Store Pixels Values Currently On Screen And Compare Them To Values On The First Frame?

Aug 29, 2014

I need a way to store the pixels values currently on the screen and compare them to the values on the first frame. Right now I'm using glreadpixels as follows:

currentBuffer= BufferTools.reserveByteData(mapSize);
glReadPixels(mapStartX, mapStartY, mapWidth, mapHeight, GL_BLUE, GL_UNSIGNED_BYTE, currentBuffer);
for (int i = 0; i < mapSize; i++) {
if (currentBuffer.get(i) != baseBuffer.get(i)) {
//Do nothing
continue;
}
//Do something
}

This works perfectly fine but turns out to be a real bottleneck, dropping the fps to a third of what it was. Is there any quicker way? All I'm after is speed, I don't even need to show it on the screen if the comparison is made "behind the scene".

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Compare Int With Array Of Values

Dec 24, 2014

I need to compare an int with an array of values generated with a for loop previously. I have something like that for the search..

for( int i = 0; i < 5; i++){
System.out.print("Indovina.. inserisci un valore: ");
// I memorize the value taken input
n = sc.nextInt();

[Code] ....

Also, I need to print the array each time I insert a value that is in the array. But, hiding the values still not "guessed".

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How To Compare Two Char Type Values?

Feb 8, 2015

how can i compare two char type variables, ignoring the Case?

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How To Pass Values To A New Frame

Nov 28, 2014

I'm new to Java and I'm trying to pass several values from one frame to another. I've searched around and most codes I've come across are from auto generated GUI code. This what I've been trying to do

Frame1

private class SubmitButtonListener implements ActionListener {
public void actionPerformed (ActionEvent e) {
Frame2 f2 = new Frame2();
//call setValue from Frame2
f2.setValue(4.0);
f2.setVisible(true);
}
}

Frame2

private double val;
public double getvalue()
{
return val;
}
public void setValue(double v)

[code]...

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Can't Retrieve Jtext Field Values From Another Frame

Mar 25, 2014

I am trying to retrieve jtext fields and combo box values from another frame and to put them in database but .getText() doesn't return anything ...

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try{
String sql = "select * from login where uid = ? and pass = ?";
pst = con.prepareStatement(sql);
pst.setString(1, jTextField1.getText());
pst.setString(2, jTextField2.getText());
rs = pst.executeQuery();
if(rs.next()){

[Code] .....

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How To Get Pixel Values Of Image And Store It Into Array

Nov 13, 2014

So i wanted to try something new like find an image within an image. So for my "find" method I would like to take an image and use it to scan and compare sum of absolute differences with the bigger image. So that the smallest SAD would be the exact image that I am using to scan. What I am thinking is to put each pixel value of both images into two separate arrays and compare them via Math.abs(image1[i][j]-image2[i][j]); . My only problem is that I do not know how to put each pixel value into an array.

Also, If I only want to compare just the green in the picture. I saw that the Pixel class has a getGreen(); method. If I want to find the SAD of the green, would Math.abs(image1.getGreen()-image2.getGreen()); work? I was planning to have 2 nested loops running through each column and row for each image and just find the SAD of the green value.

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Store Celsius And Fahrenheit Values Equal To One Another Using Loop

Sep 29, 2014

Write java program using table that stores celsius and farenheit values that are equal to one another using a loop. use C 0-20 and convert to farenheit.

I have to use doubles for Celsius and Fahrenheit and in the formula. I get a runtime error with the following displayed:

I will display a table of temperatures in their Celsius and Farenheit equivalents.

celsiusfarenheit

import java.util.*;
import java.lang.*;
import java.io.*;
class TemperatureConversion {
public static void main (String[] args) throws java.lang.Exception {
double celsius;// Temperature in degrees Celsius minimum
double farenheit;// Temperature in degrees Fahrenheit

[Code] ....

