Are you saying that your users select a customer by using some random number out of a list of hundreds? I would suggest a rethink of your design here. Of course, you could always provide some sort of cross reference between names and numbers; without knowing more about what you are actually trying to do it is difficult to suggest much more.
One of these days I'm going to think of a really clever signature.
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No the numbers are not random per say they are developed by mysql as they are autonumber/primarykey. So if we had two customers with same name they would have two differnt ids. I need to reference this id from the combobox to correctly populate the table.
So my table will look like this
id customername address city
1 customer1 123 this st atown
3 customer2 5 that st btown
4 customer 3 989 overhere st ctown
2 customer 4 9999 overthere st dtown
6 customer 5 234 thisstreet st e town
So when the user selects customer2 from the combobox it will in turn say customer2's id is 3.
3 will then be used to query the customer information and display this in the table.
I hope iam explaining this correctly... this was very common in ms access but all i had todo was hide the column with the id so it only displayed the customer name. When a new customer was selected it would take the hidden id column value to populate a table. It was extremely easy.
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So how does a user find the entry for Smith J. if there is more than one of that name?
One of these days I'm going to think of a really clever signature.
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Well we would then look at the corresponding customer information to make sure we had the correct info. Sorry this really isnt a real life situation as we shouldnt have two customers with the same name.
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I think your question has more to do with your design and how you manage your customer lists, than with how to use a combo box.
One of these days I'm going to think of a really clever signature.
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So how would you design? Very odd this is like DB101. If you had a student table with five students named john smith you identify the difference by there id.
So are you saying that if I want to query a table based on the selection I have to have customer name referenced in other tables??? No that cant be right I look at referential db's most of the day they are linked on ids not names??
Someone out there must have run into this along the way.
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Chrisloys wrote: So how would you design? Well, without spending a lot of time thinking about it I am not sure.
Chrisloys wrote: Someone out there must have run into this along the way. Quite possibly, but I get the feeling this has very little to do with Java.
One of these days I'm going to think of a really clever signature.
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the java part is the jcombobox referencing the id of customer name selected.
If anyone could shed some light it would be most appreciated.
Thanks for all your responses.
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Well looking at the documentation[^] it is clear that the items in the combobox can be objects, so you just need a class of object that contains the name and the id of the customer. The object's ToString() method should return the name which (I guess) will appear in the combo box.
One of these days I'm going to think of a really clever signature.
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pls how do i solve a=1/2bh
v=ut+1/2gt
s=a+(n-1)d using java programming
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What is the issue you are facing ? Did you even try to write any code ? Please share your code (attempt) with us.
Apurv
If Java had true garbage collection, most programs would delete themselves upon execution.
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First you define your variables (a, v, etc), then you write the code to do the calculations. Which part are you having difficulty with?
One of these days I'm going to think of a really clever signature.
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can we in any way extract battery percentage of the laptop in our java program...i am doing this search on net since last week and no results...please help me regarding this problem...
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I do not think you can do it directly in Java. The information is provided by this WMI class[^] of the Windows API. You would need to write some C/C++ code to get the information into a DLL, and use JNI to access that from your Java code.
One of these days I'm going to think of a really clever signature.
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import java.io.Console;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class RegexTestHarness {
public static void main(String[] args){
Console console = System.console();
if (console == null) {
System.err.println("No console.");
System.exit(1);
}
while (true) {
Pattern pattern =
Pattern.compile(console.readLine("%nEnter your regex: "));
Matcher matcher =
pattern.matcher(console.readLine("Enter input string to search: "));
boolean found = false;
while (matcher.find()) {
console.format("I found the text" +
" \"%s\" starting at " +
"index %d and ending at index %d.%n",
matcher.group(),
matcher.start(),
matcher.end());
found = true;
}
if(!found){
console.format("No match found.%n");
}
}
}
}
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I don't know where you got that console hassle there - it's a complete mixup.
Your code works when the console is addressed right:
public class RegexTestHarness {
public static void main(String[] args) {
while (true) {
try {
BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter your regex:");
String strValue = console.readLine();
Pattern pattern = Pattern.compile(strValue);
System.out.println("Enter input string to search:");
String strMatch = console.readLine();
Matcher matcher = pattern.matcher(strMatch);
boolean found = false;
while (matcher.find()) {
System.out.println(String.format("I found the text" + " \"%s\" starting at "
+ "index %d and ending at index %d.",
matcher.group(), matcher.start(), matcher.end()));
found = true;
}
if (!found) {
System.console().format("No match found.");
}
} catch (IOException oException) { oException.printStackTrace();}
}
}
}
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Still a problem Sir, it says: the method console() is undefined for the type System.
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*däng* I missed that one, please change that too:
if (!found) {
System.out.println("No match found.");
}
Do you understand what had to be changed?
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