DaniWeb IT Discussion Community - Java

Running program as a domain user

kjellih — Fri, 25 Jul 2008 05:53:38 GMT

Hi

I am making a program, and this program is supposed to overwrite a file on a network drive. But I get a FileNotFoundException "filename" (Access Denied), even though I have the authority to do anything on this network drive. Can I provide my program with my password and username and make it "pretend" it's me?

Btw: I don't know if this is relevant information, but I am not prompted for a password or username when accessing the network drive in windows..

How do you save a JPanel as a GIF file?

VernonDozier — Fri, 25 Jul 2008 05:04:36 GMT

I've made a small program that draws black rectangles on a JPanel at random places. I would like to give the user the option to save this JPanel as a .gif file, but I'm not sure where to start. The function I need to write is SaveJPanelAsGIF below on line 36. Can anyone point me in the right direction please? Thanks.

// SaveAsGIF.java



import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;

 

public class SaveAsGIF extends JFrame

{

    ButtonPanel buttonPanel;

    CanvasPanel canvasPanel;

    

    public static void main(String[] args) 

    {

        SaveAsGIF sag = new SaveAsGIF();

    }

    

    

    public SaveAsGIF()

    {

        this.setTitle("Save JPanel As GIF");

        this.setVisible(true);

        this.setSize(600, 600);

        this.setLayout(new BorderLayout());

        canvasPanel = new CanvasPanel(this);

        buttonPanel = new ButtonPanel(this, canvasPanel);

        this.add(buttonPanel, BorderLayout.NORTH);

        buttonPanel.setPreferredSize(new Dimension(600, 100));                

        this.add(buttonPanel, BorderLayout.NORTH);

        this.add(canvasPanel, BorderLayout.SOUTH);

        this.pack();

        this.setDefaultCloseOperation(EXIT_ON_CLOSE);

    }

    

    

    public void SaveJPanelAsGIF (JPanel jp)

    {

        // not sure what to do here.

    }

}

// ButtonPanel.java



import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;





public class ButtonPanel extends JPanel implements ActionListener

{

     JButton drawButton;

     JButton saveButton;

     CanvasPanel cp;

     SaveAsGIF savegif;

     

     public ButtonPanel(SaveAsGIF se, CanvasPanel canPanel)

     {

         savegif = se;

         cp = canPanel;

         this.setBackground(Color.RED);

         this.setPreferredSize(new Dimension(600, 100));

         LayoutManager lm = new GridLayout(1, 2);

         drawButton = new JButton ("Draw New Rectangle");

         saveButton = new JButton ("Save Canvas Panel as GIF");

         drawButton.addActionListener(this);

         saveButton.addActionListener(this);

         this.setLayout(lm);

         this.add(drawButton);

         this.add(saveButton);

     } 



     public void actionPerformed(ActionEvent e) 

     {

         Object obj = e.getSource();

         if (obj == drawButton)

             cp.NewDrawing();

         else if (obj == saveButton)

             savegif.SaveJPanelAsGIF(cp);

     }

}

// CanvasPanel.java



import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;

import java.util.*;





class CanvasPanel extends JPanel

{

    int x;

    int y;

    int length;

    int width;

    Random random;

    SaveAsGIF savegif;

    

    

    public CanvasPanel(SaveAsGIF se)

    {

        savegif = se;

        x = 100;

        y = 100;

        length = 200;

        width = 100;

        random = new Random();

        this.setBackground(Color.GREEN);

        this.setPreferredSize(new Dimension(600, 500));

    }

    



    public void paintComponent(Graphics g)

    {

        super.paintComponent(g);

        g.setColor(Color.BLACK);

        g.fillRect(x, y, width, length);

    }

    

    

    public void NewDrawing()

    {

        x = random.nextInt(100) + 50;

        y = random.nextInt(100) + 50;

        width = random.nextInt(100) + 50;

        length = random.nextInt(100) + 150;

        repaint();

    }   

}

JComboBox problems

jimbobjoe — Fri, 25 Jul 2008 01:56:23 GMT

Hi all. I have this assignment to show a panel to allow users to dynamically alter FlowLayout manager parameters. It doesnt look that pretty, but functionally it is working for the most part. I have most of it up and running, but I simply cannot get the JComboBox working. I have to use this to set the alignment parameter: left, right, or center. How do I go about detecting the selection and then having that alter my settings? Thanks in advance for any help/advice/tips. My code thus far is:

