WindowListener with JApplet
I added a WindowListener to JApplet
When i run my applet with appletviewer , the windowActivated event is working .But when i request the applet in a browser the windowActivated event is not getting fired.
Why is it so ?. Is there any alternative for that ?
the code i used in window activated event is
textField.requestFocusInWindow();
I haven't done this, but I would guess that putting your check-in code in the applet's destroy method would be the best option.
If you want to use a window listener, you'd have to move everything in your applet to a JFrame, and popup the JFrame when the applet starts instead. This means an extra window outside the browser window, which is not a pretty solution (although sometimes necessary).
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JButtons in JToolbar don't work with JApplet- why?
I made a JApplet which has a toolbar, populated with burrons that manipulate data from text files. The programs works perfectly when it is not a JApplet. However, once I converted it to a JApplet it does nothing. The code was exactly the same, but, pressing buttons does nothing when it is an applet. here is the complete code;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
public class CSE extends JApplet implements ActionListener, ItemListener
//GUI COMPONENTS
//ToolBar components
JToolBar mainSelect = new JToolBar("Materials");
JButton materials;
String materialNames[] = {"Fur Square", "Bolt of Linen", "Bolt of Damask", "Bolt of Silk", "Glob of Ectoplasm", "Steel Ingot", "Deldrimor Steel Ingot", "Monstrous Claw", "Monstrous Eye", "Monstrous Fang", "Ruby", "Lump of Charcoal", "Obsidian Shard", "Tempered Glass Vial", "Leather Square", "Elonian Leather Square", "Vial of Ink", "Roll of Parchment", "Roll of Vellum", "Spiritwood Plank", "Amber Chunk", "Jadeite Shard"};
ImageIcon materialIcons;
//Graphic components
JDesktopPane mainGraph = new JDesktopPane();
JPanel dailyGraph = new JPanel();
JPanel weeklyGraph = new JPanel();
JPanel finalPrices = new JPanel();
Box graphs = Box.createHorizontalBox();
//The Console
JFrame CSEFrame = new JFrame();
JSplitPane mainConsoleBackdrop = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
JSplitPane dataOut = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
JTextArea prediction = new JTextArea(10,10);
JScrollPane predictionScroll;
Box finalPricesLabels = Box.createVerticalBox();
Box finalPricesLay = Box.createVerticalBox();
JLabel finalBuy = new JLabel("Net Buy Price Change: 0.00");
JLabel finalSell = new JLabel("Net Sell Price Change: 0.00");
JLabel buySell = new JLabel("We recommend you: N/A");
JTextArea priceUpdate = new JTextArea(10, 10);
JTextArea priceUpdateWeekly = new JTextArea(10, 10);
JScrollPane priceUScrollW;
JScrollPane priceUScroll;
JCheckBox weeklySelect = new JCheckBox("To show weekly price changes.", false);
JCheckBox dailySelect = new JCheckBox("To show daily price changes.", true);
ButtonGroup dataToShow = new ButtonGroup();
//COMPONENTS FOR DATE; OBTAINING CORRECT FOLDER
String days[] = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
Calendar calSource = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
int day = calSource.get(Calendar.DAY_OF_MONTH);
int month = calSource.get(Calendar.MONTH);
int year = calSource.get(Calendar.YEAR);
int monthCheck [] = {Calendar.JANUARY, Calendar.FEBRUARY, Calendar.MARCH, Calendar.APRIL, Calendar.MAY, Calendar.JUNE, Calendar.JULY, Calendar.AUGUST, Calendar.SEPTEMBER, Calendar.OCTOBER, Calendar.NOVEMBER, Calendar.DECEMBER};
int dayS = day;
int monthS = month;
int yearS = year;
//if there is file found
boolean proceed = false;
//int data for analysis
int buyPrice;
int currentBuyPrice;
int sellPrice;
int currentSellPrice;
boolean weekly = false;
//tools for parsing and decoding input
String inputS = null;
String s = null;
Scanner [] week = new Scanner[7];
Scanner scanner;
int position = 0;
//weekly tools
String weekPos[] = {"Seventh", "Sixth", "Fifth", "Fourth", "Third", "Second", "First"};
int dayOfWeek = 0; //0 = 7 1 = 6...
public JButton getToolBarButton(String s)
String imgLoc = "TBar Icons/" +s +".gif";
java.net.URL imgURL = CSE.class.getResource(imgLoc);
JButton button = new JButton();
button.setActionCommand(s);
button.setToolTipText(s);
button.addActionListener(this);
if(imgURL != null)
button.setIcon(new ImageIcon(imgURL, s));
else
button.setText(s);
System.err.println("Couldn't find; " +imgLoc);
return button;
public CSE()
// super("Test CSE");
//CSEFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
for(int x=0; x<materialNames.length; x++)
materials = getToolBarButton(materialNames[x]);
mainSelect.add(materials);
//checkBoxes
dataToShow.add(weeklySelect);
dataToShow.add(dailySelect);
weeklySelect.addItemListener(this);
dailySelect.addItemListener(this);
// sizes
setSize(850, 850);
//colors and fonts
weeklyGraph.setBackground(new Color(250, 30, 40));
dailyGraph.setBackground(new Color(100, 40, 200));
//text Manip.
