How can i rewrite this code
i have tried to rewrite this code but keep getting errors. ive read loads of tutorials on actionperformed and mouseclicked i just need som1 to point me in the right direction
heres the code
public boolean mouseUp(Event e, int x, int y){
if (y == 0)
swit = true;
return true;
//else
if (pics[getMC(x,y)].getID() > rw*col/2){
return true;}
if (0 == track)
card1 = pics[getMC(x,y)];
start = new Date();
etime.start();
track = 2;
stat = "pic again";
repaint();
return true;
if (1 == track){
card1 = pics[getMC(x,y)];
track = 2;
stat = "pick again";
repaint();
return true;
else if (2 == track)
if (card1 == pics[getMC(x,y)]) return true;
card2 = pics[getMC(x,y)];
track = 3;
attempts++;
if (card1.getID() == card2.getID())
stat = "well done";
matched++;
if (rw*col/2 == matched)
stat = "finished";
etime = null;
else
stat = "Try Again";
repaint();
return true;
else
return false;
}
Hi,
Do you want your code to listen to different Mouse events? and what other events?
ex:
copy the content of the below link and run the application
http://java.sun.com/docs/books/tutorial/uiswing/examples/events/MouseEventDemoProject/src/events/MouseEventDemo.java
http://java.sun.com/docs/books/tutorial/uiswing/examples/events/MouseEventDemoProject/src/events/BlankArea.java
If you have any problem with the code; please let us know
Regards,
Alan Mehio
London,UK
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How can i rewrite this code into a java that has a return value?
this code is written in vb6
Private Function IsOdd(pintNumberIn) As Boolean
If (pintNumberIn Mod 2) = 0 Then
IsOdd = False
Else
IsOdd = True
End If
End Function
Private Sub cmdTryIt_Click()
Dim intNumIn As Integer
Dim blnNumIsOdd As Boolean
intNumIn = Val(InputBox("Enter a number:", "IsOdd Test"))
blnNumIsOdd = IsOdd(intNumIn)
If blnNumIsOdd Then
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End If
End Sub873221 wrote:
I'm sorry I'am New to Java.Are you new to communication? You don't have to know anything at all about Java to know that "I have an error," doesn't say anything useful.
I'm just trying to get you to think about what your post actually says, and what others will take from it.
what does this error mean? what code should i replace and add? thanks for all response
C:\EvenOdd.java:31: isOdd(int) in EvenOdd cannot be applied to ()
isOdd()=true;
^
C:\EvenOdd.java:35: isOdd(int) in EvenOdd cannot be applied to ()
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^
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Telling you "what code to change it to" will not help you at all. You need to learn Java, read the error message, and think about what it says.
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Hi,
I have the following update stmt that runs for over 6 hours. Here is the SQL and its plan:
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Edited by: user6053424 on Jul 21, 2010 6:59 AMHi,
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create global temporary table table1_tmp
on commit preserve rows
as SELECT comp#,polnum,a8dtef,a8deef,a8dtac,
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UPDATE TABLE1
SET mainveh = 'Y'
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hello, everybody:
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thanks every body's help!ok, thanks for your reply ! I run this code in the Flex builder 3!and the Ball class and the Chain class are all in the same AS project!
and i changed the ball.pv property as public in the Ball class, and the Chain class has no wrong syntactic analysis,but the AS code don't run.so this is the problem.
2010-04-21
Fang
发件人: Ned Murphy <[email protected]>
发送时间: 2010-04-20 23:01
主 题: how can i run this code correctly?
收件人: fang alvin <[email protected]>
I don't see that the Ball class has a pv property, or that you even try to access a pv property in the Chain class. All of the properties in your Ball class are declared as private, so you probably cannot access them directly. They would need to be public. Also, I still don't see where you import Ball in the chain class such that it can use it. -
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DATA: t_bkpf TYPE bkpf.
