f. nikita thomas

thanks, i already went to that site and had some difficult at first until i read the java api on the URI class. i have a working program, however it's proprietary in its implementation<in other words not for me...>. once i understand saxon a little better, i'll post what i've learned with relevant comments. i have to get to work and school so ...

Hey,
basically i have (2) files generated from a transformation and would like to run another transformation with them before they are written. i have made little headway with this so i have some general questions if anyone could answer:


1) if i'm not mistaken, the class automatically finds any xsl:result-document elements and does(?) ...

2) should i be using the static method StandardOutputResolver.resolve() for anything?

3) does anyone have an example of using the class correctly, because i've googled myself silly and there is nothing...

thanks in advance

Have you not been given a database already set up?

nope. i am forced to use the set up that my tutee's instructor has given them<no database, write schema?,code java>. the following is directly from their assignment :

Id – unique identifier identifying exactly one physical book // primary key ISBN – book isbn number Author – name of the Author of the book Title – title of the book Book Classification Id – foreign key of Book Classification table entry //foreign key Copyright Date – when was the book copyrighted Availability – is the book available or not

Id – unique identifier identifying exactly one registered member // primary key Name – members name Late Fee Balance – member outstanding late fee balance Books – the books this member has checked out at a point in time // foreign key???

Id – unique identifier identifying exactly one Book Classification Classification Name – book classification name or description (i.e. fiction, non-fiction, etc...)

this essentially setups a one to many relationship(member to # of book(s))... i think, and this is where i'm getting frustrated. the last clue that he gave them is :

For the java classes there are two interesting relationships between objects that I want to see if you understand. One is the relationship between a library member and the books that member has checked out. The other is the relationship between a book and it's book classification.

i wouldn't mind this so much if i had already taken sql and these weren't cobol programmers for the state . so again, how do i approach the instance of a member with multiple books? does it have something to do with the foreign key? should the Books field in member be a foreign key? btw, considering my knowledge of sql(none), i'm surprised that i've gotten this far in so short a time.

hey,
i haven't taken sql yet and i'm having some trouble getting some concepts straight. i have a tables with foreign keys that emulate a library(book, member,book classification). i can populate the database fairly easy; my problem is this- what if a member has more than one book? is there a query that allows this since the bookID is a foreign key in the member table? should (or can i) insert the bookID(s)-plural- into the member table at creation time? lastly and most importantly can a record hold more than one foreign key in the same field? i wouldn't ask but all the sources i've read by googling do not go in depth in theory. the following code works; it is here to provide the database structure. any help, especially with the concept questions will be greatly appreciated.

import java.sql.*; import java.io.FileReader; import java.io.IOException; import java.io.BufferedReader; import java.util.GregorianCalendar; import java.io.FileNotFoundException; public class LibraryDataBase { public static void main(String[] args) throws IOException, FileNotFoundException { Connection con; PreparedStatement ps = null; BufferedReader br = new BufferedReader(new FileReader("classification.dat")); String [] sa = new String[2]; String s = null; try{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); } catch(ClassNotFoundException e){e.printStackTrace();} try{ con = DriverManager.getConnection("jdbc:odbc:library","",""); ps = con.prepareStatement("create table class(classID int primary key,\"Classification Name\" varchar(5))"); ps.executeUpdate(); while((s = br.readLine())!= null){ sa = s.split(":"); ps = con.prepareStatement("insert into class values(?,?)"); ps.setInt(1,Integer.parseInt(sa[0])); ps.setString(2,sa[1]); ps.executeUpdate(); } ps = con.prepareStatement("create table book(bookID int primary key, ISBN varchar(30), Author varchar(40)," +"Title varchar(40),classID int,\"Copyright Date\" date, \"Availability\" bit," +"constraint fkbookclassID foreign key (classID) references class)"); ps.executeUpdate(); sa = new String[8]; br = new BufferedReader(new FileReader("books.dat")); while((s = br.readLine())!= null){ sa = s.split(":"); ps = con.prepareStatement("insert into book(bookId,ISBN,Author,Title,\"Copyright Date\",Availability)" +"values(?,?,?,?,?,?)"); ps.setInt(1,Integer.parseInt(sa[0])); ps.setString(2,sa[1]); ps.setString(3,sa[2]); ps.setString(4,sa[3]);//@ todo ps.setDate(5, new java.sql.Date(new GregorianCalendar(Integer.parseInt(sa[4]),Integer.parseInt(sa[5]), Integer.parseInt(sa[6])).getTimeInMillis())); ps.setBoolean(6, Boolean.parseBoolean(sa[7])); ps.executeUpdate(); } ps = con.prepareStatement("create table member(memberID int primary key, Name varchar(40)," +"\"Late Fee Balance\" double, bookID int," +"constraint fkmemberbookID foreign key (bookID) references book)"); ps.executeUpdate(); sa = new String[4]; br = new BufferedReader(new FileReader("members.dat")); while((s = br.readLine())!= null){ sa = s.split(":"); ps = con.prepareStatement("insert into member(memberId,Name,\"Late Fee Balance\") values(?,?,?)"); ps.setInt(1,Integer.parseInt(sa[0])); ps.setString(2,sa[1]); ps.setDouble(3, Double.parseDouble(sa[2])); ps.executeUpdate(); } ps.close(); con.close(); br.close(); } catch(SQLException e){e.printStackTrace();} } }

