Put strings into a Vector
Does anyone know how to put strings into a vector here is my code to put some names of files into one.
Vector machines = new Vector();
String dir = "F:\\APPS\\SPCII\\DATA\\";
File directory = new File(dir);
machines.addElement (directory.list());
But when I print the vector, it only prints the address.
Thanks
list() returns a String[] array. if you store it in an array, say
String[] dirlist=directory.list(); you can use dirlist.length and a for loop to enter the elements of the array one by one into the vector
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Put database result set into a vector?
I have a resultset rs I would like to put into a vector but I don't seem to get something fundamental. I can put individual items in with add() for instance but how do I dump a whole result set in there...
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Any general advice would be appreciated, I've read a lot about Vectors today and have ended up more confused than I'd have expected. So I have come to seek some basic advice.
private static void showResult (ResultSet rs) throws SQLException {
Vector vector = new Vector();
try
// rs is the resultset output from a database
vector.addAll(rs);
catch(NullPointerException ex)
System.out.println("bugger - null pointer exception");
System.out.println();
ex.printStackTrace();
}Iterate over the resultset, create your own object to store data for each row and add that object to the vector. There is no escape from this.
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How can I put a stl::vector string into the DB and then get it out?
Hello,
As the title, here's a test case with problems,but anyway you can still run it. ( VC6/XP-32/BDB 4.7 )
I know this may be wrong,and I'd like to know how can I do this.
Can someone help me please? I would appreciate it very much.
************ Copy,Compile and Run ***************
#include <iostream>
#include <vector>
#include "db_cxx.h"
int main()
std::string dbName("database.db");
u_int32_t db_flags=DB_CREATE;
Db* db=NULL;
// Prepare key(int)/data(vector<string>) pair.
int int_key=2;
std::vector<std::string> rec_data;
rec_data.push_back("apple");
rec_data.push_back("Bob");
rec_data.push_back("Me");
// Prepare Dbt for receiving.
std::vector<std::string> rec_readData;
Dbt readData;
readData.set_data(&rec_readData);
readData.set_ulen(sizeof(rec_readData));
readData.set_flags(DB_DBT_USERMEM);
try
// Open database.
db = new Db(NULL,0);
db->open(NULL,dbName.c_str(),NULL,DB_BTREE,db_flags,0);
// Put
int ret;
if(ret=db->put(NULL,new Dbt(&int_key,sizeof(int_key)),new Dbt(&rec_data,sizeof(rec_data)),DB_NOOVERWRITE)==0)
std::cout<<"put successful!"<<std::endl;
else { db->err(ret,"Db->put"); }
// Get
if(ret=db->get(NULL,new Dbt(&int_key,sizeof(int_key)),&readData,0)==0)
std::cout<<"get successful!"<<std::endl;
else { db->err(ret,"Db->get"); }
catch(DbException &e)
std::cerr<<"Error: ";
std::cerr<<e.what()<<std::endl;
// Close the database
try
if(db!=NULL)
db->close(0);
catch(DbException &e)
std::cerr<<"Error closing database: ";
std::cerr<<e.what()<<std::endl;
// Display the results.
// Index out of bounds. <-----
std::cout << rec_readData[0].c_str();
std::cout << rec_readData[1].c_str();
std::cout << rec_readData[2].c_str();
system("pause");
// Press any key to go wrong. :(
return 0;
Regards,
legendsinoYou need to convert the std::vector<std::string> into a sequence of bytes. For example, if all strings are shorter than 256 characters, you could create a fresh output string, iterator through the vector, and for each element, append the string length to the output string, followed by the string contents.
Note that ordering in the database will be different from lexicographic order, and you have to keep that in mind when performing range queries. -
Recordset putting into a vector
Hi. I have been struggling with this piece of code. What I am trying to do is, doing a "select all" query on a table and building a Category object from each record. Then I am putting each object into a vector and return the vector. But I keep getting a null pointer exceprion. Can anyone pls figure out whats wrong with this code?.