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you are able to display only 20 lines at a time, you just need the additional code for reading System.in
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System.out.print(s + " ");
System.out.flush();
public static String readData ( BufferedReader in) {
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hello,
I have a small problem with this code:
#include <fstream>
#include <iostream>
#include <algorithm>
#include <iterator>
#include <string>
#include <vector>
using namespace std;
int main()
string from, to;
cin >> from >> to;
ifstream is(from.c_str());
istream_iterator<string> ii(is);
istream_iterator<string> eos;
// line 24: Error:
vector<string> b(ii, eos); // line 24: Error:
sort(b.begin(), b.end());
ofstream os(to.c_str());
ostream_iterator<string> oo(os, "\n");
unique_copy(b.begin(), b.end(), oo);
return !is.eof() && !os;
return 0;
}When I compile this happens
bash-2.05$ CC -V
CC: Sun C++ 5.6 2004/06/02
bash-2.05$ CC -o std_vector.out std_vector.cpp
"std_vector.cpp", line 24: Error:
Could not find a match for
std::vector<std::string>::vector(std::istream_iterator<std::string, char, std::char_traits<char>, int>, std::istream_iterator<std::string, char, std::char_traits<char>, int>)needed in main().
1 Error(s) detected.
What can I do ?
best regards
Morten GulbrandsenYou have run into a documented limitation of the default libCstd implementation of the C++ standard library. The default library is not a complete implementation, and in particular lacks required template member functions that allow implicit type conversions. We still use this library for binary compatibility with earlier releases.
The optional STLport version of the library is a full implementation of hte C++ Standard Library. If you don't need binary compatibility, meaning you don't need to link to code that uses libCstd, you can add the option -library=stlport4 to every CC command line, compiling and linking. Your sample code compiles with STLport.
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import javax.swing.JOptionPane;
public class lab09b
public static void main (String args[])
String str;
int num = 1, den = 1; //Initializes variables for use.
Rational2 r3 = new Rational2 (num,den); //Creates new Rational2 object to be used for math operations.
str = JOptionPane.showInputDialog("Enter Numerator 1:");
num = Integer.parseInt(str);
str = JOptionPane.showInputDialog("Enter Denominator 1:");
den = Integer.parseInt(str);
Rational1 rA = new Rational1 (num,den); //Creates object to store original input of fraction 1.
Rational2 r1 = new Rational2 (num,den); //Creates object to store reduced input of fraction 1.
str = JOptionPane.showInputDialog("Enter Numerator 2:");
num = Integer.parseInt(str);
str = JOptionPane.showInputDialog("Enter Denominator 2:");
den = Integer.parseInt(str);
Rational1 rB = new Rational1 (num,den); //Creates object to store original input of fraction 2.
Rational2 r2 = new Rational2 (num,den); //Creates object to store reduced input of fraction 1.
r3.add(r1,r2);
JOptionPane.showMessageDialog(null,rA.getOriginal()+"+"+rB.getOriginal()+"="+r3.getRational()); //Outputs results of addition
r3.multiply(r1,r2);
JOptionPane.showMessageDialog(null,rA.getOriginal()+"*"+rB.getOriginal()+"="+r3.getRational()); //Outputs results of multiplication.
System.exit(0);
class Rational1
protected int num; // Entered numerator.
protected int den; // Entered denominator.
private int getGCF(int n1,int n2) //Method for reduction.
int rem = 0;
int gcf = 0;
do
rem = n1 % n2;
if (rem == 0)
gcf = n2;
else
n1 = n2;
n2 = rem;
while (rem != 0);
return gcf;
public void reduce() //Modifies fraction to a equivalent simplified rational.
int gcf = getGCF(num,den);
num = num / gcf;
den = den / gcf;
public Rational1(int n, int d) //Constructs Rational1 without reducing it.
num = n;
if (d == 0)
System.out.println("Illegal denominator; altered to 1");
den = 1;
else
den = d;
public int getNum() //Returns Numerator.
return num;
public int getDen() //Returns Denominator.
return den;
public String getOriginal() //Returns Original Fraction.
return ""+num+"/"+den;
class Rational2 extends Rational1 //Class used to modify fractions.
public Rational2(int n, int d) //Constructs Rational2 using superclass constructor.
super(n,d);
public String getRational() //Returns the reduced fraction version.
super.reduce();
return ""+num+"/"+den;
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den = r1.getDen() * r2.getDen();
num = r1.getNum() * r2.getDen() + r2.getNum() * r1.getDen();
public void multiply(Rational2 r1, Rational2 r2) //Multiplies two rationals.
den = r1.getDen() * r2.getDen();
num = r1.getNum() * r2.getNum();
}seems simple enough to me.... you want complicated code... I could find you some good complicated code, and you'll look at yours and say, wow, this is pretty simple.