// Exercise28_1: Demonstrate FlowLayout properties

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

import javax.swing.*;

import javax.swing.border.*;



public class Exercise28_1 extends JApplet {

  boolean isStandalone = false;

  JPanel jpComponents = new JPanel();

  JPanel jPanel2 = new JPanel();

  JPanel jpAlignment = new JPanel();

  FlowLayout flowLayout1 = new FlowLayout();

  JLabel jLabel1 = new JLabel();

  JPanel jPanel3 = new JPanel();

  FlowLayout flowLayout2 = new FlowLayout();

  JPanel jPanel4 = new JPanel();

  BorderLayout borderLayout1 = new BorderLayout();

  JComboBox jtfAlignment = new JComboBox(new Object[]

  {"Left", "Center", "Right"});

  FlowLayout flowLayout3 = new FlowLayout();

  JLabel jLabel3 = new JLabel();

  JLabel jLabel4 = new JLabel();

  JPanel jpGaps = new JPanel();

  BorderLayout borderLayout2 = new BorderLayout();

  JTextField jtfHGap = new JTextField();

  JTextField jtfVGap = new JTextField();

  FlowLayout flowLayout4 = new FlowLayout();

  FlowLayout flowLayout5 = new FlowLayout();

  JPanel jPanel5 = new JPanel();

  JPanel jPanel6 = new JPanel();

  FlowLayout flowLayout = new FlowLayout();

  TitledBorder titledBorder1;

  TitledBorder titledBorder2;



  //Construct the applet

  public Exercise28_1() {

    titledBorder1 = new TitledBorder("");

    titledBorder2 = new TitledBorder("");

    this.setSize(new Dimension(400,300));

    jPanel2.setLayout(flowLayout1);

    jLabel1.setText("Alignment");

    jPanel3.setLayout(flowLayout2);

    jpAlignment.setLayout(borderLayout1);

    jPanel4.setLayout(flowLayout3);

    jLabel3.setText("HGap");

    jLabel4.setText("VGap");

    jpGaps.setLayout(borderLayout2);

    jPanel5.setLayout(flowLayout4);

    jPanel6.setLayout(flowLayout5);

    jpComponents.setLayout(flowLayout);



    jtfHGap.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {

        jtfHGap_actionPerformed(e);

      }

    });

    jtfVGap.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {

        jtfVGap_actionPerformed(e);

      }

    });

    jpComponents.setBorder(titledBorder1);

    jPanel2.setBorder(titledBorder2);

    titledBorder1.setTitle("Container of FlowLayout");

    titledBorder2.setTitle("FlowLayout Properties");

    this.getContentPane().add(jpComponents, BorderLayout.CENTER);

    this.getContentPane().add(jPanel2, BorderLayout.SOUTH);

    jPanel2.add(jpAlignment, null);

    jpAlignment.add(jPanel3, BorderLayout.WEST);

    jPanel3.add(jLabel1, null);

    jpAlignment.add(jPanel4, BorderLayout.CENTER);

    jPanel4.add(jtfAlignment, null);

    jPanel2.add(jpGaps, null);

    jpGaps.add(jPanel5, BorderLayout.WEST);

    jPanel5.add(jLabel3, null);

    jPanel5.add(jLabel4, null);

    jpGaps.add(jPanel6, BorderLayout.CENTER);

    jPanel6.add(jtfHGap, null);

    jPanel6.add(jtfVGap, null);



    // Add 15 buttons to jpComponents

    for (int i = 0; i < 15; i++)

      jpComponents.add(new JButton("Component " + i));

  }



  void jtfHGap_actionPerformed(ActionEvent e) {

    int hgap = new Integer(jtfHGap.getText()).intValue();

    flowLayout.setHgap(hgap);

    jpComponents.revalidate();

  }



  void jtfVGap_actionPerformed(ActionEvent e) {

    int vgap = new Integer(jtfVGap.getText()).intValue();

    flowLayout.setVgap(vgap);

    jpComponents.revalidate();

  }



  public static void main(String[] args) {

    Exercise28_1 applet = new Exercise28_1();

    applet.isStandalone = true;

    JFrame frame = new JFrame();

