Display images of cards from a file










1















I need to code my program to randomly select three cards from a deck of cards. The images are in a folder on my desktop. I then display the images of the cards. My program runs fine as far as reading from the file and then randomly picking 3 cards out of the 52. I have the program printing the 3 random cards in the output. But I can not see the images of the cards when the java window opens up on my computer. It displays a small line that just continuously repeats. So I think it is trying to display the cards but I have something wrong somewhere that is keeping the whole card(s) from displaying.
Thanks in advance for your help!



import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class DisplayThreeCards

public static void main(String args)

// File location
File folder = new File("//Users//macuser//Desktop//DeckOfCards");
File fileList;
fileList = folder.listFiles();

// Generate random card. Uses the Math.rand() function.
// The '%' operator is used to make sure the random is between 0-52.
int randomCard = (int) (Math.random() * 1000);
System.out.println(fileList[randomCard % 52].getAbsolutePath());

// Print the filename.
// Card 1
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 2
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 3
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);

try
ImageFrame frame = new ImageFrame(fileList[randomCard % 52].getAbsolutePath());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
catch (Exception E)



// Create a window for the card images to be displayed
class ImageFrame extends JFrame

public ImageFrame(String name)
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

ImageComponent component = new ImageComponent(name);
add(component);


public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 300;


class ImageComponent extends JComponent

private static final long serialVersionUID = 1L;
private Image image;

public ImageComponent(String name)
try
File image2 = new File(name);
image = ImageIO.read(image2);
catch (IOException e)



@Override
public void paintComponent(Graphics g)
if (image == null)

int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this);

g.drawImage(image, 50, 50, this);

for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0)
g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);

















share|improve this question



















  • 1





    there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

    – Sergey Grinev
    Nov 15 '18 at 18:11












  • In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

    – Andrew Thompson
    Nov 15 '18 at 23:40











  • .. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

    – Andrew Thompson
    Nov 15 '18 at 23:42















1















I need to code my program to randomly select three cards from a deck of cards. The images are in a folder on my desktop. I then display the images of the cards. My program runs fine as far as reading from the file and then randomly picking 3 cards out of the 52. I have the program printing the 3 random cards in the output. But I can not see the images of the cards when the java window opens up on my computer. It displays a small line that just continuously repeats. So I think it is trying to display the cards but I have something wrong somewhere that is keeping the whole card(s) from displaying.
Thanks in advance for your help!



import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class DisplayThreeCards

public static void main(String args)

// File location
File folder = new File("//Users//macuser//Desktop//DeckOfCards");
File fileList;
fileList = folder.listFiles();

// Generate random card. Uses the Math.rand() function.
// The '%' operator is used to make sure the random is between 0-52.
int randomCard = (int) (Math.random() * 1000);
System.out.println(fileList[randomCard % 52].getAbsolutePath());

// Print the filename.
// Card 1
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 2
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 3
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);

try
ImageFrame frame = new ImageFrame(fileList[randomCard % 52].getAbsolutePath());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
catch (Exception E)



// Create a window for the card images to be displayed
class ImageFrame extends JFrame

public ImageFrame(String name)
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

ImageComponent component = new ImageComponent(name);
add(component);


public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 300;


class ImageComponent extends JComponent

private static final long serialVersionUID = 1L;
private Image image;

public ImageComponent(String name)
try
File image2 = new File(name);
image = ImageIO.read(image2);
catch (IOException e)



@Override
public void paintComponent(Graphics g)
if (image == null)

int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this);

g.drawImage(image, 50, 50, this);

for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0)
g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);

















share|improve this question



















  • 1





    there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

    – Sergey Grinev
    Nov 15 '18 at 18:11












  • In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

    – Andrew Thompson
    Nov 15 '18 at 23:40











  • .. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

    – Andrew Thompson
    Nov 15 '18 at 23:42













1












1








1








I need to code my program to randomly select three cards from a deck of cards. The images are in a folder on my desktop. I then display the images of the cards. My program runs fine as far as reading from the file and then randomly picking 3 cards out of the 52. I have the program printing the 3 random cards in the output. But I can not see the images of the cards when the java window opens up on my computer. It displays a small line that just continuously repeats. So I think it is trying to display the cards but I have something wrong somewhere that is keeping the whole card(s) from displaying.
Thanks in advance for your help!



import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class DisplayThreeCards

public static void main(String args)