THANKS mike && varun. that was the solution(s) i needed. i read in another forum that this is the correct behavior as of 1.6. now i can handle it from here. thanks again && take care.

ps. nice use of the ActionListener(), mike

i added the following; still exhibits the same behavior. also setSelectedIndex() will not work for first item as well. any ideas?

sizes.setSelectedIndex(0); sizes.addItemListener(new ItemListener(){ public void itemStateChanged(ItemEvent e){ JComboBox temp = (JComboBox)e.getSource(); s = (String)temp.getSelectedItem(); System.out.println(s); cprice = 0.0; if(s.charAt(0)=='S'){ cprice = 7.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='M'){ cprice = 9.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='L'){ cprice = 11.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='E'){ cprice = 13.0; pricel.setText("$"+(cprice+lprice)); } } });

hey,
i'm having a problem with getting the first item in the JComboBox() being selected. i have to select another item before i'm able to select the first item and trigger it. i'm using 1.6 :

import java.awt.*; import javax.swing.*; import javax.swing.event.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class pizza extends JApplet { double lprice; double cprice; String s; JLabel pizza = new JLabel("PizzaCo.",JLabel.CENTER); JLabel pints = new JLabel("Choose the pizza size and choose as many toppings as you want",JLabel.CENTER); Font bigfont = new Font("Arial", Font.BOLD, 36); JPanel top = new JPanel(); JPanel middle = new JPanel(); JPanel bottom = new JPanel(); String[] size = {"Small - $7", "Medium - $9","Large - $11", "Extra Large - $13"}; JComboBox sizes = new JComboBox(size); String[] toppings = {"Eggplant", "Anchovies", "Hot Peppers", "Pepperoni", "Sausage", "Green Peppers", "Mushrooms"}; JList pizzat = new JList(toppings); JLabel pricel = new JLabel("$0.00"); Container c; BorderLayout border = new BorderLayout(); GridLayout grid = new GridLayout(0,1); public void init() { c = getContentPane(); c.setLayout(new BorderLayout()); c.setBackground(Color.cyan); setSize(new Dimension(700,450)); pizza.setForeground(Color.red); pizza.setFont(bigfont); pints.setForeground(Color.blue); top.setLayout(new GridLayout(2,0)); top.add(pizza); top.add(pints); c.add(top, BorderLayout.NORTH); middle.setLayout(new GridLayout(0,2)); middle.add(sizes); middle.add(pizzat); c.add(middle, BorderLayout.CENTER); bottom.add(pricel); c.add(bottom,BorderLayout.SOUTH); sizes.setEditable(false); sizes.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JComboBox temp = (JComboBox)e.getSource(); s = (String)temp.getSelectedItem(); System.out.println(s); cprice = 0.0; if(s.charAt(0)=='S'){ cprice = 7.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='M'){ cprice = 9.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='L'){ cprice = 11.0; pricel.setText("$"+(cprice+lprice)); } if(s.charAt(0)=='E'){ cprice = 13.0; pricel.setText("$"+(cprice+lprice)); } } }); pizzat.addListSelectionListener(new ListSelectionListener(){ public void valueChanged(ListSelectionEvent e){ JList temp = (JList)e.getSource(); int i[] = temp.getSelectedIndices(); lprice = i.length; pricel.setText("$"+(cprice+lprice)); } }); } }

i never used JComboBox() before, so any help would be appreciated. thanks in advance.

and thank you Campbell. i've been looking for something akin to this article for awhile. googling gives such " ",<insert expletive>,results that knowing what is true or correct leaves you at best concerned and at worst implementing bad practices. i'm reading the article now and it's by far the most comprehensible i've seen. again, thank you. take care.

