ABout Exception

Hello,
Why it did not throw an exception?
void mymethod() throws Exception()
int x = 1;
if (x == 0)
throw new Exception();
try{
x = 0;
catch(Exception e)
System.out.println(e);
}

Why it did not throw an exception?Why did you think it should ?
void mymethod() throws Exception()
   int x = 1;
   // x is NOT equal to zero
   if (x == 0)
      // SO this is not executed
      throw new Exception();
   try{
      // x is assigned to zero
      x = 0;
      // But there is no reason to throw an exception
   } catch(Exception e) {
      // So this code is never executed.
      System.out.println(e);
}You have misunderstood something (possibly two or three things) about exceptions.

Similar Messages

  • How to get details about Exception catched in Exception branch of the Block

    Hello Experts,
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    Hey,
          the message from the exception can be utilized by using alerts(in order to mail,sms r fax). but otherwise its not possible using mappings or container.
    check this link for alert configuration.
    /people/michal.krawczyk2/blog/2005/09/09/xi-alerts--step-by-step

  • About Exceptions in business object

    Hi all,
    could anyone please brief me about exceptions in business objects and how can we create them their.
    i have tried to search also  but haven't found any satisfactory solution.
    regards
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    Exception in business objects are baiscally 3 types :Temporary, Application and system exception.
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  • Lack info about Exception

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  • Confused about Exception Aggregation

    Gurus-
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    Hi,
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    According to your requirement now you need this in seperate column so make a new formula and use Sumct(value).
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    For more information on the same read the below links.
    http://help.sap.com/saphelp_nw70/helpdata/en/45/6148bab9ac1deee10000000a155369/content.htm
    http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/007ba7a0-bcea-2b10-7e89-cbcb9db98a28
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    Regards,
    AL
    Edited by: AL1112 on Dec 30, 2011 5:38 AM

  • Notify user about Exception in BPM

    Hi
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  • Question about Exception Error

    I'm writing a small PBE program for a class project and I keep getting an InvalidKeySpecException that claims my char[ ] is not ASCII. Now I am under the impression that when a char value is entered it's in ASCII values... I've only put up a piece of my code, if needed I can put up the rest, it's fairly simple and easy to follow.
    here is my terminal output (with a number of debug outputs):
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    Getting Password
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    Creating PBEParameterSpec
    setParams entered
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    Done getting param
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    Creating SecretKey
    createKey Entered
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    InvalidKeySpecException: Password is not ASCII
    java.security.spec.InvalidKeySpecException: Password is not ASCII
         at com.sun.crypto.provider.PBEKey.<init>(DashoA6275)
         at com.sun.crypto.provider.PBEKeyFactory.engineGenerateSecret(DashoA6275)
         at javax.crypto.SecretKeyFactory.generateSecret(DashoA6275)
         at Cryptography.createKey(Cryptography.java:141)
         at Cryptography.main(Cryptography.java:265)
         at __SHELL3.run(__SHELL3.java:7)
         at bluej.runtime.ExecServer.vmSuspend(ExecServer.java:178)
         at bluej.runtime.ExecServer.main(ExecServer.java:143)
    java.security.spec.InvalidKeySpecException: Password is not ASCII
         at com.sun.crypto.provider.PBEKey.<init>(DashoA6275)
         at com.sun.crypto.provider.PBEKeyFactory.engineGenerateSecret(DashoA6275)
         at javax.crypto.SecretKeyFactory.generateSecret(DashoA6275)
         at Cryptography.createKey(Cryptography.java:141)
         at Cryptography.main(Cryptography.java:265)
         at __SHELL4.run(__SHELL4.java:7)
         at bluej.runtime.ExecServer.vmSuspend(ExecServer.java:178)
         at bluej.runtime.ExecServer.main(ExecServer.java:143)
    here is my code to get the char array input:
        private char[] getPass () throws IOException{
            System.out.println("Input password (32 character max):");
            char[] holder = new char[maxChar];
            int holdspot=0;
            while ((holder[holdspot++] = (char) System.in.read()) != '\n') {};
            //Debug
            System.out.println("Holdspot is: "+holdspot);
            //End Debug
            char[] pass = new char[holdspot];
            System.arraycopy (holder, 0, pass, 0, holdspot);
            //clear our holder array
            for (int i=0; i<holder.length;i++){
                holder=0;
    //Debug
    System.out.print("Pass: ");
    for (int i=0; i<holdspot;i++){
    System.out.print(pass[i]);
    System.out.print("\n");
    System.out.print("Holder: ");
    for (int i=0; i<holder.length;i++){
    System.out.print(holder[i]);
    System.out.print("\n");
    //End Debug
    //Comment back in for final version, screen clear
    //System.out.flush();
    return (pass);
    here is my code at the point where the exception is thrown:
        private SecretKey createKey(PBEKeySpec keySpec)
        throws NoSuchAlgorithmException, InvalidKeyException, InvalidKeySpecException{
            //Debug
            System.out.println("createKey Entered");
            char[] L = keySpec.getPassword();
            System.out.print("My keySpec value is: ");
             for (int i=0; i<L.length;i++){
                System.out.print(L);
    //End Debug
    SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey secKey = keyFac.generateSecret(keySpec);
    return (secKey);