prediction.setLineWrap(true);
priceUpdate.setLineWrap(true);
//scrolling
predictionScroll = new JScrollPane(prediction, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
priceUScroll = new JScrollPane(priceUpdate, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
priceUScrollW = new JScrollPane(priceUpdateWeekly, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//main splitpane config.
mainConsoleBackdrop.setOneTouchExpandable(true);
mainConsoleBackdrop.setResizeWeight(.85);
//placement and Layout
//GraphLayout
graphs.add(Box.createHorizontalStrut(10));
graphs.add(dailyGraph);
graphs.add(Box.createHorizontalStrut(10));
graphs.add(weeklyGraph);
graphs.add(Box.createHorizontalStrut(10));
dataOut.setRightComponent(predictionScroll);
//consoleData layout
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(finalBuy);
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(finalSell);
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(buySell);
finalPricesLay.add(finalPricesLabels);
finalPricesLay.add(Box.createVerticalStrut(10));
finalPricesLay.add(weeklySelect);
finalPricesLay.add(dailySelect);
finalPricesLay.add(priceUScroll);
dataOut.setLeftComponent(finalPricesLay);
mainConsoleBackdrop.setTopComponent(graphs);
mainConsoleBackdrop.setBottomComponent(dataOut);
getContentPane().add(mainConsoleBackdrop);
getContentPane().add(mainSelect, BorderLayout.NORTH);
//visibility
// CSEFrame.setVisible(true);
//return(CSEFrame);
public void actionPerformed(ActionEvent e)
getMonth();
inputS = e.getActionCommand();
FileReader newRead = null;
try {
newRead = new FileReader(monthS +"-" +dayS +"-" +yearS +"/" +inputS +".dat");
proceed = true;
catch(FileNotFoundException f)
System.out.println("File not found");
proceed = false;
if(proceed)
BufferedReader bufferedReader = new BufferedReader(newRead);
scanner = new Scanner(bufferedReader);
scanner.useDelimiter("\n");
//starts daily analysis
getPrice(scanner);
//starts weekly analysis
weekly(inputS);
public void itemStateChanged(ItemEvent e)
if(weeklySelect.isSelected())
priceUpdateWeekly.setText("");
finalPricesLay.remove(priceUScroll);
finalPricesLay.add(priceUScrollW);
finalPrices.updateUI();
else
priceUpdate.setText("");
finalPricesLay.remove(priceUScrollW);
finalPricesLay.add(priceUScroll);
finalPrices.updateUI();
public void weekly(String inputS)
weekly = true;
for(int x = 0; x < 7; x++)
dateToUse(month, day, year, (x+1));
try
FileReader weeklySource = new FileReader(monthS +"-" +dayS +"-" +year +"/" +inputS +".dat");
BufferedReader weeklyBuffer = new BufferedReader(weeklySource);
week[x] = new Scanner(weeklyBuffer);
week[x].useDelimiter("\n");
getPrice(week[x]);
catch(FileNotFoundException f)
JOptionPane.showMessageDialog(this, "No such weekly files- going back;" +(x+1) +"days");
weekly = false;
dateReset();
public void getPrice(Scanner scanner)
while(scanner.hasNextLine())
//puts into string the next scan token
String s = scanner.next();
//takes the scan toke above and puts it into an editable enviroment
String [] data = s.split("\\s");
for(position = 0; position < data.length; position++)
//Scanner test to make sure loop can finish, otherwise "no such line" error
if(scanner.hasNextLine()==false)
scanner.close();
break;
/*Starts data orignazation by reading from each perspective field
* 1 = day
* 2 = day of month
* 3 = month
* 4 = year
if(position == 0 && weekly == false)
String dayFromFile = data[position];
int dayNum = Integer.parseInt(dayFromFile);
priceUpdate.append(days[dayNum-1] +" ");
else if(position == 1 && weekly == false )
priceUpdate.append(data[position] + "/");
else if(position == 2 && weekly == false)
priceUpdate.append(data[position] + "/");
else if(position == 3 && weekly == false)
priceUpdate.append(data[position] +"\n");
//if it is in [buy] area, it prints and computes
else if(position == 7)
//obtains string for buy price and stores it, then prints it
String buy = data[position];
if(weekly == false)
priceUpdate.append("Buy: " +buy +"\n" );
//converts buy to string
currentBuyPrice = Integer.parseInt(buy);
//eliminates problems caused by no data from server- makes the price 0
if(currentBuyPrice < 0)
currentBuyPrice = 0;
//if it is greater it adds
if(currentBuyPrice > buyPrice)
buyPrice += currentBuyPrice;
//if it is equal [there is no change] then it does nothing
if(currentBuyPrice == buyPrice)
buyPrice +=0;
//if there is a drop, it subtracts
else
buyPrice -= currentBuyPrice;
//if it is in [sell] area, it prints, and resets the position to zero because line is over
else if(position == 8)
//puts sell data into string and prints it
String sell = data[position];
if(weekly == false)
priceUpdate.append("Sell: " + sell +"\n");
//turns sell data into int.