THANK YOU!

yes this is 'not' my code, this is someone i am helping. i really need to take him to the woodshed on his coding style and logic. thanks again. take care.

the problem is in panel1 the JCheckBox's are not visible. i "think" its a Layout issue...

hate to bother you again, but this is someone else's code and i haven't done this in awhile. the JCheckbox's in the first group are missing. thanks in advance.

import java.awt.Container; import java.awt.FlowLayout; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; import java.awt.event.*; public class TryWindow extends JFrame{ static JFrame aWindow = new JFrame("This is the Window Title "); static JPanel panel1 = new JPanel( new GridLayout(0,1) ); static JPanel panel2 = new JPanel(new GridLayout(0,1)); static JLabel label1 = new JLabel("Label 1"); //grid layout 0 row 1 column static JCheckBox cakeBox = new JCheckBox( "cake" ); static JCheckBox pieBox = new JCheckBox( "Pie" ); static JCheckBox riceBox = new JCheckBox( "Rice " ); static JRadioButton ribeye = new JRadioButton( "ribeye" ); public static void main(String[] args) { int windowWidth = 600; int windowHeight = 250; Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint(); // aWindow.setBounds(400,400,windowWidth,windowHeight); aWindow.setBounds(center.x-windowWidth/2,center.y-windowHeight, windowWidth,windowHeight); aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); panel1.setBorder( BorderFactory.createTitledBorder( "Button group 1" ) ); /* panel2.setBorder( BorderFactory.createTitledBorder( "Button group 2" ) ); */ panel1.add(cakeBox); panel1.add(riceBox); panel1.add(pieBox); panel1.add(label1); JButton button1 = new JButton("Click Me"); //panel1.add(button1); // ButtonGroup bg = new ButtonGroup(); // bg.add( ribeye ); // ribeye.addItemListener(this); button1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JButton r = (JButton)e.getSource(); r.setText("clicked"); } }); panel2.setBorder(BorderFactory.createTitledBorder("Here")); //panel1.add(button1); panel2.add(cakeBox); panel2.add(riceBox); panel2.add(pieBox); aWindow.setLayout(new GridLayout(0,2)); // Container cp = getContentPane(); aWindow.add(panel1); aWindow.add(panel2); aWindow.setVisible(true); } }

thanks Rob. how do i override hashCode() correctly?

public boolean equals(Object obj){ if(obj == this) return true; if(obj == null) return false; if(!(getClass() == obj.getClass())) return false; else return (this.i == ((Reference)obj).i) &&(this.name.equals(((Reference)obj).name)) &&this.r==((Reference)obj).r; }
silly me, that wasn't the talking end...

i'm trying to check the Reference class for equality...
public class Reference { int i; String name = null; Reference r = null; public Reference(int i,String name,Reference r){ this.i = i; this.name = name; this.r = r; } public boolean equals(Object obj){ if(obj == this) return true; if(obj == null) return false; if(!(getClass() == obj.getClass())) return false; else return (this.i == ((Reference)obj).i) &&(this.name.equals(((Reference)obj).name)); } }

but when i check...
public class RefCheck { public static void main(String[] args) { Reference t = new Reference(5,"james",null); Reference r0 = new Reference(5,"james",null); Reference s = new Reference(5,"james",t); String x = "willy"; String y = "willy"; String i = "wally"; String j = "wi"; j+="lly"; System.out.println(x==y); System.out.println(x==i); System.out.println(x==j); System.out.println(r0.equals(s)); System.out.println(r0.equals(t)); System.out.println(r0.equals(r0)); } }

i get this...
true false false true true true

shouldn't r0.equals(s) return false? what is the correct way to check for reference equality in a class? any help will be greatly appreciated. thanks in advance.

Steve Luke wrote:for(inner=outer+1;inner<numbers.length;inner++){ if(numbers[inner].compareTo(numbers[minimum]) >< 0) minimum=inner; swap(outer,inner);

You are swapping the inner and outer value un-conditionally. So you are effectively shuffling the numbers but are not sorting them. I assume you want to only swap the values if the condition is met. I am also not convinced you are comparing the correct values (inner with minimum then resetting minimum). I think you can drop the use of minimum all together...

Umm, okay the "><" was a copy paste botch, this is illegal in java, try it. it should only be : "<" since compareTo() returns less than 0 if the Strings are not equal. this code is adapted from Robert LaFore. so if you have another algorithm that works with Strings i'd be more than glad to use it ... i already had to edit the previous post so hopefully this will go through okay.