Comparing elements inside a vector

Hello,
I am having a hard time understanding how to compare elements inside a vector. I have a vector of six strings and I want to compare the first element at index 0 with all other elements at positions 1-5. After that, compare the element at position 1 with elements at positions 2-5 and so on until all elements have been compared against each other.
Can some one please advise me on how to achieve this?
Thank you.

joor_empire wrote:
Thanks for replying. I tried using nested loops, but I keep getting array index out of bound error.Hmmm, then you're doing it wrong.
For more information, you'll have to give us more info, such as your code (please use code tags when posting it though).

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Display elements inside a vector

How do I display the elements inside a vector and place it inside a TextArea in a JFrame?
//start of Itm class
public class Itm
     private String name;
     private int qty;
     private double price;
     public int SetQty (int nQty)
          qty = 0;
          if (nQty>0)
               qty = nQty ;
          return qty;
     public String SetName (String strName)
          name = "";
          name = strName;
          return name;
     public double SetPrice (String name)
          if (name == "6pcs. Chckn McNggts")
               price = 57;
          else if (name == "HB")
               price = 25;
          else if (name == "Big Mac Meal")
               price = 115;
          else if (name == "CHB Meal")
               price = 115;
          else if (name == "RICE")
               price = 11;
          else if (name == "1pc. Chicken Mcdo w/rice")
               price = 57;
          else if (name == "CHB")
               price = 35;
          else if (name == "1pc. Chicken w/Sphtti")
               price = 90;
          else if (name == "BMD Meal")
               price = 50;
          else if (name == "GRAVY")
               price = 8;
          else if (name == "Mc Spghtti")
               price = 35;
          else if (name == "DCHB")
               price = 69;
          else if (name == "1pc. Chickn Mcdo Happy Ml")
               price = 92;
          else if (name == "Mc Spghtti Happy Ml")
               price = 76;
          else if (name == "X-SAUCE")
               price = 8;
          else if (name == "Mc Rice Brgr Beef Sprme")
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          else if (name == "Qrtr Pounder w/cheese")
               price = 85;
          else if (name == "Mc Flurry")
               price = 30;
          else if (name == "Sundae Cup")
               price = 25;
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               price = 8;
          else if (name == "Mc Rice Brgr Chckn Sprme")
               price = 85;
          else if (name == "Big Mac")
               price = 85;
          else if (name == "PIE")
               price = 20;
          else if (name == "Sundae Cone - Vanilla")
               price = 12;
          else if (name == "ICE MIX")
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          else if (name == "Crispy Chicken Fillet")
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//start of Receipt class
import java.util.*;
public class Receipt
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//end of Receipt class

http://forum.java.sun.com/thread.jspa?threadID=5225026&tstart=0
Thanks for double posting butthole!
NO HELP FOR YOU

Compare element in a vector

hi,
I want to compare the float no in a vector e.g. [{0.2},{0.55}];
but I cannot just compare the 2 using x.elementAt(i) becoz this return object so
i do ix.elementAt(i) nstanceOf float but it pops up error,
but I am actually doing object instance of float, I am wondering where it was wrong
for(int i=1;i<x.size(); i++){
if(x.elementAt(i) instanceOf float){
if( x.elementAt(i)< x.elementAt(i-1)){
mean_dist.addElement(x.elementAt(i));
mean_dist.toString();
System.out.println("train data: "+ mean_dist);
anyone can give me idea
many thx

yep, sure thing, when you use Vector.elementAt(index) it returns an Object, not a Float
but... you KNOW its a Float cos thats what you put there! ok?
Vector has to return Object as when the class was written there was no idea what you would use it for and Object is the general class that coveres just about everything..
what you need to do is "cast" to Float, that is saying,
"ok you dont know its a Float, but I do ( I hope) and I want you to deal with it as a Float"
the way you do this is Float gimme=(Float)myVector.elementAt(index);this tell the compiler that you expect a Float and should deal with the return as a Float
the compiler will do its best to use what it gets as a Float, but if it cant (ie if you put something that isnt a Float in myVector at (index)) then it will generate a ClassCastException
you dont HAVE to catch this, but you may if you want

Comparing elements in vector..