currentSellPrice = Integer.valueOf(sell).intValue();;
//gets rid of problems caused by no data on server side- makes it 0
if(currentSellPrice < 0)
currentSellPrice = 0;
//adds if there is an increase
if(currentSellPrice > sellPrice)
sellPrice += currentSellPrice;
//does nothing if it is the same
if(currentSellPrice == sellPrice)
sellPrice +=0;
//subtracts if there is drop
else
sellPrice -= currentSellPrice;
//further protection against "No such line" and moves it down
if(scanner.hasNextLine() == true)
scanner.nextLine();
//if scanner is finished, prints out all lines
if(scanner.hasNextLine() == false && weekly == false)
finalBuy.setText("Net Buy Price Change: "+buyPrice);
finalSell.setText("Net Sell Price Change: " +sellPrice);
buyPrice = 0;
sellPrice = 0;
position = data.length;
else if(scanner.hasNextLine() == false && weekly == true)
priceUpdateWeekly.append("\n" +weekPos[dayOfWeek] +" day of the week ended with; \nBuy Price;" +buyPrice +"\nSell Price;" +sellPrice);
buyPrice = 0;
sellPrice = 0;
position = data.length;
dayOfWeek++;
if(dayOfWeek > 6)
dayOfWeek = 0;
public void getMonth()
for(int x=0; x < monthCheck.length; x++)
if(month == monthCheck[x])
monthS = (x+1);
x = monthCheck.length;
public void dateToUse(int month, int day, int year, int increment)
//set day of source
dayS = (day - increment);
//if day of source is less then O then we have moved to another month
if(dayS <= 0)
//checks the difference between how much we have incremented and the day we have started; this tells us how far into the new month we are
int incrementDay = increment - day;
//decrements month
monthS--;
//if month is less then zero, then we have moved into another year and month has become 12
if(monthS <= 0)
yearS--;
monthS = 12;
//the following looks at the current month and if it goes below it assigns the day to the proper ammount of days of the month before minus the days into the month
if(month == 3)
dayS = 28 - incrementDay;
else if(month == 5 || month == 7)
dayS = 29 - incrementDay;
else if(month == 2 || month == 4 || month == 6 || month == 9 || month == 11)
dayS = 31 - incrementDay;
else
dayS = 30 - incrementDay;
//resets the source date to the current date once data from the week has been reached
public void dateReset()
dayS = day;
monthS = month;
yearS = year;
public void init()
//JFrame frame = new CSEFrameSet();
// this.setContentPane(CSEFrameSet());
CSE aCSE = new CSE();
public static void main(String [] args)
CSE cs = new CSE();
}I have tried uploading it to a server, running it from appletviewer, and locally using the .HTML file. The GUI works fine, everything is there, however, pressing the buttons does nothing.
Can you not use the Scanners and such with JApplets?
Yes, the directories are good.
EDIT EDIT EDIT; OK, it works with appletviewer, but still doesn't work when it is published.
Message waI can't seem to edit the post anymore, here it is again;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
public class CSE extends JApplet implements ActionListener, ItemListener
//GUI COMPONENTS
//ToolBar components
JToolBar mainSelect = new JToolBar("Materials");
JButton materials;
String materialNames[] = {"Fur Square", "Bolt of Linen", "Bolt of Damask", "Bolt of Silk", "Glob of Ectoplasm", "Steel Ingot", "Deldrimor Steel Ingot", "Monstrous Claw", "Monstrous Eye", "Monstrous Fang", "Ruby", "Lump of Charcoal", "Obsidian Shard", "Tempered Glass Vial", "Leather Square", "Elonian Leather Square", "Vial of Ink", "Roll of Parchment", "Roll of Vellum", "Spiritwood Plank", "Amber Chunk", "Jadeite Shard"};
ImageIcon materialIcons;
//Graphic components
JDesktopPane mainGraph = new JDesktopPane();
JPanel dailyGraph = new JPanel();
JPanel weeklyGraph = new JPanel();
JPanel finalPrices = new JPanel();
Box graphs = Box.createHorizontalBox();
//The Console
JFrame CSEFrame = new JFrame();
JSplitPane mainConsoleBackdrop = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
JSplitPane dataOut = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
JTextArea prediction = new JTextArea(10,10);
JScrollPane predictionScroll;
Box finalPricesLabels = Box.createVerticalBox();
Box finalPricesLay = Box.createVerticalBox();
JLabel finalBuy = new JLabel("Net Buy Price Change: 0.00");
JLabel finalSell = new JLabel("Net Sell Price Change: 0.00");
JLabel buySell = new JLabel("We recommend you: N/A");
JTextArea priceUpdate = new JTextArea(10, 10);
JTextArea priceUpdateWeekly = new JTextArea(10, 10);
JScrollPane priceUScrollW;
JScrollPane priceUScroll;
JCheckBox weeklySelect = new JCheckBox("To show weekly price changes.", false);
JCheckBox dailySelect = new JCheckBox("To show daily price changes.", true);
ButtonGroup dataToShow = new ButtonGroup();
//COMPONENTS FOR DATE; OBTAINING CORRECT FOLDER
String days[] = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
Calendar calSource = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
int day = calSource.get(Calendar.DAY_OF_MONTH);
int month = calSource.get(Calendar.MONTH);
int year = calSource.get(Calendar.YEAR);
int monthCheck [] = {Calendar.JANUARY, Calendar.FEBRUARY, Calendar.MARCH, Calendar.APRIL, Calendar.MAY, Calendar.JUNE, Calendar.JULY, Calendar.AUGUST, Calendar.SEPTEMBER, Calendar.OCTOBER, Calendar.NOVEMBER, Calendar.DECEMBER};
int dayS = day;
int monthS = month;
int yearS = year;
//if there is file found
boolean proceed = false;
//int data for analysis
int buyPrice;
int currentBuyPrice;
int sellPrice;
int currentSellPrice;
boolean weekly = false;
//tools for parsing and decoding input
String inputS = null;
String s = null;
Scanner [] week = new Scanner[7];
Scanner scanner;
int position = 0;
//weekly tools
String weekPos[] = {"Seventh", "Sixth", "Fifth", "Fourth", "Third", "Second", "First"};
int dayOfWeek = 0; //0 = 7 1 = 6...
