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  • How to close IOs?

    - by blackdog
    when i managed IO, i found a problem. i used to close it like this: try { // my code } catch (Exception e) { // my code } finally{ if (is != null) { is.close(); } } but the close method also would throw exception. if i have more than one IO, i have to close all of them. so the code maybe like this: try { // my code } catch (Exception e) { // my code } finally{ if (is1 != null) { is1.close(); } if(is2 != null{ is2.close(); } // many IOs } if is1.close() throws an exception, is2, is3 would not close itself. So i have to type many try-catch-finally to control them. is there other way to solve the problem?

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  • How to see full compile path in Eclipse?

    - by alleywayjack
    I have looked for an answer for this nearly every where that I can think of, but there doesn't seem to be any way to actually SEE what Eclipse "runs" to compile the projects (as it does need the JDK installed and visible to actually build). I ask because I imported a few jars into my project, and even though I've looked through all the javac documentation, I can't seem to figure out how to mimic it quite like Eclipse does. I really, really need to be able to compile on the command line in this case - Eclipse or any other IDE just isn't what is needed. I started to look through the Eclipse source, and although this sounds lazy, I just became overwhelmed and figured I would ask here first, hoping someone else had the same question at one point.

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  • Android: how to get the walking distance between two geo coordinats?

    - by wei
    I used this query URL http://maps.google.com/maps?q=from+A+to+B&output=kml ,which is given in the answer to this question. But after I tried it, it doesn't work with coordinates. It works with address names tho. I guess I could use google's geocoding to get the addresses first. But I wonder if there is another way to get the walking distance between two coordinates?

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  • why isn't the input text file being read into the ArrayList<String>, diary?

    - by hmg
    Here's my code: public void readFile() throws IOException { System.out.println("Input file name: "); Scanner in = new Scanner(System.in); String readName = in.nextLine(); Scanner reader = new Scanner(new File(readName)); System.out.println("Reading file..."); while (reader.hasNextLine()) { System.out.println(reader.nextLine()); } System.out.println("File read."); Scanner inAgain = new Scanner(System.in); System.out.println("Would you like to read this into the current Diary?"); System.out.println("Warning: This will overwrite your current Diary!"); String readFileConfirm = inAgain.nextLine(); ArrayList<String> readData = new ArrayList<String>(); if (readFileConfirm.equalsIgnoreCase("yes")) { for (int i = 0; i < readData.size(); i++) { readData.add(reader.nextLine()); } System.out.println("Data added to extra array..."); System.out.println("Here are the contents."); for (int i = 0; i < readData.size(); i++) { System.out.println(readData.get(i)); } System.out.println("Contents read."); System.out.println("Now overwriting current Diary with read file..."); diary.clear(); for (int i = 0; i < diary.size(); i++) { diary.add(readData.get(i)); } System.out.println("New Diary created!"); System.out.println("Use 'recall' to see your new Diary!"); } else { System.out.println("Very well, returning to first command entry."); } } Thanks in advance! -h

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  • JPanel superclass doesn't add the components of its subclasses..

    - by Acryl
    Well, I use a JFrame that adds two JPanels. Those JPanels are superclasses, because I find it easier to separate different areas of the GUI into different classes. But here's the problem: I add the (superclass) JPanel to the JFrame I set the layout of the superclass JPanel to new BorderLayout(); I add components in the subclasses, like this: JPanel panel = new JPanel(); panel.setLayout(new GridLayout(2,1)); panel.add(new JLabel("Label:"); panel.add(new JTextField(); add(panel, BorderLayout.NORTH); But it doesn't show. What do I do wrong? I've tried it without an additional JPanel in the subclasses, but it doesn't work either. I use jdk 1.6

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  • Polymorphic behavior not being implemented

    - by Garrett A. Hughes
    The last two lines of this code illustrate the problem: the compiler works when I use the reference to the object, but not when I assign the reference to an array element. The rest of the code is in the same package in separate files. BioStudent and ChemStudent are separate classes, as well as Student. package pkgPoly; public class Poly { public static void main(String[] arg) { Student[] stud = new Student[3]; // create a biology student BioStudent s1 = new BioStudent("Tom"); // create a chemistry student ChemStudent s2 = new ChemStudent("Dick"); // fill the student body with studs stud[0] = s0; stud[1] = s1; // compiler complains that it can't find symbol getMajor on next line System.out.println("major: " + stud[0].getMajor() ); // doesn't compile; System.out.println("major: " + s0.getMajor() ); // works: compiles and runs correctly } }

