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POIt runs OK in Eclipse but not able to run as .jar file
 

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  1. POIt runs OK in Eclipse but not able to run as .jar file
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    <p>I am writing a math program. Everything runs fine in Eclipse, but when I export them as .jar file. It did not run. When I double clicked on the .jar file, nothing happened. Here is a screenshot of my directory. Please help.</p> <p>Here are steps to export .jar file:</p> <p>File->Export->JAR file(under java), click Next. In the JAR File Specification, select "TestingMath", and then select: Export all output folders for checked projects. Export Java source files and resources. Export refactorings for checked projects.<br> Browse to Desktop for destination.<br> Then click finish.</p> <p><img src="https://i.stack.imgur.com/Es58O.jpg" alt="screenshot"></p> <pre><code>package math; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.net.URL; import java.util.Random; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.border.Border; import javax.swing.border.CompoundBorder; public class Testing extends JFrame implements ActionListener { /** * */ private static final long serialVersionUID = 1L; JLabel lblQuestion; JLabel lblImage; JButton bOK; JButton bExit; JPanel radioPanel; JPanel panBottom; JRadioButton[] radioButton; String [] store ; ButtonGroup bg; JButton bNext; JPanel mainPanel; JPanel pRight; JLabel lblCorrect; JLabel lblWrong; int vCorrect = 0; int vWrong = 0; JScrollPane scroll; public Testing() { //mc = mathCombine; //mc.setVisible(false); mainPanel = new JPanel(new BorderLayout()); buildingGUI(); //listAllFiles(); innitializeAllComponents(); URL url = getClass().getClassLoader().getResource("files/" + 1 + ".txt"); String strQuestion = readTextFile(url.toString(), 1); store = strQuestion.toString().split("!!!"); lblQuestion.setText("&lt;html&gt;" + store[0] + "&lt;/html&gt;"); //I need to get the image and display at the center according //to the fileNumber getTheImageAndDisplay(1); assignRandomNumberToRadioButton(store[1]); mainPanel.add(lblQuestion, BorderLayout.NORTH); mainPanel.add(radioPanel, BorderLayout.WEST); mainPanel.add(panBottom, BorderLayout.SOUTH); mainPanel.add(scroll, BorderLayout.CENTER); mainPanel.setPreferredSize(new Dimension(640, 480)); this.getContentPane().add(mainPanel); } private void getTheImageAndDisplay(int fileNumber) { // TODO Auto-generated method stub System.out.println("fileNumber for ismage: " + fileNumber); lblImage.setIcon(new ImageIcon(Testing.class.getResource("/images/" + fileNumber + ".png"))); //scroll = new JScrollPane(lblImage); } private void assignRandomNumberToRadioButton(String sAnswer) { // TODO Auto-generated method stub int number = Integer.parseInt(sAnswer.toString().trim()); //System.out.println("number: " + number); Random random = new Random(); int rand = random.nextInt(4); //This is the number of radioButton. //System.out.println("rand is: " + rand); System.out.println("Answer issss: " + sAnswer); radioButton[rand].setText(sAnswer); if(!radioButton[0].getText().equals("")) { radioButton[1].setText("" +( number + 2)); radioButton[2].setText("" + (number - 2)); radioButton[3].setText("" + (number + 1)); } else if(!radioButton[1].getText().equals("")) { radioButton[0].setText("" +( number + 2)); radioButton[2].setText("" + (number - 2)); radioButton[3].setText("" + (number + 1)); } else if(!radioButton[2].getText().equals("")) { radioButton[1].setText("" +( number + 2)); radioButton[0].setText("" + (number - 2)); radioButton[3].setText("" + (number + 1)); } else if(!radioButton[3].getText().equals("")) { radioButton[1].setText("" +( number + 2)); radioButton[2].setText("" + (number - 2)); radioButton[0].setText("" + (number + 1)); } } /** * Construct GUI. */ private void buildingGUI() { lblImage = new JLabel(); lblImage.setHorizontalAlignment(JLabel.CENTER); scroll = new JScrollPane(lblImage); bNext = new JButton("Next"); lblQuestion = new JLabel(); bOK = new JButton("OK"); bExit = new JButton("Exit"); lblQuestion.setFont(new Font("Tahoma", Font.PLAIN, 12)); radioPanel = new JPanel(); panBottom = new JPanel(); panBottom.setLayout(new GridLayout(1, 2)); panBottom.add(bOK); panBottom.add(bExit); bg = new ButtonGroup(); radioPanel.setLayout(new GridLayout(4, 1)); radioButton = new JRadioButton[4]; radioButton[0] = new JRadioButton(); radioButton[1] = new JRadioButton(); radioButton[2] = new JRadioButton(); radioButton[3] = new JRadioButton(); radioPanel.setLayout(new GridLayout(10, 1)); radioPanel.add(radioButton[0]); radioPanel.add(radioButton[1]); radioPanel.add(radioButton[2]); radioPanel.add(radioButton[3]); radioPanel.add(new JLabel()); radioPanel.add(new JLabel()); radioPanel.add(new JLabel()); radioPanel.add(bNext); radioPanel.add(new JLabel()); radioPanel.add(new JLabel()); bg.add(radioButton[0]); bg.add(radioButton[1]); bg.add(radioButton[2]); bg.add(radioButton[3]); pRight = new JPanel(); pRight.setLayout(new GridLayout(5, 2)); lblCorrect = new JLabel(); pRight.add(lblCorrect); lblWrong = new JLabel(); pRight.add(lblWrong); pRight.add(new JLabel(" ")); pRight.add(new JLabel(" ")); mainPanel.add(pRight, BorderLayout.EAST); } private int generateRandomNumber() { // TODO Auto-generated method stub Random random = new Random(); int rand = random.nextInt(20); //This is the number of Files in the system. return rand; } private void innitializeAllComponents() { // TODO