public JButton getToolBarButton(String s)
String imgLoc = "TBar Icons/" +s +".gif";
java.net.URL imgURL = CSE.class.getResource(imgLoc);
JButton button = new JButton();
button.setActionCommand(s);
button.setToolTipText(s);
button.addActionListener(this);
if(imgURL != null)
button.setIcon(new ImageIcon(imgURL, s));
else
button.setText(s);
System.err.println("Couldn't find; " +imgLoc);
return button;
public CSE()
// super("Test CSE");
//CSEFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
for(int x=0; x<materialNames.length; x++)
materials = getToolBarButton(materialNames[x]);
mainSelect.add(materials);
//checkBoxes
dataToShow.add(weeklySelect);
dataToShow.add(dailySelect);
weeklySelect.addItemListener(this);
dailySelect.addItemListener(this);
// sizes
setSize(850, 850);
//colors and fonts
weeklyGraph.setBackground(new Color(250, 30, 40));
dailyGraph.setBackground(new Color(100, 40, 200));
//text Manip.
prediction.setLineWrap(true);
priceUpdate.setLineWrap(true);
//scrolling
predictionScroll = new JScrollPane(prediction, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
priceUScroll = new JScrollPane(priceUpdate, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
priceUScrollW = new JScrollPane(priceUpdateWeekly, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//main splitpane config.
mainConsoleBackdrop.setOneTouchExpandable(true);
mainConsoleBackdrop.setResizeWeight(.85);
//placement and Layout
//GraphLayout
graphs.add(Box.createHorizontalStrut(10));
graphs.add(dailyGraph);
graphs.add(Box.createHorizontalStrut(10));
graphs.add(weeklyGraph);
graphs.add(Box.createHorizontalStrut(10));
dataOut.setRightComponent(predictionScroll);
//consoleData layout
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(finalBuy);
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(finalSell);
finalPricesLabels.add(Box.createVerticalStrut(10));
finalPricesLabels.add(buySell);
finalPricesLay.add(finalPricesLabels);
finalPricesLay.add(Box.createVerticalStrut(10));
finalPricesLay.add(weeklySelect);
finalPricesLay.add(dailySelect);
finalPricesLay.add(priceUScroll);
dataOut.setLeftComponent(finalPricesLay);
mainConsoleBackdrop.setTopComponent(graphs);
mainConsoleBackdrop.setBottomComponent(dataOut);
getContentPane().add(mainConsoleBackdrop);
getContentPane().add(mainSelect, BorderLayout.NORTH);
//visibility
// CSEFrame.setVisible(true);
//return(CSEFrame);
public void actionPerformed(ActionEvent e)
getMonth();
inputS = e.getActionCommand();
FileReader newRead = null;
try {
newRead = new FileReader(monthS +"-" +dayS +"-" +yearS +"/" +inputS +".dat");
proceed = true;
catch(FileNotFoundException f)
System.out.println("File not found");
proceed = false;
if(proceed)
BufferedReader bufferedReader = new BufferedReader(newRead);
scanner = new Scanner(bufferedReader);
scanner.useDelimiter("\n");
//starts daily analysis
getPrice(scanner);
//starts weekly analysis
weekly(inputS);
public void itemStateChanged(ItemEvent e)
if(weeklySelect.isSelected())
priceUpdateWeekly.setText("");
finalPricesLay.remove(priceUScroll);
finalPricesLay.add(priceUScrollW);
finalPrices.updateUI();
else
priceUpdate.setText("");
finalPricesLay.remove(priceUScrollW);
finalPricesLay.add(priceUScroll);
finalPrices.updateUI();
public void weekly(String inputS)
weekly = true;
for(int x = 0; x >< 7; x++)
dateToUse(month, day, year, (x+1));
try
FileReader weeklySource = new FileReader(monthS +"-" +dayS +"-" +year +"/" +inputS +".dat");
BufferedReader weeklyBuffer = new BufferedReader(weeklySource);
week[x] = new Scanner(weeklyBuffer);
week[x].useDelimiter("\n");
getPrice(week[x]);
catch(FileNotFoundException f)
JOptionPane.showMessageDialog(this, "No such weekly files- going back;" +(x+1) +"days");
weekly = false;
dateReset();
public void getPrice(Scanner scanner)
while(scanner.hasNextLine())
//puts into string the next scan token
String s = scanner.next();
//takes the scan toke above and puts it into an editable enviroment
String [] data = s.split("\\s");
for(position = 0; position < data.length; position++)
//Scanner test to make sure loop can finish, otherwise "no such line" error
if(scanner.hasNextLine()==false)
scanner.close();
break;
/*Starts data orignazation by reading from each perspective field
* 1 = day
* 2 = day of month
* 3 = month
* 4 = year
if(position == 0 && weekly == false)
String dayFromFile = data[position];
int dayNum = Integer.parseInt(dayFromFile);
priceUpdate.append(days[dayNum-1] +" ");
else if(position == 1 && weekly == false )
priceUpdate.append(data[position] + "/");
else if(position == 2 && weekly == false)
priceUpdate.append(data[position] + "/");
else if(position == 3 && weekly == false)
priceUpdate.append(data[position] +"\n");
//if it is in [buy] area, it prints and computes
else if(position == 7)
//obtains string for buy price and stores it, then prints it
String buy = data[position];
if(weekly == false)
priceUpdate.append("Buy: " +buy +"\n" );
//converts buy to string
currentBuyPrice = Integer.parseInt(buy);
//eliminates problems caused by no data from server- makes the price 0
if(currentBuyPrice < 0)
currentBuyPrice = 0;
//if it is greater it adds
if(currentBuyPrice > buyPrice)
buyPrice += currentBuyPrice;
//if it is equal [there is no change] then it does nothing
if(currentBuyPrice == buyPrice)
buyPrice +=0;
//if there is a drop, it subtracts
else
buyPrice -= currentBuyPrice;
//if it is in [sell] area, it prints, and resets the position to zero because line is over
else if(position == 8)
//puts sell data into string and prints it
String sell = data[position];
if(weekly == false)
priceUpdate.append("Sell: " + sell +"\n");
//turns sell data into int.