    OK, got to Eclipse and reproduced the problem using your code.
    Something about the way you were reading your password bugged me. I changed your code a bit to the following:import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.security.InvalidKeyException;
    import java.security.NoSuchAlgorithmException;
    import java.security.spec.InvalidKeySpecException;
    import javax.crypto.SecretKey;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.PBEKeySpec;
    public class PBETest {
      static final int MAX_CHAR = 32;
      private char[] getPass() throws IOException {
        System.out.print("Input password ("+MAX_CHAR+" character max):");
        String s = new BufferedReader(new InputStreamReader(System.in)).readLine();
        char[] holder = s.toCharArray();
        int holdspot = (s.length()>MAX_CHAR?MAX_CHAR:s.length());
        //End Debug
        char[] pass = new char[holdspot];
        System.arraycopy(holder, 0, pass, 0, holdspot);
        //clear our holder array
        for (int i = 0; i < holder.length; i++) {
          holder[i] = 0;
        //Debug
        System.out.print("Pass: ");
        for (int i = 0; i < holdspot; i++) {
          System.out.print(pass);
    System.out.print("\n");
    System.out.print("Holder: ");
    for (int i = 0; i < holder.length; i++) {
    System.out.print(holder[i]);
    System.out.print("\n");
    //End Debug
    //Comment back in for final version, screen clear
    //System.out.flush();
    return (pass);
    private SecretKey createKey(PBEKeySpec keySpec)
    throws NoSuchAlgorithmException, InvalidKeyException,
    InvalidKeySpecException {
    //Debug
    System.out.println("createKey Entered");
    char[] L = keySpec.getPassword();
    System.out.print("My keySpec value is: ");
    for (int i = 0; i < L.length; i++) {
    System.out.print(L[i]);
    //End Debug
    SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey secKey = keyFac.generateSecret(keySpec);
    return (secKey);
    public static void main(String[] args) {
    try {
    PBETest ptest = new PBETest();
    char[] pwd = ptest.getPass();
    PBEKeySpec spec = new PBEKeySpec(pwd);
    SecretKey sk = ptest.createKey(spec);
    } catch (Exception e) {
    e.printStackTrace();
    }And now it works.
    I don't know exactly why your "one char at a time from System.in" bugged me, and I don't know exactly why it didn't work - but that was the problem.
    Grant

  • Doubt about exceptions.

    hai,
    here there is user eit function module.
    call customer-function '014'
    exporting
    is_header          = is_caufvd
    is_component       = cs_resbd_new
    is_component_old   = is_resbd_old
    is_materialview    = is_msfcv
    i_fcode            = c_fcode
    i_marked           = c_flg_sel
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    tell me what is main use of exception.
    some fm there is more than one exceptions is there?
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    Hi,
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    regards,
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  • Where can I find information about exceptions and errors?