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Servlets :: How To Send Multiple Values Of Same ID But Different Values Of HTML

Feb 27, 2015

I have a question in mind that this is my registration form. I am sending these values from HTML form to server and database. I have question that in my case if I click next to Add Another Mobile no in HTML.then a block is genereated and each time a new name is generated.

My Question is if I click 6 times then 6 name attribute are generated. How can I send and differentiate them on my server side.

Because at their I will use something request.getAttribute("Attr_Name");

But they are same. How to do this?.

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Instead Of Different Values In Two Columns Per Row In Jtable Getting Same Values

Feb 5, 2014

I have a JScrollPane with two coulmns. In the first column I have an image pane JTable, and in the second a list with names of sections. This second column I try to divide in two columns, one (the second column) to display the names of the sections (each row contains one name), and in the other column (the third) I want to show some values for every section in the row respectively. But, instead of displaying the desired values in the third column, I get the same names of the sections as in the second column.

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Size Of Frame In Gaming Code - Full Screen Mode

Feb 17, 2014

Basically the code is for a game which is displayed in a window. The statement if(false) //full screen mode is confusing me a little. How does this if work? it doesn't seem to be testing for anything so how does it ever get set to full screen mode? Is the if even needed? why not just code windowed mode?

public class Window extends JFrame{
private Window()
{
// Sets the title for this frame.
this.setTitle("My test");
// Sets size of the frame.
if(false) // Full screen mode

[Code] .....

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Passing Values To Two Classes And Retrieving Values From Those Classes

Feb 14, 2015

I'm doing an aggregation exercise that's suppose to find the volume and surface area of a cylinder. What I'm trying to do is pass values from one class, to a second class, and that second class passes values to a third class.

This may be a clearer explanation: The first class is the main program which sends values to the second and third class. The second class is used do calculations for a circle (a pre-existing class from another assignment). The third class grabs the values that the second class calculated and calculates those values with the one that was passed from the first class to the third class. The first class then prints the outcome.

Problem is when the program gets to the third class, it just calculates the value from the first class with the default constructor from the second class. It's like the second class never received the values from the first class. I think I'm missing a step, but I don't what it is.

First Class:

package circle;
import java.util.Scanner;
public class CylinderInput
{
static Scanner in = new Scanner(System.in);
public static void main(String[] args)
{
//user defined variable

[Code]...

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Duplicate Values Add To Set?

Aug 22, 2014

give code snipt how can achieve to duplicate values add/allow to Set.

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How To Print First 5 Values

Nov 16, 2014

See the below:

public static void main() {
int i; // counter
  createDeck(); // this is a function call
  // Show the cards in the deck
System.out.println("The deck is as follows:");
for (i=0 ; i < CARDS_IN_DECK ; i++)

[code]....

It is now printing out the value of myDeck[5] but I need to print out first 5 values.

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Getting ID Of Column Values From Db?

Jun 9, 2014

how can i get id from db table for each column values with java or oracle query? i did get before each column content from file and now i need get the id of this column values from db. I read csv files from folder and then load the data from these files into subfolder, and here with line li = line.split(","); i get the values that i have in csv file and split them and become in li the value name, and then in else block i create a P objekt where i set this values from csv files, and with [I]p.setLid(li);

I set the value for all valuenames, and then get these valuenames in separate column with other content from this csv, and my question is, i need to do this with db, and write these csv file values to the table in db (it will be done with another java class), what i need, that to write the ids of these values into the table in db, instead of valuename, and while there is no ids for valuenames in csv files, i need to get the id from the table in db where these are already listed with sequences.

I don't know how can i write in data table the id of this valuenames and other content, this data table should contain the ids of valuenames timestamp values and the ids of the csv files name, i don't know how to do this with the ids, i must get the ids from the db table and then set these on [I]p.setLid(li); where i set early the valuenames, instead of valuenames i should set ids, that will set ids automatically for all these valuenames.

try {
while ((line = br.readLine()) != null) {
if (lc == 0) {
li = line.split(",");
} else {
 String[] temp = line.split(",");
for (int i = 1; i < temp.length; i++) {
p = new P();

[code]....

i got the values that then will be given to [I]p.setLid(li); and iterate, but now i want to get id from the table in db where this values stored with id instead of this column values, how can i do it?