    //EXIT_ON_CLOSE == 3

    frame.setDefaultCloseOperation(3);

    frame.setTitle("Exercise28_1");

    frame.getContentPane().add(applet, BorderLayout.CENTER);

    applet.init();

    applet.start();

    frame.setSize(400,320);

    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

    frame.setLocation((d.width - frame.getSize().width) / 2,

      (d.height - frame.getSize().height) / 2);

    frame.setVisible(true);

  }

}

need help reading cmyk jpgs

TheBuzzer — Thu, 24 Jul 2008 18:03:04 GMT

ImageIO.read does not work for jpgs in cmyk

trying to find a method to read it been searching on google but found lot of different results. Maybe one of you know a easy method to do this.

multi dimensional arrays

newtechie — Thu, 24 Jul 2008 15:37:08 GMT

i am new to java and i was trying to solve a program,
a) i wanted to print marks scored by 3 students in 3 subjects.
b) i wanted to get the total marks scored by each student and find out the highest total marks scored.
c)I also want to find the highest mark in each subject and by whom.
i have done a coding i was able to get a) done and b) partly done,can anyone help me with the coding so i can complete the problem.

class Exam1
{
public static void main(String args[])
{
int [][]subject= {{1,50,66,55},{2,40,42,48},{3,70,90,68}};

// display subject array//
for(int i=0;i<3;i++)
{
for(int j=0;j<4;j++)
{

System.out.print(subject[i][j] +"\t");
}
System.out.println( " ");

}
//to print total marks//
for(int i=0;i<3;i++)
{
int sum=0;

for(int j=1;j<4;j++)
{
sum= sum+ subject[i][j];

}
System.out.println("total marks of candidate "+ subject[i][0] + "=" + sum);
}

}
}

how to create a simple chatting program in java

g_yan — Thu, 24 Jul 2008 08:35:32 GMT

i am a final year student. My supervisor had asked me for creating one chat program using java. i don't have any idea on how to started it. he asked me for doing a standalone system. please help me solve this problem?

help with e-voting using java

bomber4368 — Thu, 24 Jul 2008 01:24:59 GMT

Hi all,

I am no-voice programmer, who has done Programming in Java as subject based only. I am doing project which consist of extensive java programming. I need to built prototype model of working electronic voting system using Java with security, usability and privacy issues in concern. I need help to develop prototype(simulation).
bomber

jdbc connection w/ config file

wrappingduke — Thu, 24 Jul 2008 00:39:22 GMT

hello,

Attempting to connect HSQL db by calling a config file from a java command line. However, receiving the following error message:

Failed to retrieve connection info for database 'personal': Please set up authentication file 'C:\Documents and Settings\user\sqltool.rc'

Here's a sample of the command:

java -jar \pathto\hsqldb.jar personal /pathto/Export_Data.sql 2>err.txt

The config file, sqltool.rc is setup as follows:

urlid personal

url jdbc:hsqldb:file:pathto/MyDB1;shutdown=true

username sa

password

any help is appreciated.

Please Help Compiling Error

twgood — Wed, 23 Jul 2008 16:28:53 GMT

init:
deps-jar:
Compiling 1 source file to C:\NetBeansProjects\SCHOOL1\JavaApplication31\build\classes
C:\NetBeansProjects\SCHOOL1\JavaApplication31\src\javaapplication31\Inventory3a.java:185: cannot find symbol
symbol : constructor Product(java.lang.String,double,double,double)
location: class javaapplication31.Product
super( dvdTitle, dvdItemNumber, dvdStock, dvdPrice);
1 error
BUILD FAILED (total time: 0 seconds)

package javaapplication31;







import java.util.Arrays;











public class Inventory3a{

      

      

   

        Inventory3a() {    // constructor  

            

            

            

           Product[] dvd =  new Product[4];  

      

            dvd[0] = new Product(685.0,"How to Loose a Guy in 10 days",2003, 4, 19.99 );  

            dvd[1] = new Product(565.0,"Coyote Ugly Ugly",2000, 8, 19.98 );  

            dvd[2] = new Product(785.0,"Legally Blonde",2001, 13, 19.99);  

           dvd[3] = new Product(578.0,"Sweet Home Alabama",2002, 8,18.56); 

           

             double totalInStock = 0.0;

             double totalValue = 0.0; 

            

              for(int i = 0; i < 4; i++) 