What part are you expecting to simplify?
Does it compile? Does it run? Does it do what you expect it to do? -
How can I make this code faster? optimized.
Its part of two jsp pages that go back and forth. I feel I am creating new strings all of the time. I have 3 graphic representations of a radion button and a check box. its for a quiz program.
if the button is not checked, it uses rd0.gif.
if the button is checked, then its assigned rd1.gif.
However, if the button is the wrong answer, then its assigned rd2.gif.
the use of char arrays is neccasary, but not vital, I guess I could use indexof in the string. But I Dont know if its faster. I want to optimize the code, so it uses less resources.
heres the code
TrueFalse=entry[11].indexOf("TRUE");
myButton = Integer.parseInt((String)session.getAttribute("BUTTONNO"));
GivenAnswer =(String)session.getAttribute("GIVEN");
if(TrueFalse==-1) {
char[] questions = GivenAnswer.toCharArray();
for(x=1;x<5;x++) {
if(questions[x]=='1') { bp[x]="images/ck1.gif"; }else{ bp[x]="images/ck0.gif";}
}else{
if(myButton==1) {bp[1] = "images/rd1.gif";} else {bp[1] = "images/rd0.gif";}
if(myButton==2) {bp[2] = "images/rd1.gif";} else {bp[2] = "images/rd0.gif";}
questions is discarded.
the quiz is fast at the begining, but once you go deeper and deeper it slows down. This is the second page:
<%@ include file ="include4.jsp" %>
<%
session.setAttribute("BUTTONNO", "1");
GivenAnswer =(String)session.getAttribute("GIVEN");
char[] questions = GivenAnswer.toCharArray();
questions[1]='1';
tempString = new String (questions);
GivenAnswer = tempString;
session.setAttribute("GIVEN", GivenAnswer);
%>
<jsp:forward page="train2.jsp">
</jsp:forward>
I tried to keep all of the code on one page, but I am using images instead of real radio buttons, for several reasons. JSP doesnt seem to return a value for check/radio buttons in JSP, so clicking on an anchored image and going to a second JSP PAge seemed reasonable. I dont know how to force garbage collection. But the speed in which the pages and images appear, get slower and slower. so I Think im using up memory (Stings) at a greater rate than I should.
thanks
MIKe NIEMI
[email protected]I'm not sure that an "optimisation" is necessarily what you're after. I doubt it's the creation of Strings that's causing any performance issue - even if it is then it's probably the result of something more sinister.
Don't assume that your code is using a lot of resources.
For example it's tempting to change it to this:
if(myButton==1) {bp[1] = "images/rd1.gif";} else {bp[1] = "images/rd0.gif";}
if(myButton==2) {bp[2] = "images/rd1.gif";} else {bp[2] = "images/rd0.gif";}
// change to this?
bp[myButton] = "images/rd1.gif";
bp[3 - myButton] = "images/rd0.gif";I'd say that the original code was clearer and used just as many resources (once the Strings are interned).
The same goes for this:
if(questions[x]=='1') { bp[x]="images/ck1.gif"; }else{ bp[x]="images/ck0.gif";}
// change to this?
bp[x] = "images/ck" + questions[x] + ".gif";Again, the former is possibly clearer as it indicates that questions is really a boolean flag - it should also be easily optimised by the compiler.
You're right that you could replace "questions" by simply using GivenAnswer.charAt(x).
Enterprise Java applications can generate hundreds of thousands of Strings during their execution - your Servlet is unlikely to have a serious impact on that unless you've got an enormous loop in there or a very large user base.
A golden rule of optimisation is not to assume that you know where the performance/resource bottlenecks are. Measure the improvement you get from a change - does it warrant the resultant increase in the complexity of the code?