hi ,
how to compare elements in 2 vectors(diff size)
pls help
arvin

thks for your help,
for(int i=0;i<=v.size();i++)
if(v.elementAt(i).equals(v2.elementAt(i))
}when i did like this iam getting error
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Hi,
i have a JComboBox containing list of Strings
so lets say:
String[] test = {"omega", "alpha", "beta", "Arc"}
JComboBox testing = new JComboBox(test);
now is there a way to sort the elements inside the JComboBox once they have been inserted ? or anyone know how to sort the elements before putting them in inside JComboBox ?
the sample code was just for testing and I am dealing with MANY elements (at least 10) inside the JComboBox
thanks in advance
if you have any links that helps with this topic, I will also appreciate it

<hmm>
1) Check out the [url http://java.sun.com/docs/books/tutorial/collections/index.html]Collections API
2) Note that using a java.util.Vector, (which combo box accepts in its constructor), allows you to do
one of two things:
............If you are using a custom object, have it implement Comparable
............If you are using flat Strings, never mind...
Then calling java.util.Collections.sort(myVector) would do this for you. NOTE: by not implementing
Comparable, this may have undesirable results....
A number of collection objects sort by default when you add an element.....

Can not find individual element in the Vector

Hi everyone,
I have employeeRecord class .
I have employee Vector.
I have created two employeeRecord and added them to my employee Vector.
I am trying to test my employee Vector by using lgName = "rez704" .
However I do not see any result.
I was expecting the for loop to go through my employee Vector and
find the login name which matches with my test variable lgName.
ANy clues?
many thanks
Vector employeeVector = new Vector();
Enumeration e = empVector.elements();
String nameLog = "rea700";
String fName   = "ameri";
String passW   = "765";
employeeRecord emp = new employeeRecord(nameLog, fName, passW);
empolyeeVector.addElement(emp);
String nameLog2 = "rez704";
String fName2   = "Xamre";
String passW2   = "kv281"
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String lgName = "rez704";
int i = 0;
for(Enumeration e1 = employeeVector.elements() ; e1.hasMoreElements() ;)
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Hi everyone,
I have employeeRecord class .
I have employee Vector.
I have created two employeeRecord and added them to
my employee Vector.
I am trying to test my employee Vector by using
lgName = "rez704" .
However I do not see any result.
I was expecting the for loop to go through my
employee Vector and
find the login name which matches with my test
variable lgName.
ANy clues?
many thanks
Vector employeeVector = new Vector();
Enumeration e = empVector.elements();
String nameLog = "rea700";
String fName   = "ameri";
String passW   = "765";
employeeRecord emp = new employeeRecord(nameLog,
g, fName, passW);
empolyeeVector.addElement(emp);
String nameLog2 = "rez704";
String fName2   = "Xamre";
String passW2   = "kv281"
employeeRecord emp = new employeeRecord(nameLog2,
2, fName2, passW2);
empolyeeVector.addElement(emp);
String lgName = "rez704";
int i = 0;
for(Enumeration e1 = employeeVector.elements() ;
; e1.hasMoreElements() ;)
if
if (lgName.equals(empVector.elementAt(i)))
System.out.println("Login Name
tln("Login Name Found");
e1.nextElement();
Hi Guys,
No, none of the solution works!!
I tired the following just for testing.
int l = 0;
if ( empVector.elementAt(l).equals(e1.nextElement()) )
<
<
<
it only prints the first employee record
Login Name Found
login Name = reza700
Last name = ameri
passWord = 765
in my original question which I had posted, I wanted to compare not the whole Vector object but
only to access loginName whithin the emplyoeeVector and comapare it
with the lgName which is used as testing.
But the example which I had uesed above and it the wrong type of example the wole emplyoee record is found in the emplyoee vector.
any help is appreciated.
thank you again

Sorting a vector where each element is a vector

Hi,
Sorry for the post but I can't seem to get my head around sorting in Java using Comparator.
I've a vector where each element is a vector containing strings, integers and doubles and the first element of each vector is a double.
I need to sort the vector based on this first value of each element which is a vector.
Hope some can help,
Thanks in advance,
Lou