Thanks a lot.
private Vector doQuery(String sqlQuery)
Vector list=null;
Statement statement = null;
ResultSet resultSet = null;
Category c = new Category ();
try{
statement = trManager.getDBConnection().createStatement();
resultSet = statement.executeQuery(sqlQuery);
if(resultSet!=null)
while(resultSet.next())
int i =1;
c.setCategoryCode(resultSet.getString(i++));
c.setCategoryName(resultSet.getString(i++)); list.addElement(c);
catch(SQLException e)
System.out.println(e);
finally
trManager.closeResultSet(resultSet);
trManager.closeStatement(statement);
return list;what is the query that ou are executed
what is the no of rows expected from the query.
If it is too large then the possible cause for EOF
exception may be lack of memory/I doubt that this relates to OOM.... also the next() will not iterate over null returns so....
Please post corrected code and the excption stack for clarity... :) -
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How can i put a String into a byte array byte[]. So that i can send it to the serial port for output to an LCD display. Cheers David
javadocs for String
getBytes
public byte[] getBytes()
Encodes this String into a sequence of bytes using the platform's default charset, storing the result into a new byte array.
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Putting a Class Object into a Vector
HI all
I need to put a class object into another classes vector, then be able to read it and retrieve data.
I can put the object into the vector but all i seem to be able to retrieve is data like Account@2343c2.
Is this some sort of tag? How do i get to the data?
thankz
joeyThat's what you get when you print an object which does not have its own toString() method to do anything different - it picks up the Object class's toString method instead. For example:
System.out.println(new Object());It sounds like you're doing something like this:
Vector v = new Vector();
v.add(new Account(42));If you were to do the following, you would see that sort of output:
System.out.println(v.get(0));The appropriate way to do this would be something like the following:
// Use a List reference instead of a Vector reference, and create
// an ArrayList object in preference to a Vector object
List list = new ArrayList();
list.add(new Account(42));
// Iterate through the list of accounts - use an
// iterator because this prevents off-by-one errors
// that arise with direct indexing.
Iterator i = list.iterator();
while(i.hasNext()) {
// Cast the reference returned by the iterator from
// Object to Account so that we can call account-specific
// methods.
Account current = (Account)i.next();
// Call the method specific to the Account class (getBalance
// is just an example that I made up).
System.out.println(current.getBalance());
} -
Putting characters in a String into an ArrayList
I have a String that contains spaces, and I want to create an ArrayList that contains each character of the String as a single item in the list, whitespace omitted. For example, let's say I have a String as follows:
String text = "this is my text";Then I want to go through that text letter by letter, adding each letter (either as a char or String, it doesn't matter) to an ArrayList as a separate item, and ignoring spaces.
So my ArrayList would contain 12 items: t, h, i, s, i, s, m, y, t, e, x, and t.
How can I do this? Any help or suggestions would be greatly appreciated. Thanks!How do you iterate over the characters of aString?
String has a charAt method.
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Stri
ng.html
Put that into a for loop.Or you could use the String method that gives back an array of char and go from there. -
How to put String with html tags as it is into xml
I am using apache dom API to create xml from java.
I have a string with html tags in it .when I add the string to xml, its replacing all the "<"; with < and ">" with > I would like the html tags to look as it is instead of the > and & lt;. How can I acheive that
this is the code snippet of what I am doing
In java class
String titleString = "<font color=red>This Is an Example of a Red Subject</font>"
Document doc = new DocumentImpl();
Element root = doc.createElement("bulletin");
Element item = doc.createElement("title");
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In Xml it looks like below
<title><font color=red>This Is an Example of a Red Subject</font></title>
but I would like to have the xml like below
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Can you please suggest me whats the best way to acheive this.
I appreciate all your help
Thank you
SumaOne problem is that you don't understand escaping. If you re-read what you posted you'll see that what you say you get, and what you say you want, are identical. That's because you didn't escape one of the two properly. So your first step should be to find the section about escaping in Chapter 1 of your XML book and read it carefully. Figure out what you should have done here (yes, the same rules apply).
However, to attempt to answer what I think your question is: if you have a String which contains markup, and you want to convert that String to XML elements, then you have to feed the String into an XML parser. -
How can i write a string into a specified pos of a file?