currentSellPrice = Integer.valueOf(sell).intValue();;
//gets rid of problems caused by no data on server side- makes it 0
if(currentSellPrice < 0)
currentSellPrice = 0;
//adds if there is an increase
if(currentSellPrice > sellPrice)
sellPrice += currentSellPrice;
//does nothing if it is the same
if(currentSellPrice == sellPrice)
sellPrice +=0;
//subtracts if there is drop
else
sellPrice -= currentSellPrice;
//further protection against "No such line" and moves it down
if(scanner.hasNextLine() == true)
scanner.nextLine();
//if scanner is finished, prints out all lines
if(scanner.hasNextLine() == false && weekly == false)
finalBuy.setText("Net Buy Price Change: "+buyPrice);
finalSell.setText("Net Sell Price Change: " +sellPrice);
buyPrice = 0;
sellPrice = 0;
position = data.length;
else if(scanner.hasNextLine() == false && weekly == true)
priceUpdateWeekly.append("\n" +weekPos[dayOfWeek] +" day of the week ended with; \nBuy Price;" +buyPrice +"\nSell Price;" +sellPrice);
buyPrice = 0;
sellPrice = 0;
position = data.length;
dayOfWeek++;
if(dayOfWeek > 6)
dayOfWeek = 0;
public void getMonth()
for(int x=0; x < monthCheck.length; x++)
if(month == monthCheck[x])
monthS = (x+1);
x = monthCheck.length;
public void dateToUse(int month, int day, int year, int increment)
//set day of source
dayS = (day - increment);
//if day of source is less then O then we have moved to another month
if(dayS <= 0)
//checks the difference between how much we have incremented and the day we have started; this tells us how far into the new month we are
int incrementDay = increment - day;
//decrements month
monthS--;
//if month is less then zero, then we have moved into another year and month has become 12
if(monthS <= 0)
yearS--;
monthS = 12;
//the following looks at the current month and if it goes below it assigns the day to the proper ammount of days of the month before minus the days into the month
if(month == 3)
dayS = 28 - incrementDay;
else if(month == 5 || month == 7)
dayS = 29 - incrementDay;
else if(month == 2 || month == 4 || month == 6 || month == 9 || month == 11)
dayS = 31 - incrementDay;
else
dayS = 30 - incrementDay;
//resets the source date to the current date once data from the week has been reached
public void dateReset()
dayS = day;
monthS = month;
yearS = year;
public void init()
//JFrame frame = new CSEFrameSet();
// this.setContentPane(CSEFrameSet());
CSE aCSE = new CSE();
public static void main(String [] args)
CSE cs = new CSE();
}Message was edited by:
Cybergasm -
I'm having a weird problem with JApplet. So first I create an Applet with this code
public class japp extends JApplet {
public void init() {
Container content=getContentPane();
JButton jb=new JButton("Hello");
content.add(jb);
}and with this in the .html file;
<html>
<body>
<APPLET CODE="japp.class" WIDTH="650" HEIGHT="500"></APPLET>
</body>
</html>
And opened it in Firefox, it worked as expected. However, when I change the code in any way, i.e.
public class japp extends JApplet {
public void init() {
Container content=getContentPane();
JButton jb=new JButton("Goodbye");
content.add(jb);
}and compile it, it still shows the old button that displays "Hello". I've tried deleting the .class file from before and recompiling, that doesn't work. What am I doing wrong?
Thanks.Reloading the page usually doesn't work. You will need to open the Java Console and clear classloader cache (x). You can also use appletviewer for testing purposes.
-
Fighting with JApplet and HTML
Ifmy Browser is using jvm1.4.1 do I still have to use the html converter to display my JApplet?