Auto-generated method stub CompoundBorder border; Border raisedbevel = BorderFactory.createRaisedBevelBorder(); Border loweredbevel = BorderFactory.createLoweredBevelBorder(); border = BorderFactory.createCompoundBorder( raisedbevel, loweredbevel); lblQuestion.setFont(new Font("Tahoma", Font.PLAIN, 18)); lblQuestion.setBorder(BorderFactory.createLineBorder(Color.GREEN)); lblQuestion.setBorder(border); radioPanel.setBorder(border); pRight.setBorder(border); panBottom.setBorder(border); radioButton[0].setFont(new Font("Tahoma", Font.BOLD, 16)); radioButton[1].setFont(new Font("Tahoma", Font.BOLD, 16)); radioButton[2].setFont(new Font("Tahoma", Font.BOLD, 16)); radioButton[3].setFont(new Font("Tahoma", Font.BOLD, 16)); lblCorrect.setFont(new Font("Tahoma", Font.BOLD, 14)); lblCorrect.setForeground(Color.BLUE); lblCorrect.setHorizontalAlignment(JLabel.CENTER); lblWrong.setFont(new Font("Tahoma", Font.BOLD, 14)); lblWrong.setForeground(Color.red); lblWrong.setHorizontalAlignment(JLabel.CENTER); bNext.addActionListener(this); } @SuppressWarnings("resource") private String readTextFile(String fileName, int fileNumber) { // TODO Auto-generated method stub StringBuilder stringBuilder = new StringBuilder(); BufferedReader reader = null; try { Random random = new Random(); //int rand = random.nextInt(20); URL url = getClass().getClassLoader().getResource("files/" + fileNumber + ".txt"); File file = new File(url.toURI()); try { reader = new BufferedReader(new FileReader(file)); String line = null; stringBuilder = new StringBuilder(); String ls = System.getProperty("line.separator"); try { while(( line = reader.readLine()) != null ) { stringBuilder.append(line); stringBuilder.append(ls); } } catch(IOException e) { e.printStackTrace(); } } catch(IOException e) { e.printStackTrace(); } } catch(Exception e) { e.printStackTrace(); } return stringBuilder.toString(); } @Override public void actionPerformed(ActionEvent ae) { // TODO Auto-generated method stub if(ae.getSource().equals(bNext)) { //if nothing selected, display a message, //else: get the answer and display. if(!radioButton[0].isSelected() &amp;&amp; !radioButton[1].isSelected() &amp;&amp; !radioButton[2].isSelected() &amp;&amp; !radioButton[3].isSelected()) { JOptionPane.showMessageDialog(this,"Please select an Answer.", "Nothing selected", JOptionPane.OK_OPTION); return; } else //when user select an answer. { String strAnswer = ""; if(radioButton[0].isSelected()) { strAnswer = radioButton[0].getText().trim(); } else if(radioButton[1].isSelected()) { strAnswer = radioButton[1].getText().trim(); } else if(radioButton[2].isSelected()) { strAnswer = radioButton[2].getText().trim(); } else if(radioButton[3].isSelected()) { strAnswer = radioButton[3].getText().trim(); } if(strAnswer.equals(store[1].trim())) { String strCorrect = lblCorrect.getText(); if(strCorrect.equals("")) { strCorrect = "0"; } vCorrect = Integer.parseInt(strCorrect); vCorrect = vCorrect + 1; lblCorrect.setText("" + vCorrect); playSound("correct"); } else { String strWrong = lblWrong.getText(); if(strWrong.equals("")) { strWrong = "0"; } vWrong = Integer.parseInt(strWrong); vWrong = vWrong + 1; lblWrong.setText("" + vWrong); playSound("wrong"); } int fileNumber = generateRandomNumber(); URL url = null; String file = "files/" + fileNumber + ".txt"; url = this.getClass().getClassLoader().getResource(file); String strQuestion = readTextFile(url.toString(), fileNumber); store = strQuestion.toString().split("!!!"); lblQuestion.setText("&lt;html&gt;" + store[0] + "&lt;/html&gt;"); clearTextInAllRadioButtons(); assignRandomNumberToRadioButton(store[1]); getTheImageAndDisplay(fileNumber); } } } private void playSound(String sound) { // TODO Auto-generated method stub try { URL url = null; if(sound.equals("correct")) { url = this.getClass().getClassLoader().getResource("sound/ding.wav"); } else if(sound.equals("wrong")) { url = this.getClass().getClassLoader().getResource("sound/buzz.wav"); } AudioInputStream audioIn = AudioSystem.getAudioInputStream(url); // Get a sound clip resource. Clip clip = AudioSystem.getClip(); // Open audio clip and load samples from the audio input stream. clip.open(audioIn); clip.start(); } catch (UnsupportedAudioFileException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (LineUnavailableException e) { e.printStackTrace(); } } private void clearTextInAllRadioButtons() { // TODO Auto-generated method stub radioButton[0].setText(""); radioButton[1].setText(""); radioButton[2].setText(""); radioButton[3].setText(""); bg.clearSelection(); } public static void main(String[] s) { Testing mr = new Testing(); mr.pack(); mr.setVisible(true); } } </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USDanny Phung
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COWe're not going to look through all 379 lines of your code. Please narrow the problem down further.
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      1. POIt runs OK in Eclipse but not able to run as .jar file
      1. USDoorknob
    2. COFile->Export->"Runnable JAR file" if you want to run by double clicking.
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      1. POIt runs OK in Eclipse but not able to run as .jar file
      1. USDavey Chu
    3. COYou need to define which class to start in the manifest file
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      1. POIt runs OK in Eclipse but not able to run as .jar file
      1. USBalint Bako
 

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