How can i write a string into a specified pos of a file without read all file into ram and write the whole file again?
for example:
the content of file is:
name=123
state=456
i want to modify the value of name with 789
(write to file without read all file into ram)
How can i do it? thank youtake this as an idea. it actually does what i decribed above. you sure need to make some modifications so it works for your special need. If you use it and add any valuable code to it or find any bugs, please let me know.
import java.io.*;
import java.util.*;
* Copyright (c) 2002 Frank Fischer <[email protected]>
* All rights reserved. See the LICENSE for usage conditions
* ObjectProperties.java
* version 1.0, 2002-09-12
* author Frank Fischer <[email protected]>
public class ObjectProperties
// the seperator between the param-name and the value in the prooperties file
private static final String separator = "=";
// the vector where we put the arrays in
private Vector PropertiesSet;
// the array where we put the param/value pairs in
private String propvaluepair[][];
// the name of the object the properties file is for
public String ObjectPropertiesFileName;
// the path to the object'a properties file
public String ObjectPropertiesDir;
// reference to the properties file
public File PropertiesFile;
// sign for linebreak - depends on platforms
public static final String newline = System.getProperty("line.separator");
public ObjectProperties(String ObjectPropertiesFileName, String ObjectPropertiesDir, ObjectPropertiesManager ObjectPropertiesManager)
// System.out.println("Properties Objekt wird erzeugt: "+ObjectPropertiesFileName);
this.ObjectPropertiesFileName = ObjectPropertiesFileName;
this.ObjectPropertiesDir = ObjectPropertiesDir;
// reference to the properties file
PropertiesFile = new File(ObjectPropertiesDir+ObjectPropertiesFileName);
// vector to put the param/value pair-array in
PropertiesSet = new Vector();
// System.out.println("Properties File Backup wird erzeugt: "+name);
backup();
// System.out.println("Properties File wird eingelesen: "+PropertiesFile);
try
//opening stream to file for read operations
FileInputStream FileInput = new FileInputStream(PropertiesFile);
DataInputStream DataInput = new DataInputStream(FileInput);
String line = "";
//reading line after line of the properties file
while ((line = DataInput.readLine()) != null)
//just making sure there are no whitespaces at the beginng or end of the line
line = cutSpaces(line);
if (line.length() > 0)
//$ indicates a param-name
if (line.startsWith("$"))
// array to store a param/value pair in
propvaluepair = new String[1][2];
//get the param-name
String parameter = line.substring(1, line.indexOf(separator)-1);
//just making sure there are no whitespaces at the beginng or end of the variable
parameter = cutSpaces(parameter);
//get the value
String value = line.substring(line.indexOf(separator)+1, line.length());
//just making sure there are no whitespaces at the beginng or end of the variable
value = cutSpaces(value);
//put the param-name and the value into an array
propvaluepair[0][0] = parameter;
propvaluepair[0][1] = value;
// System.out.println("["+ObjectPropertiesFileName+"] key/value gefunden:"+parameter+";"+value);
//and finaly put the array into the vector
PropertiesSet.addElement(propvaluepair);
// error handlig
catch (IOException e)
System.out.println("ERROR occured while reading property file for: "+ObjectPropertiesFileName);
System.out.println("ERROR CODE: "+e);
// System.out.println("in ObjectProperties");
// function to be called to get the value of a specific paramater 'param'
// if the specific paramater is not found '-1' is returned to indicate that case
public String getParam(String param)
// the return value indicating that the param we are searching for is not found
String v = "-1";
// looking up the whole Vector
for (int i=0; i<PropertiesSet.size(); i++)
//the String i want to read the values in again
String s[][] = new String[1][2];
// trying to get out the array from the vector again
s = (String[][]) PropertiesSet.elementAt(i);
// comparing the param-name we're looking for with the param-name in the array we took out the vector at position i
if (s[0][0].equals(param) == true)
//if the param-names are the same, we look up the value and write it in the return variable
v = s[0][1];
// making sure the for loop ends
i = PropertiesSet.size();
// giving the value back to the calling procedure
return v;
// function to be called to set the value of a specific paramater 'param'
public void setParam(String param, String value)
// looking up the whole Vector for the specific param if existing or not
for (int i=0; i<PropertiesSet.size(); i++)
//the String i want to read the values in again
String s[][] = (String[][]) PropertiesSet.elementAt(i);
// comparing the param-name we're looking for with the param-name in the array we took out the vector at position i
if (s[0][0].equals(param) == true)
//if the param-names are the same, we remove the param/value pair so we can add the new pair later in
PropertiesSet.removeElementAt(i);
// making sure the for loop ends
i = PropertiesSet.size();
// if we land here, there is no such param in the Vector, either there was none form the beginng
// or there was one but we took it out.