              {  

                 

                      

               System.out.println("Item number:  " + dvd[i].getdvdItemNumber());

               System.out.println("Title: " + dvd[i].getdvdTitle());

               System.out.println("Made in: "+ dvd[i].getdvdYear());

               System.out.println("In Stock: " + dvd[i].getdvdStock());  

               System.out.println("The price of each DVD is $" + dvd[i].getdvdPrice());

               System.out.println("The value of the inventory is $" + dvd[i].Calvalue());  

               totalInStock += dvd[i].getdvdStock();

               totalValue += dvd[i].Calvalue();

               System.out.println("Total In Stock:" + totalInStock + 

                       " Total Value:  $" +      totalValue);

              System.out.println("Restock Fee: " + (dvd[i].getdvdStock() * dvd[i].getdvdPrice()) * 0.05);}

              System.out.println(); 

     

        }

     

       public static void main(String args []) {  

     

                 //Sorting strings

      String[ ] titles = {"How to Loose a Guy in 10 days", "Coyote Ugly", "Legally Blonde", "Sweet Home Alabama"};

      Arrays.sort(titles);    //use the built-in sorting routine

      for (int i = 0; i < 4; i++)

         System.out.println(titles[ i ]);

   

   double ReStockFee = 0.05; 

           new Inventory3a();  

     

       } //end method main  

    

}

        class Product

        {

           public double dvdItemNumber; 

           public String dvdTitle;

           public double dvdYear;

           public double dvdStock;

           public double dvdPrice;

           public double totalInStock;

           public double totalValue;

           public double ReStockFee;

           

           // five-argument constructor

           Product(double item,String title,double year, double stock, double price ) 

           {  

               dvdItemNumber  = item;

               dvdTitle = title; 

               dvdYear = year;

               dvdStock = stock;  

               dvdPrice = price;  

                 

           } //end five-argument constructor

           

            // set dvd item number

           public void setdvdItemNumber (double item)

           {

               dvdPrice= item;

           }// end method setdvdItemNumber

           

           

           // return dvd item number

           public double getdvdItemNumber()

           {

               return dvdItemNumber;

           }// end method getdvdItemNumber

           

           // set dvd title

           public void setdvdTitle (String title)

           {

               dvdTitle= title;

           }// end method setdvdTitle

           

           // return dvd title

           public String getdvdTitle()

           {

               return dvdTitle;

           }// end method getdvdTitle

           

            // set dvd year

          // set dvd stock

           public void setdvdYear(double year)

           {

               dvdYear= year;

           

           }// return dvd year

           public double getdvdYear()

           {

               return dvdYear;

           }// end method getdvdYear

           

           // set dvd stock

           public void setdvdStock(double stock)

           {

               dvdStock= stock;

           } // end method getdvdStock

           

           // return dvd stock

           public double getdvdStock()

           {

               return dvdStock;

           }// end method getdvdStock

           

           // set dvd price

           public void setdvdPrice (double price)

           {

               dvdPrice= price;

           }// end method setdvdPrice

           

           

           // return dvd price

           public double getdvdPrice()

           {

               return dvdPrice;

           }// end method getdvdPrice

           

             // set total in stock

           public void settotalInStock (double total)

           {

               totalInStock= total;

           }// end method settotalInStock

           

            // return total in stock

           public double gettotalInStock()

           {

               return totalInStock;

           }// end method gettotalInStock

               

          

               

           // caluclate Inventory

           public double Calvalue() {  

               return dvdPrice * dvdStock;  

           } //end method value  

           

          // calculates Total Value

             public double totalValue(){

                     return dvdPrice * totalInStock;

             } // end method value

           

             

             

          // returns smaller, bigger or equals according to dvdTitle

      public int compareTo(Object o){

          Product other = (Product) o;

          return dvdTitle.compareTo(other.dvdTitle);

 

      }

           

    class Movie extends Product

{

private double reStockingFee;



public Movie(String dvdTitle, double dvdItemNumber, double dvdStock, double dvdPrice, double reStockingFee)

{

super( dvdTitle, dvdItemNumber, dvdStock, dvdPrice);

this.reStockingFee = reStockingFee;

}

        @Override

public double getdvdPrice() //returns the value of the inventory, plus the restocking fee

{

return super.getdvdPrice() + reStockingFee;

}

        @Override

public String toString()

{

return new StringBuffer().append("Price: " + super.getdvdPrice()).append(" With RestockingFee: " + getdvdPrice()).toString();

}



} // end class Movie



     

           

      

   } //end class Product

xml to object and vice versa

JyotiC — Wed, 23 Jul 2008 10:56:17 GMT

Hi,

I have an xml file, corresponding to an xsd. If there some tool, which would take this xml and xsd and give me an object. And also take the object and xsd and give me xml.