This is the error I get from the java console:
java.lang.InstantiationException: QuestionScreen
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Thanks
JimThe reason that I ask is because if the MS JVM is used, which is version 1.1, and an applet that has been compiled with a recent version of Sun JVM like 1.4.2 attempts to run in the MS JVM, then a ClassNotFoundException will be generated regardless of the position of the class files. So it is very important to determine that your browser is really using the Sun JVM..Try to view the console with the applet running to be sure.
Note that the applet tag has been deprecated. But if you use the applet tag, I suggest including a codebase attribute such as "." which refers to the current working directory, where the index.html file originated.
<applet code="com.myjavaserver.codecraig.applet.JMoviesApplet.class" codebase="." archive="JMovies.jar, jdom.jar, packer.jar" width="800" height="600">
Your browser is completely ignoring the <APPLET> tag.
</applet>You may want to try the object tag, and see if you can avoid the error. The class id value is for dynamic versioning..
<object classid="8AD9C840-044E-11D1-B3E9-00805F499D93" width="800" height="600">
<param name="type" value="application/x-java-applet;version=1.4">
<param name="code" value="com.myjavaserver.codecraig.applet.JMoviesApplet.class">
<param name="codebase" value=".">
<param name="archive" value="JMovies.jar, jdom.jar, packer.jar">
Your browser is completely ignoring the <object> tag.
</object> -
Problems with JApplet, jar-Archive, packages and IE5
Hello!
I have a problem with a JApplet and Internet Explorer 5. I made a jar archive of my classes. The classes are
members of a package. The jar archive also contains images.
The structure of the archive:
com/mycomp/myapp/DemoApplication.class
com/mycomp/myapp/DemoApplet.class
<more classes>
com/mycomp/myapp/images/hp_logo.gif
com/mycomp/myapp/images/test.gif
<more images>
The archive is stored locally in a directory which contains also the html file.
I used the sdk 1.3.1 to compile the classes.
My problem: when I start the html file on NT with IE5, I get the error message below:
I try to create a label containing an icon with:
topLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("images"+fs+"hp_logo.gif")));It works on Sun with Netscape 4.67 and SDK 1.3.1 installed.
Should I move the images directory inside the jar archive to another place or is the html code not correct?
The error message:
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at com.mycomp.myapp.DemoApplication.initComponents(DemoApplication.java:158)
at com.mycomp.myapp.DemoApplication.<init>(DemoApplication.java:55)
at com.mycomp.myapp.DemoApplet.<init>(DemoApplet.java:24)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)The html file:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<title>DemoApplet</title>
</head>
<body>
<BODY LINK="#0000ff" VLINK="#800080" BGCOLOR="#37a1a7">
<h1>DemoApplet</h1>
<!--"CONVERTED_APPLET"-->
<!-- HTML CONVERTER -->
<SCRIPT LANGUAGE="JavaScript"><!--
var _info = navigator.userAgent; var _ns = false; var _ns6 = false;
var _ie = (_info.indexOf("MSIE") > 0 && _info.indexOf("Win") > 0 && _info.indexOf("Windows 3.1") < 0);
//--></SCRIPT>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"><!--
var _ns = (navigator.appName.indexOf("Netscape") >= 0 && ((_info.indexOf("Win") > 0 && _info.indexOf("Win16") < 0 && java.lang.System.getProperty("os.version").indexOf("3.5") < 0) || (_info.indexOf("Sun") > 0) || (_info.indexOf("Linux") > 0) || (_info.indexOf("AIX") > 0) || (_info.indexOf("OS/2") > 0)));
var _ns6 = ((_ns == true) && (_info.indexOf("Mozilla/5") >= 0));
//--></SCRIPT></COMMENT>
<SCRIPT LANGUAGE="JavaScript"><!--
if (_ie == true) document.writeln('<OBJECT classid="clsid:CAFEEFAC-0013-0001-0000-ABCDEFFEDCBA" WIDTH = 695 HEIGHT = 525 codebase="http://java.sun.com/products/plugin/1.3.1/jinstall-131-win32.cab#Version=1,3,1,0"><NOEMBED><XMP>');
else if (_ns == true && _ns6 == false) document.writeln('<EMBED type="application/x-java-applet;jpi-version=1.3.1" CODE = com.mycomp.myapp.DemoApplet CODEBASE = "." ARCHIVE = "DemoApplet.jar,classes12.zip" WIDTH = 800 HEIGHT = 600 scriptable=false pluginspage="http://java.sun.com/products/plugin/1.3.1/plugin-install.html"><NOEMBED><XMP>');
//--></SCRIPT>
<APPLET CODE = com.mycomp.myapp.DemoApplet CODEBASE = "." ARCHIVE = "DemoApplet.jar,classes12.zip" WIDTH = 695 HEIGHT = 525></XMP>
<PARAM NAME = CODE VALUE = com.mycomp.myapp.DemoApplet >
<PARAM NAME = CODEBASE VALUE = "." >
<PARAM NAME = ARCHIVE VALUE = "DemoApplet.jar,classes12.zip" >
<PARAM NAME="type" VALUE="application/x-java-applet;jpi-version=1.3.1">
<PARAM NAME="scriptable" VALUE="false">
</APPLET>
</NOEMBED></EMBED></OBJECT>
<!--
<APPLET CODE = DemoApplet CODEBASE = "." ARCHIVE = "DemoApplet.jar,classes12.zip" WIDTH = 695 HEIGHT = 525>
</APPLET>
-->
<!--"END_CONVERTED_APPLET"-->
</body>
</html>Thank you for your help!