// create a string array to place the param/value pair in
String n[][] = new String[1][2];
// add the param/value par
n[0][0] = param;
n[0][1] = value;
// add the string array to the vector
PropertiesSet.addElement(n);
// function to save all data in the Vector to the properties file
// must be done because properties might be changing while runtime
// and changes are just hold in memory while runntime
public void store()
backup();
String outtofile = "# file created/modified on "+createDate("-")+" "+createTime("-")+newline+newline;
try
//opening stream to file for write operations
FileOutputStream PropertiesFileOuput = new FileOutputStream(PropertiesFile);
DataOutputStream PropertiesDataOutput = new DataOutputStream(PropertiesFileOuput);
// looping over all param/value pairs in the vector
for (int i=0; i<PropertiesSet.size(); i++)
//the String i want to read the values in
String s[][] = new String[1][2];
// trying to get out the array from the vector again
s = (String[][]) PropertiesSet.elementAt(i);
String param = "$"+s[0][0];
String value = s[0][1];
outtofile += param+" = "+value+newline;
outtofile += newline+"#end of file"+newline;
try
PropertiesDataOutput.writeBytes(outtofile);
catch (IOException e)
System.out.println("ERROR while writing to Properties File: "+e);
catch (IOException e)
System.out.println("ERROR occured while writing to the property file for: "+ObjectPropertiesFileName);
System.out.println("ERROR CODE: "+e);
// sometimes before overwritting old value it's a good idea to backup old values
public void backup()
try
// reference to the original properties file
File OriginalFile = new File(ObjectPropertiesDir+ObjectPropertiesFileName);
File BackupFile = new File(ObjectPropertiesDir+"/backup/"+ObjectPropertiesFileName+".backup");
//opening stream to original file for read operations
FileInputStream OriginalFileInput = new FileInputStream(OriginalFile);
DataInputStream OriginalFileDataInput = new DataInputStream(OriginalFileInput);
//opening stream to backup file for write operations
FileOutputStream BackupFileOutput = new FileOutputStream(BackupFile);
DataOutputStream BackupFileDataOutput = new DataOutputStream(BackupFileOutput);
// String content = "";
String line = "";
// do till end of file
while ((line = OriginalFileDataInput.readLine()) != null)
BackupFileDataOutput.writeBytes(line+newline);
// error handlig
catch (IOException e)
System.out.println("ERROR occured while back up for property file: "+ObjectPropertiesFileName);
System.out.println("ERROR CODE: "+e);
System.out.println("this is a serious error - the server must be stopped");
private String cutSpaces(String s)
while (s.startsWith(" "))
s = s.substring(1, s.length());
while (s.endsWith(" "))
s = s.substring(0, s.length()-1);
return s;
public String createDate(String seperator)
Date datum = new Date();
String currentdatum = new String();
int year, month, date;
year = datum.getYear()+1900;
month = datum.getMonth()+1;
date = datum.getDate();
currentdatum = ""+year+seperator;
if (month < 10)
currentdatum = currentdatum+"0"+month+seperator;
else
currentdatum = currentdatum+month+seperator;
if (date < 10)
currentdatum = currentdatum+"0"+date;
else
currentdatum = currentdatum+date;
return currentdatum;
public String createTime(String seperator)
Date time = new Date();
String currenttime = new String();
int hours, minutes, seconds;
hours = time.getHours();
minutes = time.getMinutes();
seconds = time.getSeconds();
if (hours < 10)
currenttime = currenttime+"0"+hours+seperator;
else
currenttime = currenttime+hours+seperator;
if (minutes < 10)
currenttime = currenttime+"0"+minutes+seperator;
else
currenttime = currenttime+minutes+seperator;
if (seconds < 10)
currenttime = currenttime+"0"+seconds;
else
currenttime = currenttime+seconds;
return currenttime; -
Problem with String in a Vector
I'm making a small hangman game. And I got a problem with putting words in a Vector... This is the code... Can someone tell me what I'm doing wrong?