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  • disable the Home Button and Back Button"

    - by michael
    i want way to disable the Home Button & Back Button when click on checkbox in application , my application on version 4.2.2 i have code but not work when click on checkbox work stop to application public void HardButtonOnClick(View v) { boolean checked1 = ((CheckBox) v).isChecked(); if(checked1) { SQLiteDatabase db; db = openOrCreateDatabase("Saftey.db", SQLiteDatabase.CREATE_IF_NECESSARY, null); db.setVersion(1); db.setLocale(Locale.getDefault()); db.setLockingEnabled(true); ContentValues values = new ContentValues(); values.put("hardBtn", "YES"); db.update("Setting", values, "id = ?", new String[] { "1" }); Toast.makeText(this, "Hard Button Locked", Toast.LENGTH_LONG).show(); //SharedPreferences pref = getSharedPreferences("pref",0); //SharedPreferences.Editor edit = pref.edit(); //edit.putString("hard","yes"); //edit.commit(); /* String Lock="yes" ; Bundle bundle = new Bundle(); bundle.putString("key", Lock); Intent a = new Intent(Change_setting.this, ChildMode.class); a.putExtras(bundle); startActivity(a);*/ super.onAttachedToWindow(); this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); isLock = true; } else { SQLiteDatabase db; db = openOrCreateDatabase("Saftey.db", SQLiteDatabase.CREATE_IF_NECESSARY, null); db.setVersion(1); db.setLocale(Locale.getDefault()); db.setLockingEnabled(true); ContentValues values = new ContentValues(); values.put("hardBtn", "NO"); db.update("Setting", values, "id = ?", new String[] { "1" }); //SharedPreferences pref = getSharedPreferences("pref",0); //SharedPreferences.Editor edit = pref.edit(); //edit.putString("hard","no"); //edit.commit(); Toast.makeText(this, "Hard Button Un-Locked", Toast.LENGTH_LONG).show(); isLock = false; } } how can work it??

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  • How to use a photo that has just been uploaded to Tomcat v6?

    - by Zombie_Colonel
    In an android application a user can upload a picture to a Tomcat server v6 in (Projet\WebContent\images) A second user can come at the same time display the picture thing not work it shows me: The requested resource is not available. I did what? I have to reboot the server? refresh? in a PHP page I upload pictures and then they are simply viewed by the user, for cons there I find difficulty with JEE

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  • Getting hold of a reference to the object created by JOptionPane static methods

    - by user548240
    Hi, I wonder if it is possible to get hold of a reference to the (JDialog?) object created by one of those static methods of JOptionPane (e.g. showMessageDialog)? I intend to modify the position where the dialog appears on the screen. More specifically, I want the dialog to appear at the top-left corner of the main app window, instead of the centre of the window by default. So having a reference to the object would enable me to use setLocation to achieve the desired effect... Any suggestion would be appreciated! Thanks!

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  • How can I configure a Hudson job to use a specific JDK?

    - by rewbs
    I have a number of projects running on a Hudson slave. I'd like one of them to run Ant under Java6, rather than the default (which is Java5 in my environment). In the project configuration view, I was hoping to find either: An explicit option allowing me to set a custom JDK location to use for this project. A way to set custom environment variables for this project, which would allow me to set JAVA_HOME to the JDK6 location. The would make Ant pick up and run on Java6 as desired. Is there a way to do either of the above? If one of those facilities is available, I can't see how to access it. I'm running on Hudson 1.285. I would rather avoid using an "execute shell" operation instead of the "invoke Ant" operation if possible: my slave is on z/OS and Hudson doesn't seem to create the temporary shell scripts properly on this platform (probably an encoding issue).

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  • PreparedStatement.setString() method without quotes

    - by Slavko
    I'm trying to use a PreparedStatement with code similar to this: SELECT * FROM ? WHERE name = ? Obviously, what happens when I use setString() to set the table and name field is this: SELECT * FROM 'my_table' WHERE name = 'whatever' and the query doesn't work. Is there a way to set the String without quotes so the line looks like this: SELECT * FROM my_table WHERE name = 'whatever' or should I just give it up and use the regular Statement instead (the arguments come from another part of the system, neither of those is entered by a user)?