    I'm new to Java and sometimes run into errors that I don't understand. Is there a list of common errors somewhere that I could look at to at least get a general idea of what's causing my problem?
    for instance:
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    java.lang.NullPointerException
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         at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
         at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
         at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
         at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
         at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
         at java.awt.Component.processMouseEvent(Component.java:5100)
         at java.awt.Component.processEvent(Component.java:4897)
         at java.awt.Container.processEvent(Container.java:1569)
         at java.awt.Component.dispatchEventImpl(Component.java:3615)
         at java.awt.Container.dispatchEventImpl(Container.java:1627)
         at java.awt.Component.dispatchEvent(Component.java:3477)
         at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
         at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
         at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
         at java.awt.Container.dispatchEventImpl(Container.java:1613)
         at java.awt.Window.dispatchEventImpl(Window.java:1606)
         at java.awt.Component.dispatchEvent(Component.java:3477)
         at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
         at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
         at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
         at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
         at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
         at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
    I'm not asking for anyone to solve this for me. It's critical that I learn how to troubleshoot and figure out a solution. I was just wondering if there was a site or link on the web that generally discusses what these (and other) errors mean. Or if anybody could tell me what they mean?

    The Java API documentation is the first place to look. Each exception or error is a class. For instance, information on java.lang.NullPointerException is in the API for the java.lang package, toward the bottom.
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  • Problem about "Exception in thread "main" java.lang.NullPointerException"

    This is t error message once i run the file
    Exception in thread "main" java.lang.NullPointerException
    at sendInterface.<init>(sendInterface.java:64)
    at sendInterface.main(sendInterface.java:133)
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    * @author
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    import javax.swing.Icon;
    import javax.swing.ImageIcon;
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    import javax.swing.JButton;
    import javax.swing.JLabel;
    import javax.swing.JList;
    import javax.swing.JRadioButton;
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    import javax.swing.ListModel;
    import javax.swing.UIManager;
    import javax.swing.SwingConstants;
    import java.io.*;
    import java.sql.*;
    import java.net.*;
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         private Panel topPanel;
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         private Panel sendFilePanel;
         private JLabel senderID;
         private JLabel receiverID;
         private JLabel senderDisplay;
         private DefaultListModel receiverListModel = new DefaultListModel();
         private JList receiverID_lst = new JList(receiverListModel);
         private JRadioButton sendType;
         String userName;
         String[] userList = null ;
         int i=0;
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        public sendInterface() {
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                     JFrame.setDefaultLookAndFeelDecorated( true );
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               System.err.println( "Look and feel not set." );
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             topPanel.setLayout( new GridLayout( 2 , 1 ) );                          //line 64*************************
             senderID = new JLabel( "Sender:", SwingConstants.LEFT );
             senderDisplay = new JLabel( "'+...+'", SwingConstants.LEFT );
             receiverID = new JLabel( "Receiver:", SwingConstants.LEFT);
    //         receiverID_lst = new JList( ListName );
              frame.add(senderID);
             frame.add(senderDisplay);
             frame.add(receiverID);
    //         frame.add(receiverListModel);
             frame.add(new JScrollPane(receiverID_lst), BorderLayout.CENTER);
             frame.setLocation(200, 200);
             frame.setSize(250, 90);
             frame.setVisible(true);
        public void setListName(String user)
             try{
                  userName = user;
                  Class.forName("com.mysql.jdbc.Driver");
                   String url = "jdbc:mysql://localhost:3306/thesis";
                   con = DriverManager.getConnection(url, "root", "");
                   Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
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                   while(rs.next()){
                      String user_id = rs.getString("User_ID");
                      System.out.println("\tuser_id= " + user_id );
         //             receiverListModel.addElement(user_id);
                        userList=user_id;
                        i++;
              }//end while loop
              receiverListModel.addElement(userList);
         catch(Exception ex)
    ex.printStackTrace();
         finally
    if (con != null)
    try
    con.close ();
    System.out.println ("Database connection terminated");
    catch (Exception e) { /* ignore close errors */ }
    public String getUserName()
         return userName;
    public String[] getUserList()
         return userList;
    public static void main(String[] args) {
    new sendInterface(); //line 133******************************************
    thank ur reply:D
    Edited by: ocibala on Aug 3, 2008 9:54 AM                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