// First I define it.
Vector Words;
// Then add the words
Vector Words = new Vector();
Words.add(new String("HELLO"));
Words.add(new String("GOOD BYE"));
// When I try to get a string from the Vector I use this.
// The program compiles but when I try to run it I get NullPointerExeption here
W = (String) Words.elementAt(0);Not sure since I cant see all of your code but looks like this might be your problem:
// First I define it.
Vector Words; //<-- here you define a Vector named Words that is null
// Then add the words
Vector Words = new Vector(); //<-- here you define another vector named Words that holds a reference to a new Vector. This is a different reference than the one created above so you should probably remove the "Vector" part from the beginning of this line. Is this a local variable to a method and the one before is a global variable?
//Here you probably access the locally created Words vector which is initialized
Words.add(new String("HELLO"));
// When I try to get a string from the Vector I use this.
// The program compiles but when I try to run it I get NullPointerExeption here
W = (String) Words.elementAt(0); //<--and here my guess is that this statement is inside another method than the one with the local Words vector defined. Thus this one accesses the global Words Vector that is never initalized and is Null. And that gives you the NullPointerException.
So try changing the statement
Vector Words = new Vector();
to
Words = new Vector();
or just remove it totally and move the Vector creation to the place where you introduce the global variable.
Of course I might be totally wrong since I cant see all of your code but that is my guess.
Hope it helps,
-teka -
How to put graphics into a JViewport?
Hi,
I'm trying to make a simple game, where a block can move around in a 30x30 grid with collision detection. So far, it works alright, but I want the window to hold only 10x10 and for the block that is moving to stay at the center while the painted background moves around. The program reads a .dat file to get the world.
So is there a way to use the background world Ive painted and put it into a viewport so that it will scroll when the keys are hit to move? Also I'd like to make the block stay at the center of the screen, unless it's at a corner.
Hopefully this makes sense and someone can help. Thanks.
Here's my code:
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.io.*;
public class SmallWorld extends JPanel
implements KeyListener,
ActionListener {
//WORLD
String[][] worldArray = new String[30][30];
private static Color redBlock = new Color(255,0,0,255);
private static Color whiteBlock = new Color(255,255,255,150);
private static Color blackBlock = new Color(0,0,0,150);
boolean keyUP = false;
boolean keyDOWN = false;
boolean keyLEFT = false;
boolean keyRIGHT = false;
//Starting coordinates
int blockPositionX = 1;
int blockPositionY = 1;
JTextField typingArea;
JViewport viewable;
public SmallWorld() {
super( );
createWorld();
typingArea = new JTextField(20);
typingArea.addKeyListener(this);
typingArea.setEditable( false );
add(typingArea);
public void paintComponent(Graphics g) {
super.paintComponent(g);
String type = "";
for (int i = 0; i < 30; i++) {
for (int j = 0; j < 30; j++) {
type = worldArray[i][j];
if ( type.equals("1") )
g.setColor(redBlock);
g.fillRect( (j * 50),(i * 50),50,50 );
else {
g.setColor(whiteBlock);
g.fillRect( (j * 50),(i * 50),50,50 );
g.setColor(blackBlock);
g.fillRect( (blockPositionX * 50),(blockPositionY * 50),50,50 );
//Get the world from the DAT file and translate it into a 2d array to be used by paintComponent
public void createWorld() {
String getData = null;
int countRow = 0;
try {
FileReader fr = new FileReader("world.dat");
BufferedReader br = new BufferedReader(fr);
getData = new String();
while ((getData = br.readLine()) != null) {
if(countRow < 30) {
for (int i = 0; i < 30; i++) {