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  • Problem using FormLayout in Swing

    - by Dimitri
    Hi I am using the FormLayout. I just discovered it and it's powerful layout manager. I would like to layout 4 components (outlined, properties, tgraph, library) in 3 columns. I want to layout my library component on top of the outlined component in one column, the graph and the properties component in one column. But it doesn't work. Maybe I miss something. Here is my code : private void layoutComponent() { JPanel panel = new JPanel(); FormLayout layout = new FormLayout( "right:p,10dlu,300dlu,left:max(50dlu;p)", "top:pref,center:p,p"); layout.setRowGroups(new int[][]{{1,3}}); PanelBuilder builder = new PanelBuilder(layout,panel); builder.setDefaultDialogBorder(); CellConstraints constraints = new CellConstraints(); builder.add(library, constraints.xy(1, 1)); builder.add(outline,constraints.xy(1, 3)); builder.add(tgraph,constraints.xy(3, 1)); builder.add(properties,constraints.xy(4, 1)); getContentPane().add(panel);r code here } Can someone help plz. Thx :)

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  • resizing a ImageIcon in a JButton

    - by Tony
    I am creating a JButton which includes a specific ImageIcon. The main issue is that the original icon size is much bigger than the button size. As result when the button is displayed, only part of the icon can be seen. What is the method that "resize" an ImageIcon i n order to make it fit inside a JButton?

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  • Move the position in JEditorPane

    - by Joe
    Hi, I've a JEditorPane inside a JDialog. I'm loading a web page when this JDialog is loading. This web page is larger then the JEditorPane size. So I want to display a certain position in the web page by default. For example, I've a 175x200 size jdialog and JEditorPane. I want to display the web page sontent around 150 pixels down. Is there any solutions for this? Or is there any other component which I can used to display web pages and can move to a certain position of the web page at loading time.

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  • Advice on creating simple web service

    - by London
    Hi all, I want to build simple SOAP web service. So far I've only worked with existing SOAP/Rest services. And now I'd like to create my own, simple one for starters. For example create simple hello + string web service where I provide the string in request from SOAP ui or similar tool. I have Jboss server installed already, what is the "simplest" possible way to achieve this? I realize I need interface, interfaceImpl, and a wsdl file(generated possibly). Does anyone have some useful advice for me ? thank you

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  • OPENGL Android getting the coordinates of my image

    - by Debopam
    I used the codes from the following the website. And it helped a lot to draw the required object on my screen. But the problem I am facing is getting the coordinates of my object. Let me explain. According to the code. You just need to add your graphic images in PNG format and refer it to the class here. What I am trying to achieve is a simple collision detection mechanism. I have added a maze (as PNG). And have a object (as PNG) to go through the blank path within the maze. In order to do this I need to know the blank spaces within the coordinates through which my object will move. Can any one tell me how to get the blank spaces as (x,y) coordinates through which I can take my object?

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  • updating a properties file in a web application

    - by AmiraGL
    i have a properties file (under rsources folder) in which i'm stocking a variable (key=value), i need to update it when a user insert a new value or update the older one , so can i do it ? i have doubts because it's a web application so it' simply a war deployed in the server so how it is possible to access the .properties file and change it directly from the code . if it's not possible is there another solution ? Any Help will be apprecited Many thanks

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  • How to add clear option to this whiteboard?

    - by swift
    i have to add clear screen option to my whiteboard application, usual procedure is to draw a fill rect to the sizeof the image. But in my app i have transparent panels added one above the other i.e as layers, if i follow the usual procedure the drawing from the underlying panel wont be visible. please tell me any logic to do this. public void createFrame() { JFrame frame = new JFrame(); JLayeredPane layerpane=frame.getLayeredPane(); board= new Whiteboard(client); //board is a transparent panel // tranparent image: board.image = new BufferedImage(590,690, BufferedImage.TYPE_INT_ARGB); board.setBounds(74,23,590,690); board.setImage(image); virtualboard.setImage(image); //virtualboardboard is a transparent panel virtualboard.setBounds(74,23,590,690); JPanel background=new JPanel(); background.setBackground(Color.white); background.setBounds(74,25,590,685); layerpane.add(board,new Integer(5)); layerpane.add(virtualboard,new Integer(4));//Panel where remote user draws layerpane.add(background,new Integer(3)); layerpane.add(board.colourButtons(),new Integer(2)); layerpane.add(board.shapeButtons(),new Integer(1)); layerpane.add(board.createEmptyPanel(),new Integer(0)); }

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