I read about couple of tools like JAXB, xstrem and xmlBeans.
The issue i have with them, is they make their own classes, i want to use classes which i have already defined by my object. And it's not similar to the ones they create.

Is there any other tool, which also takes classes and use that for object?

Regards,
Jyoti

java.lang.NoClassDefFoundError: ???

HLA91 — Tue, 22 Jul 2008 20:36:21 GMT

Hi All

I was reading through the swing tutorial at http://java.sun.com/docs/books/tutor...t/compile.html
and i copied and pasted the provided source code for the HelloWorldSwing.java program.
It compiled fine but when i went to run it the following error message was returned

Quote:

java HelloWorldSwing
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldSwing (wrong name: start/HelloWorldSwing)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)

I have no idea what the error means, like i said i copied the source code from the sun site so i thought it would run ok so most likely there is something wrong with my pc.

Does anyone know whats wrong please?

Many thanks

HLA91

calculate squares and cube

ricss_madara — Tue, 22 Jul 2008 15:54:59 GMT

how to write application that calculate squares and cube of the number from 0 to 10 and output in table. the program does not require any input from user?

username@password

tactfulsaint — Tue, 22 Jul 2008 13:29:48 GMT

hello everyone
I still need code snippet help with authentication of username and password on both java and web application..

begginer

nouryn — Tue, 22 Jul 2008 06:56:49 GMT

I Used to be a c++ programmer and now i'm starting to learn java all by my self so i need a help in how to get starting begging with compiler and IDE tools and the basic diffrants between c++ and java
Thanks

java homework help!!

d4n0wnz — Mon, 21 Jul 2008 22:31:57 GMT

heres my code:





import java.util.Scanner;

import java.lang.Integer;  

public class hmwrk4

{



public static void main(String [] args)

{Scanner kbInput = new Scanner(System.in);

System.out.print("number of the element to delete: ");

int numEle = kbInput.nextInt();

Node n8 = new Node(new Integer(8), null);

Node n7 = new Node(new Integer(7), n8);

Node n6 = new Node(new Integer(6), n7);

Node n5 = new Node(new Integer(5), n6);

Node n4 = new Node(new Integer(4), n5);

Node n3 = new Node(new Integer(3), n4);

Node n2 = new Node(new Integer(2), n3);

Node n1 = new Node(new Integer(1), n2);



Node n0 = new Node(new Integer(0), n1);

Node head = new Node(new Integer(0), n0);

Node prev = new Node(null);

Node curr = new Node(new Integer(0),n0);



if(numEle > 8 || numEle < 0)

{System.out.println("error: out of bounds");

 System.exit(0);

}

else if(numEle == 0)

{head = head.getNext();

}

else

{

 

while(curr != null && numEle > curr.getItem())

{prev = curr;   

curr = curr.getNext();

}



if(curr.getNext() == null)

prev.setNext(null); 

else

prev.setNext(curr.getNext());// = curr.getNext();

}

System.out.println("result: ");

curr = head.getNext();

System.out.print(curr.getItem() + " ");



while(curr.getNext() != null)

{curr = curr.getNext();

 System.out.print(curr.getItem() + " ");

}



} // end of main

//end of class 



}



class Node{

private Object item;

private Node next;



public Node(Object newItem){

item = newItem;

next = null;

}



public Node(Object newItem, Node nextNode){

item = newItem;

next = null;

}



public void setItem(Object newItem){

item = newItem;

}



public Object getItem(){

return item;

}



public void setNext(Node nextNode){

next = nextNode;

}

 

public Node getNext(){

return next;

}



 



             }//end of class

The assignment: to delete a user input number of a linked list and printing the result.
My problem:
Error
hmwrk4.java:34: operator > cannot be applied to int,java.lang.Object
while(curr != null && numEle > curr.getItem())