String temp = "" + getData.charAt(i);
worldArray[countRow] = temp;
countRow++;
} catch (IOException e) {
// catch possible io errors from readLine()
System.out.println("Uh oh, got an IOException error!");
e.printStackTrace();
//Move Block around the world
public void moveBlock() {
Graphics g = this.getGraphics();
Point pt = new Point();
pt.x = blockPositionX * 50;
pt.y = blockPositionY * 50;
if (keyUP) {
g.setColor(blackBlock);
g.fillRect( (blockPositionX * 50),(blockPositionY * 50),50,50 );
if (keyDOWN) {
g.setColor(blackBlock);
g.fillRect( (blockPositionX * 50),(blockPositionY * 50),50,50 );
if (keyLEFT) {
g.setColor(blackBlock);
g.fillRect( (blockPositionX * 50),(blockPositionY * 50),50,50 );
if (keyRIGHT) {
g.setColor(blackBlock);
g.fillRect( (blockPositionX * 50),(blockPositionY * 50),50,50 );
//check for collisions with blocks
public boolean checkCollision(int row, int col) {
if ( worldArray[col][row].equals("1") ) {
return true;
else {
return false;
//If key typed, put action here. none for now
public void keyTyped(KeyEvent e) {
/** Handle the key pressed event from the text field. */
public void keyPressed(KeyEvent e) {
updateView( e );
//If key released, put action here. none for now
public void keyReleased(KeyEvent e) {
/** Handle the button click. */
public void actionPerformed(ActionEvent e) {
//Update the view of the window based on which button is pressed
protected void updateView( KeyEvent e ) {
//if UP is pressed
if ( e.getKeyCode() == 38 ) {
keyUP = true;
if ( checkCollision( blockPositionX, blockPositionY - 1 ) == false ) {
blockPositionY = blockPositionY - 1;
this.repaint();
moveBlock();
keyUP = false;
//if DOWN is pressed
if ( e.getKeyCode() == 40 ) {
keyDOWN = true;
if ( checkCollision( blockPositionX, blockPositionY + 1 ) == false ) {
blockPositionY = blockPositionY + 1;
this.repaint();
moveBlock();
keyDOWN = false;
//if LEFT is pressed
if ( e.getKeyCode() == 37 ) {
keyLEFT = true;
if ( checkCollision( blockPositionX - 1, blockPositionY ) == false ) {
blockPositionX = blockPositionX - 1;
this.repaint();
moveBlock();
keyLEFT = false;
//if RIGHT is pressed
if ( e.getKeyCode() == 39 ) {
keyRIGHT = true;
if ( checkCollision( blockPositionX + 1, blockPositionY ) == false ) {
blockPositionX = blockPositionX + 1;
this.repaint();
moveBlock();
keyRIGHT = false;
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("SmallWorld");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new SmallWorld();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setSize(500,520);
frame.setVisible(true);
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
The world DAT file:
111111111111111111111111111111
100010001010001000101000100011
100010001010001000101000100011
100011101010000000001000000001
100010000010000000001000000001
100110000010000000001000000001
100000000010000000001000000001
111100011110000000001000000001
100000000110001110111000111011
100000000000001110111000111011
100000000000000000001000000001
100010001110000000000000000001
100010001110001110111000111011
100011101100000000000000000011
100010000110001110111000111011
100110000100000000000000000011
100000000110000000001000000001
111100011100000000000000000011
100000000100000000000000000011
100000000010000000000000000001
100000000010000000000000000001
100010000000000000000000000001
100010000000001110111000111011
100011101110000000011000000001
100010000110000000011000000001
100110000110000000001000000001
100000000110001110111000111011
111100011110000000011000000001
100000000110000000011000000001
100000000011111111111111111111I know this is an old posting, but I just saw another question similiar to this and I still have my old code lying around that incorporates most of the suggestions made in this posting. So I thought I'd post my code here in case anybody wants to copy/paste the code. You will still need to use the DAT file provide above as well as provide icons to represent the floor and wall.