Here is a generic comparator you can use to sort a List. Vector implements the List interface to you can sort the Vector.
import java.util.Comparator;
import java.util.List;
* A comparator to sort Lists of data based on a column within each List
public class ListComparator implements Comparator
    private int column;
    private boolean ascending;
    ListComparator(int column, boolean ascending)
        this.column = column;
        this.ascending = ascending;
    public int compare(Object a, Object b)
        List v1 = (List)a;
        List v2 = (List)b;
        Object o1 = v1.get(column);
        Object o2 = v2.get(column);
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        if (o2 instanceof String && ((String)o2).length() == 0)
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        if (o1 == null) return 1;
        if (o2 == null) return -1;
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            else
                return ((Comparable)o2).compareTo(o1);
        else // Compare as a String
            if (ascending)
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            else
                 return o2.toString().compareTo(o1.toString());
}You invoke the sort by using:
Collections.sort(yourVector, new ListComparator(column, ascending));

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Hi,
I would like to find out all query elements inside my query.
Is there any table which stores all query elements inside my query ?
Thanks
Pratyush

Hi,
Query elements are stored in this follwing table:
SE11
Table name : RSZELTXREF [Directory of query element references]
other query related tables :
Tables used in Queries
RSZELTDIR      Directory of the reporting component elements
RSZELTTXT    Texts of reporting component elements
RSZELTXREF Directory of query element references
RSRREPDIR     Directory of all reports (Query GENUNIID)
RSZCOMPDIR Directory of reporting components
RSZRANGE    Selection specification for an element
RSZSELECT    Selection properties of an element
RSZELTDIR     Directory of the reporting component elements
RSZCOMPIC    Assignment reuseable component <-> InfoCube
RSZELTPRIO   Priorities with element collisions
RSZELTPROP Element properties (settings)
RSZELTATTR Attribute selection per dimension element
RSZCALC        Definition of a formula element
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Hi!
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Thank you telism,
Let me tell you the whole story.
I'm trying to write an application which has to show my image files (set of photos) with a text description. The list of image files placed into the JList. So, when I select a file from the JList it shows me an image (everything is OK).
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Here is my application:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
public class UnitA extends JPanel implements ListSelectionListener {
BasicUnitA Myapplet;
JPanel listPanel, picturePanel;
Vector imageNames1;
JList list1;
JLabel picture1;
JScrollPane listScrollPane1, pictureScrollPane1, TSP1;
JTextArea TA1;
int index;
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Myapplet=parent;
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ResourceBundle imageResource1;
try{
imageResource1 = ResourceBundle.getBundle("imagenames1");
String imageNamesString1 = imageResource1.getString("images");
imageNames1 = parseList(imageNamesString1);
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System.exit(1);
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list1 = new JList(imageNames1);
list1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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BorderFactory.createLoweredBevelBorder(),
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TSP1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_
ALWAYS);
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BorderFactory.createCompoundBorder(
BorderFactory.createLoweredBevelBorder(),
BorderFactory.createEmptyBorder(5,5,5,5)),
BorderFactory.createLineBorder(Color.black)));
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picture1.setIcon(null);
TA1.setText(null);
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(String)imageNames1.elementAt(index));
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picture1.setPreferredSize(new Dimension (newImage1.getIconWidth(),
newImage1.getIconHeight()));
picture1.revalidate();
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String str;
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TA1.setText(TA1.getText()+str);
reader.close();
}catch(IOException evt){};
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while (tokenizer.hasMoreTokens()) {
String image = tokenizer.nextToken();
v.addElement(image);
return v;

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Hi,
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I want to set a container element inside a class to exit a loop.
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I have attached each Vector element to a thread which I later want to kill and remove that element from the Vector.
Thread.join(milliseconds) allows this functionality to let the thread die after n milliseconds.
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Can someone please throw some light on this?
Here the code I have written for this:
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     Thanks a lot.

I'm not sure if what you are trying to accomplish is correctly implemented.
The method join does not kill the thread. It will wait for the specified time for the thread to exit. If you want the thread to run for a specified ammount of time, develop the run method of that thread with that in mind. Do not try to kill it from the outside, but let it terminate itself (gracefull termination).
Now for your question regarding the vector (you should probably be using ArrayList nowadays): I would implement the observer pattern for this job. Make the threads post an event on the interface when they are done, let the main thread register itself with the threads and synchronize the method that handles the events. In that method you can remove the object from your list.
I'm not sure if you want to use thread anyhow, could you tell us what it is that you are trying to accomplish?

Comparing elements inside a vector

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