// File location
File folder = new File("//Users//macuser//Desktop//DeckOfCards");
File fileList;
fileList = folder.listFiles();

// Generate random card. Uses the Math.rand() function.
// The '%' operator is used to make sure the random is between 0-52.
int randomCard = (int) (Math.random() * 1000);
System.out.println(fileList[randomCard % 52].getAbsolutePath());

// Print the filename.
// Card 1
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 2
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 3
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);

try
ImageFrame frame = new ImageFrame(fileList[randomCard % 52].getAbsolutePath());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
catch (Exception E)



// Create a window for the card images to be displayed
class ImageFrame extends JFrame

public ImageFrame(String name)
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

ImageComponent component = new ImageComponent(name);
add(component);


public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 300;


class ImageComponent extends JComponent

private static final long serialVersionUID = 1L;
private Image image;

public ImageComponent(String name)
try
File image2 = new File(name);
image = ImageIO.read(image2);
catch (IOException e)



@Override
public void paintComponent(Graphics g)
if (image == null)

int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this);

g.drawImage(image, 50, 50, this);

for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0)
g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);

















share|improve this question
















I need to code my program to randomly select three cards from a deck of cards. The images are in a folder on my desktop. I then display the images of the cards. My program runs fine as far as reading from the file and then randomly picking 3 cards out of the 52. I have the program printing the 3 random cards in the output. But I can not see the images of the cards when the java window opens up on my computer. It displays a small line that just continuously repeats. So I think it is trying to display the cards but I have something wrong somewhere that is keeping the whole card(s) from displaying.
Thanks in advance for your help!



import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class DisplayThreeCards

public static void main(String args)

// File location
File folder = new File("//Users//macuser//Desktop//DeckOfCards");
File fileList;
fileList = folder.listFiles();

// Generate random card. Uses the Math.rand() function.
// The '%' operator is used to make sure the random is between 0-52.
int randomCard = (int) (Math.random() * 1000);
System.out.println(fileList[randomCard % 52].getAbsolutePath());

// Print the filename.
// Card 1
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 2
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);
// Card 3
System.out.println(fileList[randomCard % 52].getName());
randomCard = (int) (Math.random() * 1000);

try
ImageFrame frame = new ImageFrame(fileList[randomCard % 52].getAbsolutePath());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
catch (Exception E)



// Create a window for the card images to be displayed
class ImageFrame extends JFrame

public ImageFrame(String name)
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

ImageComponent component = new ImageComponent(name);
add(component);


public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 300;


class ImageComponent extends JComponent

private static final long serialVersionUID = 1L;
private Image image;

public ImageComponent(String name)
try
File image2 = new File(name);
image = ImageIO.read(image2);
catch (IOException e)



@Override
public void paintComponent(Graphics g)
if (image == null)

int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this);

g.drawImage(image, 50, 50, this);

for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0)
g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);














java image swing






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 15 '18 at 23:38









Andrew Thompson

154k28164349




154k28164349










asked Nov 15 '18 at 17:38









S. CruzS. Cruz

62




62







  • 1





    there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

    – Sergey Grinev
    Nov 15 '18 at 18:11












  • In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

    – Andrew Thompson
    Nov 15 '18 at 23:40











  • .. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

    – Andrew Thompson
    Nov 15 '18 at 23:42












  • 1





    there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

    – Sergey Grinev
    Nov 15 '18 at 18:11












  • In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

    – Andrew Thompson
    Nov 15 '18 at 23:40











  • .. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

    – Andrew Thompson
    Nov 15 '18 at 23:42







1




1





there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

– Sergey Grinev
Nov 15 '18 at 18:11






there can be an error during the loading of an image, add an output to all catch (Exception E) blocks to see it. E.g. E.printStackTrace()

– Sergey Grinev
Nov 15 '18 at 18:11














In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

– Andrew Thompson
Nov 15 '18 at 23:40





In addition to the advice of @SergeyGrinev .. 1) Application resources will become embedded resources by the time of deployment, so it is wise to start accessing them as if they were, right now. An embedded-resource must be accessed by URL rather than file. See the info. page for embedded resource for how to form the URL. 2) Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and ..

– Andrew Thompson
Nov 15 '18 at 23:40













.. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

– Andrew Thompson
Nov 15 '18 at 23:42





.. use it consistently. 3) The paintComponent method of the ImageComponent class should immediately call the super method.

– Andrew Thompson
Nov 15 '18 at 23:42












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