    And where do you instantiate topPanel before you invoke setLayout?
    db

  • Forms question  about exceptions

    Hello,
    I am a newbie and hence my question may find very basic, please help me.
    I have a Pl/sql code where I am executing a queryand if the query doesn't retrieve any values I need to show a message.
    My code is something like this:
    select id from table into tmpid where id=:val_id
    some code here
    CALL_form(url);
    If the query fails I need to show a message, how can I do this. Forgive me for my knowledge in forms, as I am a newbie.
    Thanks in advance.
    Newbie

    Declare
      Found1  varchar2(1);
    Begin
      ...whatever code you need here...
      begin
        select 'Y' into Found1
          from table where id=:val_id;
        exception when no_data_found then null;
      end;
      If Found1 is null then
        Message('No can do!!!');
        Raise form_trigger_failure;
      End if;
      ...some code here...
      Call_form(url);
    End;

  • About exception class CX_TPDA_SYS_SYMB_FSUNASSIGNED

    Can any tell me how to use this exception class.
    I try to use this exception class to catch unassign exception when using field symbol. But failed.Is there a way to catch unassign exception of field symbol?
    Thanks
    DATA: int TYPE I.
    FIELD-SYMBOL: <int> TYPE I.
    DATA: r_exception TYPE REF TO CX_TPDA_SYS_SYMB_FSUNASSIGNED.
    TRY.
      <int> = 1.
      CATCH CX_TPDA_SYS_SYMB_FSUNASSIGNED INTO r_exception.
    ENDTRA.
    When execute <int> = 1.ABAP dumps occurs.

    Hi Chris,
    it seems that the exception of using an unassigned field symbol is not catchable. I've tried out your example and replaced the class after CATCH statement with main exception class cx_root. Even cx_root is not able to catch this exception.
    I recommend that you avoid this situation by using code like this:
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    ELSE.
    RAISE EXCEPTION your_exception.
    ENDIF.
    Hope this helps!
    Regards
    Mark-André

  • Question about exceptions in function module GUI_DOWNLOAD

    To all,
    I add the function module 'GUI_DOWNLOAD' in the ABAP report program. After the user download the data to excel, the program also displays a report on the screen for print output.
    If the user keep the excel file open and tries to replace the file on download, the program gives an error message 'Access to file denied' and the program ends without displaying a report on the screen.
    Is there any way not to end the program even if download is failed?
    I would like the program displays a report after it gives an error message.
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    Thank you very much in advance.
    Best regards,
    Miki Komatsu

     I figured out how to do that.
      Thanks.
      Best regards,
      Miki

  • Question about Exception!

    class A
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    class B extends A
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    throw AnotherException;
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    Why did the designer design the less exception throwwing rules?
    Thanks

    class MyFirstException extends Exception {}
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    class A {
      public void f() throws MyFirstException { ... }
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      public void f() throws MySecondException { ... }
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    A a = new B();
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  • Question about Exception stack

    Hello,
    I get the following exception stack and it is not the first time that I get this "ClassName.<init>".
    What does the "init" mean?
    Thanks in advance,
    Balteo.
    oracle.xquery.XQException:  Too many arguments for function compare
         [java]      at oracle.xquery.PreparedXQuery.<init>(PreparedXQuery.java:63)
         [java]      at oracle.xquery.XQueryContext.prepareXQuery(XQueryContext.java:140)
         [java]      at com.agilience.sharenet.app.sgbdo.PPersistenceOracle.executeQuery(PPersistenceOracle.java:214)
         [java]      at com.agilience.sharenet.app.sgbdo.PPersistenceOracle.getAnonymousId(PPersistenceOracle.java:369)
         [java]      at com.agilience.sharenet.app.bl.persistence.PPersistenceModel.getAnonymousId(PPersistenceModel.java:112)

    When an exception occurs inside the constructor for the class, the stack trace refers to the constructor as <init>. <init> is the internal name that java uses to refer to constructors for a class.

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