Put some profiling in your code - how long is it taking to run your Servlet? How many times is it being invoked? I can't imagine that the code you've provided will take more than a few milliseconds to run.
Also, you can't force garbage collection. You can suggest it to the Java runtime (it might not even have a garbage collector!). However, this generally indicates a flaw in the application and should be avoided unless absolutely necessary (and it's not in this case!).
If you really want to optimise then get hold of something like OptimizeIt - it will provide a great deal of information about what's being created and where.
Hope this helps. -
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insert newCategoryItem into Main.categoryItems;
{code}
I use the above code to get a PHP file to return all the recipe categories in a database table. The insert -> creates a dynamic menu. the println has confirmed that each menu item is assigned the correct text and recipe ID.
I can click any one of the 19 "category" menu items generated and the "OnMouseClicked:" will call and start getRecipes.
The code for getRecipes is identical to the code shown except that the returned recipes are inserted into the "recipe" menu instead of the "category" menu.
Now it doesn't matter if I click an item in the "Recipe" or "Category" menu ......... any attempt to reuse the HTTPRequest functions will return:
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: request reuse not permitted
at javafx.io.http.HttpRequest.start(HttpRequest.fx:1316)
at jim2.categories$categories$Script$1Local$5$1ForPart$3.invoke$(categories.fx:59)
at com.sun.javafx.functions.Function1.invoke(Function1.java:44)
at com.sun.javafx.functions.Function1.invoke$(Function1.java:38)
at javafx.scene.Node.impl_processMouseEvent(Node.fx:2938)
at javafx.scene.Node.preprocessMouseEvent(Node.fx:2967)
at javafx.scene.Scene$MouseHandler.process(Scene.fx:1559)
at javafx.scene.Scene$MouseHandler.process(Scene.fx:1421)
at javafx.scene.Scene.impl_processMouseEvent(Scene.fx:686)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.fx:1016)
at com.sun.javafx.tk.swing.SwingScene$SwingScenePanel.doMouseEvent(SwingScene.java:446)
at com.sun.javafx.tk.swing.SwingScene$SwingScenePanel.mouseClicked(SwingScene.java:454)
at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Since this is a recipe program you can see that I'm going to have to call the database for data each time a different category or recipe is called.
*QUESTION: What do I have to do to get the HTTPRequest to work repeatly*
Edited by: JWK on Feb 28, 2011 11:54 AMExactly what it says; Create a new http request every single time you want to retrieve the data:
//Records data retrieved from the request.
var data : String;
function makeRequest() : Void {
//Create a new request object every time this function is called.
var request : HttpRequest = HttpRequest {
location: "http://en.wikipedia.org/"
onInput: function(io : InputStream) {
//Read input to data string and close input stream
//Make the request connect.
request.start();
//Get the data
makeRequest();
//Get the data again.
makeRequest();Each individual HttpRequest object is meant to be used once and only once so you need to create a new one each time. -
How can we rewrite this query for better performance
Hi All,
The below query is taking more time to run. Any ideas how to improve the performance by rewriting the query using NOT EXITS or any other way...
Help Appreciated.
/* Formatted on 2012/04/25 18:00 (Formatter Plus v4.8.8) */
SELECT vendor_id
FROM po_vendors
WHERE end_date_active IS NULL
AND enabled_flag = 'Y'
and vendor_id NOT IN ( /* Formatted on 2012/04/25 18:25 (Formatter Plus v4.8.8) */
SELECT vendor_id
FROM po_headers_all
WHERE TO_DATE (creation_date) BETWEEN TO_DATE (SYSDATE - 365)
AND TO_DATE (SYSDATE))
ThanksTry this one :
This will help you for partial fetching of data
SELECT /*+ first_rows(50) no_cpu_costing */
vendor_id
FROM po_vendors
WHERE end_date_active IS NULL
AND enabled_flag = 'Y'
AND vendor_id NOT IN (
SELECT vendor_id
FROM po_headers_all
WHERE TO_DATE (creation_date) BETWEEN TO_DATE (SYSDATE - 365)
AND TO_DATE (SYSDATE))
overall your query is also fine, because, the in this query the subquery always contain less data compare to main query.
Maybe you are looking for
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