Java Discussion Boards

Re: I have designed two html pages how to connect them in Java ?

Michaelabner9-Jan-17 1:15

9-Jan-17 1:15

First create the servlet and then through the "doget" method

ad = request.getParameter("ad");//html input name

After insert database.. good luck

Java Developer

CLARIFY

Sruthi Priya 20-Dec-16 23:47

Sruthi Priya

20-Dec-16 23:47

HOW ARE PACKAGES USED IN JAVA?

Re: CLARIFY

Peter Leow20-Dec-16 23:53

Peter Leow

20-Dec-16 23:53

HOW ARE PACKAGES USED IN JAVA - Google Search[^]

Peter Leow
http://www.peterleowblog.com/
https://www.amazon.com/author/peterleow

Cannot Add CheckBox to Frame in AWT

Dev Gupta from Mumbai,India20-Dec-16 20:19

Dev Gupta from Mumbai,India

20-Dec-16 20:19

I am Newbie to Java programming. I have written the following code to add checkbox to a frame, but it doesn't appear on frame. There's no error when compiling..so can anyone please check and let me know how to add checkbox in frame?

import java.awt.*;
import java.awt.event.*;

public class CheckBoxTest {

	private Frame f;
	private Checkbox chk;
	private CheckboxGroup cg;
	CheckBoxTest()
	{
		f=new Frame();
		cg=new CheckboxGroup();
		chk=new Checkbox("Hello",cg, true);
				
		f.addWindowListener(new WindowAdapter()
				{
					public void windowClosing(WindowEvent we)
					{
						f.dispose();
					}
				});
		
		f.add(chk);
		
		f.setSize(300, 300);
		f.setLayout(null);
		f.setVisible(true);
		
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new CheckBoxTest();
	}

}

Re: Cannot Add CheckBox to Frame in AWT

Richard MacCutchan21-Dec-16 0:32

Richard MacCutchan

21-Dec-16 0:32

See AWT CheckBox Control[^].

JAVA

Member 1291150018-Dec-16 22:00

Member 12911500

18-Dec-16 22:00

I want to prepare hotel reservation programme.

Re: JAVA

Richard Deeming19-Dec-16 2:24

Richard Deeming

19-Dec-16 2:24

Well, go ahead - you have our permission.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: JAVA

Mycroft Holmes19-Dec-16 12:01

Mycroft Holmes

19-Dec-16 12:01

Idjit vote reversed

Never underestimate the power of human stupidity
RAH

How do I create sections in my file and get the section's value?

NickTheDev3-Dec-16 17:16

NickTheDev

3-Dec-16 17:16

So, I'm trying to make a "save.dat" so that I can store my player's information in the game into that file, and then read it if they choose to continue. Right now, the file will create, and I can write to it easily, but I want to know how to get rid of "Special Characters" and how to create sections and write to them. I want it to look a little something like this:

PlayerName:
Attack:
Defence:
Speed:
Money:
World:

And allow me to add something like this:

PlayerName: "Nick"
Attack: 6
Defence: 6
Speed: 8
Money 899888
World: "Earth"

Re: How do I create sections in my file and get the section's value?

Richard MacCutchan3-Dec-16 20:59

Richard MacCutchan

3-Dec-16 20:59

You would need to read the file into some list or object which you then update with the relevant details. You then write out the updated records when necessary. You create sections just by writing keywords at particular points in the file. Not sure what you mean by how to get rid of "Special Characters".

You may also like to look into the use of java serialization - Google Search[^].

Re: How do I create sections in my file and get the section's value?

NickTheDev4-Dec-16 6:21

NickTheDev

4-Dec-16 6:21

I get characters in the file such as √∫∆©†¨˚¬ˆ˙¥¥©¥ƒƒ and I'm guessing those are special characters or some sort of encryption.

Could you give me an example? Would this work?

Java

Object playerName = new Object();
//Some sort of writing to the file using object writing.
playerName.set(someVariable);

Re: How do I create sections in my file and get the section's value?

Richard MacCutchan4-Dec-16 6:50

Richard MacCutchan

4-Dec-16 6:50

You have not explained how you are writing the file so it is not possible to tell where those characters are coming from. In terms of serialization the sequence is:
1. Read all current objects from the file.
2. Create any new objects, and update the existing ones, as required by the program.
3. Write all updated objects to the new file.
4. End the program.

Re: How do I create sections in my file and get the section's value?

NickTheDev4-Dec-16 7:22

NickTheDev

4-Dec-16 7:22

Example:

Could you tell me how you would do it? I could then come up with a way that I would do it based on that. An example would help a great deal.

Re: How do I create sections in my file and get the section's value?

Richard MacCutchan4-Dec-16 21:13

Richard MacCutchan

4-Dec-16 21:13

Just like I told you in my previous message, using the links I gave you in my first message.