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Trying To Add Values Under Different If Statements

May 1, 2014

My initial question had to do with looping but now I'm having trouble adding certain variables.

The original thread is here: [URL] ....

If you look at the end of the code it won't recognize the "overtime" and "hourDiff". I have to use it for each level the
user chooses and am not sure how to do so. Even if I put it under the if{ statement it won't calculate. I assume it's due to it being cut off from other blocks but I'm not sure how to combine them.

My code is:

import javax.swing.JOptionPane;
public class Pay {
public static void main(String[] args) {
double salary2 = 20.00;
double salary3 = 22.00;

[Code] ....

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How To Add All The Button Values

Mar 19, 2014

public void actionPerformed(ActionEvent ae){
float A=0; 
int a = Integer.parseInt(tf1.getText());
if(ae.getSource()==b2) {
A=(((30*a*14) / 100)+(30*a));

[Code] .....

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Cardlayout Format - Change Main Menu Screen Into Game Screen On Button Click

Mar 16, 2015

I'm making a game of checkers for my A2 Computing coursework which is due in within a week. I have completely finished the game, and only thing I have left to do is connect the two JPanels together via a CardLayout that I have made. However I am unsure how to do so

Here is the code from my CardLayout:

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JButton;

[Code] ....

I have kept the code I am displaying to a minimal, hence I have removed all the action listeners for my buttons, anyway the problem I have is that, I would like it so that when the user clicks on the 'Multiplayer' button which is the array button ourButtons[1], it will then transition into my main game screen so that the user can then play a game of checkers.

Here is the main important GUI from my CheckerBoard class:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
  public class CheckerBoard extends JPanel implements ActionListener, MouseListener {
// Main routine that opens an Applet that shows a CheckerBoard
public static void main(String[] args) {
new CLayout();
 
[Code] ....

Once again kept to a minimal.

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Returning Values From Table?

Apr 6, 2015

This simple program should build a new table with random values and on the getValue method (perhaps called from othe TestClass) return back content of particular cell. why my getValue method doesn't work. Nay! It returns error while compilation.

import java.util.Random;
class TablicaIntowa{
public int getValue(int a){
return tabl[a];
} //getValue method end

[Code]....

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Returning Values From Arrays

Nov 22, 2014

I have created a class and a matrix of doubles (or at least, I think I have, that's partly what I want to verify).I need to return the values of the array,Here is my class:

public class example{
double[][] Position=new double[2][11];
double calculate(){
for (int time=0;time<=10;time=time+1){
Position[1][time]=time;
Position[2][time]=time+1;
double A=Position[2][time];
return A;
}
}
}

I am getting the error: "This method must return a result of type double", though to me it looks like I am returning double (A).

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JSP :: Update Database Values?

Jan 4, 2015

I am trying out jsp and servlets now for the first time. I have to insert two data, car code and car name into a mysql table. I got those details using jsp but if I use form, it redirects to another page for insertion. I want the data to be inserted and still remain in same jsp page. I am thinking of using onClick from javascript but as I googled this many places have said it is a bad idea to use jsp inside javascript. If so how can we insert data to mysql table without redirecting to another page?

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Storing Out Of Range Values?

Aug 6, 2014

I am storing out of range values in int and byte type

public class OverflowDemo {
public static void main(String args[]) {
int value = 2147483647 + 10;
System.out.println(value);
byte b=127+10;
System.out.println(b);
}
}

Program will give error for only byte type as OverflowDemo.java:8: error: possible loss of precision

byte b=127+1; ^
required: byte
found: int

So why not for Integer?