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class SmallWorld extends JPanel implements KeyListener, ActionListener
//WORLD
String[][] worldArray = new String[30][30];
//Block colors
private static Color redBlock = new Color(255,0,0,255);
private static Color whiteBlock = new Color(255,255,255,255);
private static Color blackBlock = new Color(0,0,0,150);
//World images
// JLabel wall = new JLabel( new ImageIcon("wall.gif") );
// JLabel floor = new JLabel( new ImageIcon("floor.gif") );
ImageIcon wallIcon = new ImageIcon("dukewavered.gif");
ImageIcon floorIcon = new ImageIcon("copy16.gif");
//Starting coordinates
int blockPositionX = 1;
int blockPositionY = 1;
//Typing area to capture keyEvent
JTextField typingArea;
//Viewable area
JViewport viewable;
String type = "";
JLayeredPane layeredPane;
JPanel worldBack;
JPanel panel;
JPanel player;
Dimension worldSize = new Dimension(1500, 1500);
public SmallWorld() {
super( );
createWorld();
layeredPane = new JLayeredPane();
add(layeredPane);
layeredPane.setPreferredSize( worldSize );
worldBack = new JPanel();
layeredPane.add(worldBack, JLayeredPane.DEFAULT_LAYER);
worldBack.setLayout( new GridLayout(30, 30) );
worldBack.setPreferredSize( worldSize );
worldBack.setBounds(0, 0, worldSize.width, worldSize.height);
worldBack.setBackground( whiteBlock );
for (int i = 0; i < 30; i++) {
for (int j = 0; j < 30; j++) {
JPanel square = new JPanel( new BorderLayout() );
worldBack.add( square );
type = worldArray[i][j];
if ( type.equals("1") )
square.add( new JLabel(wallIcon) );
else
square.add( new JLabel(floorIcon) );
//Draw the player
player = new JPanel();
player.setBounds(50, 50, 50, 50);
player.setBackground( Color.black );
player.setLocation(50, 50);
layeredPane.add(player, JLayeredPane.DRAG_LAYER);
//set where the player starts
// panel = (JPanel)worldBack.getComponent( 31 );
// panel.add( player );
//Create the typing area with keyListener, add to window
typingArea = new JTextField(20);
typingArea.addKeyListener(this);
typingArea.setEditable( false );
add(typingArea);
//Get the world from the DAT file and translate it into
//a 2d array to be used by paintComponent
public void createWorld() {
String getData = null;
int countRow = 0;
try {
//Get file
FileReader fr = new FileReader("world.dat");
BufferedReader br = new BufferedReader(fr);
getData = new String();
//read each line from file, store to 2d array
while ((getData = br.readLine()) != null) {
if(countRow < 30) {
for (int i = 0; i < 30; i++) {
String temp = "" + getData.charAt(i);
worldArray[countRow] = temp;
countRow++;
} catch (IOException e) {
System.out.println("Uh oh, got an IOException error!");
e.printStackTrace();
//Move Block around the world
public void moveBlock() {
Point pt = new Point();
pt.x = blockPositionX * 50;
pt.y = blockPositionY * 50;
int x = Math.max(0, pt.x - 250);
int y = Math.max(0, pt.y - 250);
Rectangle r = new Rectangle(x, y, 550, 550);
scrollRectToVisible( r );
//check for collisions with blocks
public boolean checkCollision(int row, int col) {
if ( worldArray[col][row].equals("1") ) {
return true;
else {
return false;
public void keyTyped(KeyEvent e) {
public void keyPressed(KeyEvent e) {
updateView( e );
e.consume();
public void keyReleased(KeyEvent e) {
public void actionPerformed(ActionEvent e) {
//Update the view of the window based on which button is pressed
protected void updateView( KeyEvent e ) {
//if UP
if ( e.getKeyCode() == 38 ) {
if ( checkCollision( blockPositionX, blockPositionY - 1 ) == false ) {
blockPositionY = blockPositionY - 1;
moveBlock();
player.setLocation(blockPositionX *50, blockPositionY*50);
//if DOWN
if ( e.getKeyCode() == 40 ) {
if ( checkCollision( blockPositionX, blockPositionY + 1 ) == false ) {
blockPositionY = blockPositionY + 1;
moveBlock();
player.setLocation(blockPositionX *50, blockPositionY*50);
//if LEFT
if ( e.getKeyCode() == 37 ) {
if ( checkCollision( blockPositionX - 1, blockPositionY ) == false ) {
blockPositionX = blockPositionX - 1;
moveBlock();
player.setLocation(blockPositionX *50, blockPositionY*50);
//if RIGHT
if ( e.getKeyCode() == 39 ) {
if ( checkCollision( blockPositionX + 1, blockPositionY ) == false ) {
blockPositionX = blockPositionX + 1;
moveBlock();
player.setLocation(blockPositionX *50, blockPositionY*50);
private static void createAndShowGUI() {
JFrame frame = new JFrame("SmallWorld");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new SmallWorld();
newContentPane.setPreferredSize( new Dimension(1500, 1500) );
JScrollPane scrollPane = new JScrollPane( newContentPane );
scrollPane.setPreferredSize( new Dimension(568, 568) );
frame.getContentPane().add( scrollPane );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setResizable( false );
//frame.setSize(500,520);
frame.setVisible( true );
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater( new Runnable() {
public void run() {
createAndShowGUI(); -
How to find a String in a Vector???