Gruesse,
Torstenseems like it couldn't find the image file... try to give it the absolute path to the file first to see if this is the root of the problem... and then try to find alternative ways to not give it the absolute path...
-
JMenus with (JApplet inside JInternalFrame)
Hi all,
I am trying to display a JApple in JInternalFrame, all this components are in a JFrame with some JMenus
The problem: when I click a JMenu to display its JMenuItems, these JMenuItems appears to be displayed behind the JApplet.
Can any expert help me with this??
My code is something like that:
import java.awt.*;
import javax.swing.*;
public class MyFrame extends JFrame
public MyFrame()
super("My Frame");
//Create the menu bar.
JMenuBar menuBar = new JMenuBar();
this.setJMenuBar(menuBar);
//create Menus and add them to the MenuBar
JMenu fileMenu = new JMenu("File");
JMenu playMenu = new JMenu("Play");
menuBar.add(fileMenu);
menuBar.add(playMenu);
//Create MenuItems
JMenuItem new1 = new JMenuItem("New...");
JMenuItem open = new JMenuItem("Open...");
JMenuItem exit = new JMenuItem("Exit");
JMenuItem start = new JMenuItem("Start");
JMenuItem stop = new JMenuItem("Stop");
JMenuItem next = new JMenuItem("Next");
JMenuItem previous = new JMenuItem("Previous");
//add menuItems in the menus
fileMenu.add(new1);
fileMenu.add(open);
fileMenu.addSeparator();
fileMenu.add(exit);
playMenu.add(start);
playMenu.add(stop);
playMenu.add(next);
playMenu.add(previous);
//Internal Frame in the CENTER
JInternalFrame internalFrame = new JInternalFrame("Internal Frame", false, false, false);
this.add(internalFrame, BorderLayout.CENTER);
internalFrame.add(new JApplet());
internalFrame.pack();
internalFrame.setVisible(true);
public static void main(String[] args)
JFrame frame = new MyFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
frame.setExtendedState(MAXIMIZED_BOTH);
}You need to set the menus to be heavyweight:
fileMenu.getPopupMenu().setLightWeightPopupEnabled(false);
playMenu.getPopupMenu().setLightWeightPopupEnabled(false);Read here about it:
http://java.sun.com/docs/books/tutorial/uiswing/components/menu.html#popup
Also usually, you add internal frames to a desktop pane.
Read the tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/internalframe.html -
Need a JFrame with JApplet example
is there an example of an applet or JApplet that opens a bunch of JFrames with menu and scroll bars and changes graphics on the JFrames based upon mouse events?
is there an example of an applet or JApplet that
opens a bunch of JFrames with menu and scroll bars
and changes graphics on the JFrames based upon mouse
events?I'm not sure. I've never seen one here (but I haven't looked for it either). You could google it, or if that turns up nothing, why not give it a stab yourself and then come back here if you stumble over a specific step in the process.
Good luck. -
Urgent Little Problem with JApplet
Hi, i have a little problem, i have an applet that loads on a webpage
it contains two textFields and a command button , i want when i click
on the button i should open a new page with the values in the two TextFields.
Thanks.Use getAppletContext().showDocument(URL url).
================================
Sincerely,
Melnikov V
AlarIT programmer
http://www.AlarIT.com
================================ -
My program worked fine as a standalone, but when i tried to convert it to an applet, a pop up box looking for a file in my a: drive comes up and after i close it the applet is terminated. Any ideas on whas goin on??
cheers-Anybody?
-
How can I find out if I'm using the Java-plugin in my browser and how can I set my computer to use the plugin if it is using the browsers default JVM?
You have to modify your html header :
The important thing is the OBJECT classid : it must be exactly the same as given.
<html>
<head>
<title>My Swing Applet</title>
</head>
<body>
<h1>My Swing Applet</h1>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" WIDTH = 695 HEIGHT = 525 codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME = CODE VALUE = MyApplet >
<PARAM NAME = CODEBASE VALUE = "." >
<PARAM NAME = ARCHIVE VALUE = "MyApplet.jar" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<PARAM NAME="scriptable" VALUE="false">
</OBJECT>
</body>
</html>
Denis -
Hi there,
I'm a new member in Java Developer forums, I hope that I'll be an effective member..
for now I need help with java sound , multimedia
I'm developing a program that part of it is to play array of sounds (Not JApplet) I tried to use the function AudioClip(getClass().getResources("soundName.wav"); but it works only with JApplet
I want to play the sound without JApplet
I found that there is a package called javax.swing.sound.*;
but syntax error occured in my program.. that this package does not exist..
Please help me..I am also having the same problem. I couldn't get sound to work with the applet based one. I have the below code, it compiles and when you run the program it runs the length of the audio file but there is no sound? Is there something missing?
import sun.audio.*; //import the sun.audio package
import java.io.*;
public class sound{
public static void main (String args[])
try
InputStream in = new FileInputStream("cows2.au");
AudioStream as = new AudioStream(in);
AudioPlayer.player.start(as);
AudioPlayer.player.stop(as);
catch (Exception e)
System.out.println("Failed");
} //end classMessage was edited by:
Lisa_g -
Netscape sacks why my JApplet doesn't work??