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Can't Get Negative Values Working

Nov 11, 2014

when i input a positive integer it works but when i input a negative number it doesn't work

my pseudo code:

READ input
WHILE( NOT CORRECT INPUT)
READ INPUT AGAIN;
ENDWHILE
DECLARE array arr[input]
FOR(i=0 to input-1)
arr[i]= Random number from 0 to 100;
ENDFOR
DISPLAY ARRAY

error message when i input -5 : Exception in thread "main" java.lang.NegativeArraySizeException atPosNeg.main<PosNeg.java:36>
 
import java.util.*;
class PosNeg{
 public static void main(String args[]) {
  Random generator = new Random();
Scanner scan = new Scanner(System.in);

[code]....

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JSP :: How To Bind Values From HTML

Aug 11, 2014

I am creating a search module page. It has many input ext field and a search button.

On my jsp, I have the following:

<label>Reference ID:
<input id="referenceID"
name="referenceID"
type="text"
value="<c:out value="${transaction.refId}" />"/>
</label>

On my servlet, I have the following (code fragment):

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Transaction transaction = new Transaction();
transaction.setRefId(request.getParameter("referenceID")== null || request.getParameter("referenceID")== "" ?null:Long.parseLong(request.getParameter("referenceID")));
request.setAttribute("transaction ", transaction );
}

Is there any alternative on executing request.getParameter on the id's of input text in order to set it on the Transaction bean so that the values will display on the user when the page reloads?

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How To Visualize Values Of The Selected Row

Nov 30, 2014

I'm currently writing a small program, where I need to save data into a Defaulttablemodel in a jTable.I have to save the name, a number and the email-adress.I added a button which opens a new JFrame and there I need to change the email and/or the name.My current solution is far from good: No matter which row I select, i can only update the "newest" row (last created). How can I visualize the values of the selected row (out.println// or whatever) so I can go further and overwrite these values.My Code when I click on Update:

int zeilenwahl = jTableStudenttab.getSelectedRow();
// System.out.println(jTableStudenttab.getSelectedRow());
if (zeilenwahl != -1) {
this.setVisible(false);
new Bearbeitung().setVisible(true);
} else {
JOptionPane.showMessageDialog(rootPane, "Zum Bearbeiten Zeile auswählen");
}

Here is where the mistake is (probably)

public Bearbeitung() {

initComponents();
jTextFieldvorname.setText(Student.vorname);
jTextFieldnachname.setText(Student.nachname);
matrikelstring = matrikelstring.valueOf(Student.matrikelnummer);
jLabelmatrikelwert.setText(matrikelstring);
jTextFieldemail.setText(Student.email);

}

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JSP :: Attributes With Values In Different Scopes

Mar 19, 2014

We can have attributes in different scopes in a JSP page. Suppose there is an attribute named 'name' with values in different scopes as below:

request - A
session - B
application - C
page - D

Suppose I print ${name} in a JSP page, then what will be the value printed on the JSP? And, what will be the preference order of attributes search in different scopes?

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Adding Values Within Jtextfield?

Mar 25, 2015

I have a supermarket checkout line where i have a list of available products on the left and then a basket on the right with the products in. The products are listed in an array, here is the product class

public class Product {
private String name;
private double weight;
private double price;

[Code] ....

with getters and setters excluded, and the list these are put into

public class productList extends DefaultListModel {
public productList (){
super();
}
public void addProduct (String name, double weight, double price, int code){
super.addElement(new Product(name, weight, price, code));

i have the price for each product to be displayed in a text field with the following code

addBasketItem = new JButton();
getContentPane().add(addBasketItem);
addBasketItem.setText("Add >");

[Code] ....

defaultCheckoutList contains my available items and defaultMainList is the basket, with mainTillPrice being the jtextfield.

This works to get the price however it just replaces each time i make a new entry with the price for the next item, i want a total of the price of all the items i have added, but not sure how.

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