Hi!!
Thanks in advance for read this post. I have a little problem... please help me.
I need to find if a String exists or not in a Vector. The vector is a list of results from a database. Here goes my code:
<html>
... html code ...
<%
int IdClass = Integer.parseInt(request.getParameter("IdClass"));
int module = Integer.parseInt(request.getParameter("module");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
int oError = -1;
String oMessage = null;
List Functions = new Vector();
CallableStatement cs = null;
try{
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DBConnection.GetConnection(DBConnection.DSN);
if (conn != null) {
cs = conn.prepareCall ("begin procedure(?,?,?,?); end;");
cs.setInt(1,IdClass);
cs.registerOutParameter(2,Types.INTEGER);
cs.registerOutParameter(3,Types.VARCHAR);
cs.registerOutParameter(4,OracleTypes.CURSOR);
cs.execute();
rs = (ResultSet)cs.getObject(4);
oError = cs.getInt(2);
oMessage = cs.getString(3);
if (oError == 0) {
while (rs.next()) {
Functions.add(rs.getString(1));
session.setAttribute("sessionFunctions", Functions);
out.println("<script>document.location.href=\"Ok.jsp\";</script>");
else {
String message = null;
message = "Error "+oError+": "+oMessage;
out.println("<script>document.location.href=\"NO.jsp\";</script>");
cs.close();
if (conn != null) {
conn.close();
%>
... html code...
</html>
That code generates a Vector that contains this:
[1, 2, 3, 6, 7, 8, 15, 28, 35, 41, 58, 65, 66, 68, 71, 74]
In the Ok.jsp page, i have a String like this:
String access = "2,7,14,15,28";
First, i need to get the values of the sessionFunctions.
String X = (String)session.getAttribute("sessionFunctions");
I need to know if each number (2,7,14...) exists in the vector. For example, in this case, the follow numbers exists: 2, 7, 15, 28.
So, if the number exists in the Vector, i will generate some HTML code. If not, i will generate a different HTML Code.
if (String exists in Vector = 1) {
out.println("Yes!!!");
else {
out.println("No...");
Can somebody help me? I`ve read a lot of examples, a lot of posts in this forum, i`ve look a lot of files of another project in my company, but i can�t find how to do this...
Thanks in advance.
Rapeteiro.If you are putting a Vector in a session, you should be able to get it back as a Vector. Try this:
// retrieve Functions Vector from session
Vector userProfile = (Vector) session.getAttribute("sessionFunctions");
String access = "2,7,14,15,28";
// prepare a Vector from this string
Vector accessVector = new Vector();
StringTokenizer acsTokenizer = new StringTokenizer(access, ",");
while(acsTokenizer.hasMoreTokens ())
accessVector.addElement (acsTokenizer.nextElement ());
// check for each function in string against userProfile Vector
for(int f=0;f<accessVector.size ();f++)
String function = (String)accessVector.elementAt (f);
if(userProfile.contains (function)
%>User has access to this function<%
else
%>User does not have access to this function<%
Hope this helps!
-Mak -
How to put data into a RFC import parameter structure from portal
Hi, All,
I have a RFC in which an import parameter is a structure (not a table). I want to put data into that structure. I know how to put data into a table or a string. I tried to use
IRecordSet MyTABStr = (IRecordSet)structureFactory.getStructure(function.getParameter("MYTABSTR").getStructure());
MyTABStr.setString("FIELD1", value1);
MyTABStr.setString("FIELD2", value2);
importParams.put("MYTABSTR",MyTABStr);
But it works for table not structure. Is there anybody know how to do that?
Thanks in advance!
MeiyingHi,
You can try the following code -
IRecord structure = (IRecord)structureFactory.getStructure(function.getParameter("MYTABSTR").getStructure());
structure.setString("FIELD1", value1);
structure.setString("FIELD2", value2);
importParams.put("MYTABSTR",structure);
Regards,
Sudip
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