Hi
It's me again. I got it to work in IE5.0 to work with japplet after downloading the JRE and HTML converter but but it doesn't work in Netscape 4. I see the the applet got message on it saying "downloading applet" but never finished download. What do you think is wrong with it?
I check the posting frequently because I am at work
Thanks for any hints!Hi,
Try to copy %JAVA_HOME%\jre\bin\npjava32.dll to the plugins folder of netscape and restart your browser.
Hope this helps,
Kurt. -
Japplet throws ClassNotFoundException
I've built an applet (from JApplet) that consumes several other jar files. I've signed the jar that contains the main class and included all of the jars I need (I think). However, no matter what I try, I consistently get "java.lang.ClassNotFoundException: newposting" where 'newposting' is the main class within my signed jar. I'm using the following html for this:
<p><applet code="newposting" archive="HartfordRowingNewPosting.jar, javax.mail.jar, jcalendar-1.4.jar, junit-4.6.jar, jgoodies-common-1.2.0.jar, jgoodies-looks-2.4.1.jar, mysql-connector-java-5.1.25-bin.jar" width="500" height="850">
<param name="permissions" value="sandbox" /> <param name="codebase" value="HartfordRowingNewPosting" /></applet></p>
I've been frustrated with this on and off for the last month or so. Can someone shed some light on this? Am I getting this error because of JApplet?I doubt it's to do with JApplet.
It's too long ago for me to remember what, if any, is the significance to the applet of your codebase parameter (as opposed to attribute), but I'm a bit suspicious of that and also of the code attribute: does signed code have to be in a package, or is it OK for it to be in the default package? Certainly, the applet class name "newposting" is contrary to convention, though that wouldn't cause an error in itself.. So I'd be tempted to refactor to put your classes in a package (i.e. include the package statement in your .java files).
What does your web server access log say? Lot's of 200 and 304 status codes, or 404? -
Open new browser window from a JApplet
Hi,
I want to open a new browser window from a JApplet.My first thought was to use the Live Connect technology but it worked only with simple applets not with JApplets.Then i tried it by getting the Applet context (getAppletContext() method) but it still didn't work with JApplet...(it worked with Applet).I believe it has something to do with the applet security but i haven't yet figured it out.
For example when i call the getAppletContext() method from a JApplet i get an java.security.AccessControlException ... .ThanksI must correct myself now :).
The getAppletContext() method does work with JApplets too.Still , i have problems with the Live connection alternative.It seems that it by importing the netscape.javascript package i get the security eror that i mention above... -
Hello again world.
The following program simply displays a scrolling banner in a browser window:
import java.awt.*;
import java.applet.*;
import javax.swing.*; // this will be clear later
public class Banner extends Applet implements Runnable
private Thread bannerThread = null;
private int x;
public void init()
setBackground(Color.YELLOW);
x = 10;
public void start()
if (bannerThread == null)
bannerThread = new Thread(this);
bannerThread.start();
public void run()
Thread myThread = Thread.currentThread();
while (bannerThread == myThread)
try
Thread.sleep(100);
catch (InterruptedException e){}
repaint();
public void paint(Graphics g)
x += 5;
Dimension d = getSize();
if (x > (d.width - 10))
x = 10;
g.setFont(new Font("Serif" , Font.BOLD , 24));
g.setColor(Color.BLUE);
g.drawString("Why a duck . . why a no chicken?" , x , 50);
public void stop()
bannerThread = null;
}Works fine.
Now, according to the API, JApplets inherit init(), start(), and stop() directly from Applet.
They both inherit getSize(), repaint(), and setBackground() from Component and both override paint() in Container.
Everything else, except "x", is related to either Thread or Graphics.
So, I thought, "why not extend my Banner class from JApplet instead of Applet - it should behave identically".
Surprise . . . surprise. Instead of a scrolling banner I get a solid 24 point blue line.
My suspicion is it has something to do with Graphics but I can't, for the life of me, figure it out.
Any help will be greatly appreciated.
Thank you one and all.
Ciao for now.Howdy,
dare I answer? Unlike Applet you need to use the contentPane in a JApplet. Here is a new version that works with JApplet.
import java.awt.*;
import java.applet.*;
import javax.swing.*; // this will be clear later
public class Banner extends JApplet implements Runnable {
private Thread bannerThread = null;
private int x = 10;
private JPanel needThis;
public void init() {
final Dimension appletSize = getSize();
needThis = new JPanel(){
protected void paintComponent(Graphics g) {
super.paintComponent(g);
x += 5;
if (x > (appletSize.width - 10)) {
x = 10;
g.setFont(new Font("Serif" , Font.BOLD , 24));
g.setColor(Color.BLUE);
g.drawString("Why a duck . . why a no chicken?", x, 50);
needThis.setBackground(Color.yellow);
getContentPane().add(needThis);
public void start() {
if (bannerThread == null) {
bannerThread = new Thread(this);
bannerThread.start();
public void run() {
Thread myThread = Thread.currentThread();
while (bannerThread == myThread) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {}
needThis.repaint();
public void stop() {
bannerThread = null;
}Quite a difference. I've created a JPanel and added that to the contentPane of the JApplet. The repaint therefore calls the paintComponent method of the JPanel. Because I wanted to reference the size of the applet in the inner class I needed to make it final. Also note the call to super.paintComponent().
Regards
sjl
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