Regarding this article "XSS vulnarability detection tool for JSP".

Member 121360961-Dec-16 0:57

Member 12136096

1-Dec-16 0:57

Hi Sir,

I have gone through the above mentioned article and it was good. But I'm confused using the tool.I have done the same as what you have said in the article, but when I run the tool it is always showing NullPointerException. Even I have tried with TestPage.jsp from example, but still it is showing the same NullpointException.I have posted the error below.

Thanks in advance,
Nick.

INFO: Validating file /WEB-INF/TestPage.jsp
Exception in thread "main" java.lang.NullPointerException
at org.apache.jasper.compiler.NodeVisitor.visit(NodeVisitor.java:85)
at org.apache.jasper.compiler.Node$ELExpression.accept(Node.java:958)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.JSPValidator.doValidate(JSPValidator.java:325)
at org.apache.jasper.compiler.JSPValidator.validatePages(JSPValidator.java:126)
at org.apache.jasper.compiler.JSPValidator.main(JSPValidator.java:368)

Re: Regarding this article "XSS vulnarability detection tool for JSP".

Richard MacCutchan1-Dec-16 1:04

Richard MacCutchan

1-Dec-16 1:04

Please post your question in the forum at the end of the article so the author gets notified. There are thousands of members online at CodeProject, so you need to direct it to the right person.

How to Call C++ dll in java

shanmugarajaa25-Nov-16 21:16

shanmugarajaa

25-Nov-16 21:16

Dear Friend,
I build the dll(Maths) in visual studio 2013 win32.

Hide Copy Code
#include "stdafx.h"
#include <stdio.h>

extern "C"
{
__declspec(dllexport) int Add(int x, int y)
{
return x+y;
}
}

and tried to call this dll in java using JNA library.

Hide Copy Code
import com.sun.jna.Native;
import libs.IMathFunc;
public class MathFuc {

public static void main(String[] args) {
// TODO Auto-generated method stub

IMathFunc mathfunc = (IMathFunc)Native.loadLibrary("Maths", IMathFunc.class);
int addition = mathfunc.Add(5, 5);
System.out.print(Integer.toString(addition));
}

}

But I dont knwon where I am making mistake

Can anyone refer me an atricle or sample application on this issue.
Please kindly help me on this issue.

Thanks,
S Shanmuga Raja

What I have tried:

I have used JNA library. But it throwing error like:

Hide Copy Code
Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'Maths': JNA native support (win32-amd64/Maths.dll) not found in resource path (E:\Maths\Demo\bin;C:\Program Files\JAVA\jna-3.5.2.jar\jna-3.5.2.jar;E:\MathsDemo\x64\Debug;C:\Program Files\JAVA\jdk1.8.0_71\include\win32)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:220)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:322)
at com.sun.jna.Library$Handler.<init>(Library.java:142)
at com.sun.jna.Native.loadLibrary(Native.java:387)
at com.sun.jna.Native.loadLibrary(Native.java:366)
at MathFuc.main(MathFuc.java:13)

Re: How to Call C++ dll in java

Richard MacCutchan25-Nov-16 21:41

Richard MacCutchan

25-Nov-16 21:41

The message is quite clear, it cannot find the dll file.

Re: How to Call C++ dll in java

shanmugarajaa25-Nov-16 22:57

shanmugarajaa

25-Nov-16 22:57

I have pasted the dll in appropriate location.But still I am facing same error.

Re: How to Call C++ dll in java

Richard MacCutchan25-Nov-16 23:03

Richard MacCutchan

25-Nov-16 23:03

Well it is fairly obvious that the Java runtime cannot find it. Try putting it in the same directory as your Java application, or adding the path to the java.library.path property.

java problem

Member 1283286519-Nov-16 7:26

Member 12832865

19-Nov-16 7:26

please am new in java programming and i have a problem on how to solve the problem below please can any one help me.
how to write a java program to display 3 on labal1 if textbox1 is not empty or display 0 if textbox1 is empty

Re: java problem

Richard MacCutchan19-Nov-16 12:04

Richard MacCutchan

19-Nov-16 12:04

See The Java™ Tutorials[^] .

how to do this string problem?

Jebastin koilraj16-Nov-16 21:32

Jebastin koilraj

16-Nov-16 21:32

if we take input as 'eyes'
then, occurence of e = 2
y = 1
s = 1
then, 2=1+1 ,so the output will be 'YES'
if its not equal ,then output will be 'NO'
that is, check whether the sum of occurences of some character is equal to the sum of occurences of other charcters.

Re: how to do this string problem?

Richard MacCutchan16-Nov-16 22:16

Richard MacCutchan

16-Nov-16 22:16

Very interesting. Now do you have a question?

Re: how to do this string problem?

Jebastin koilraj16-Nov-16 23:44

Jebastin koilraj

16-Nov-16 23:44

yeah, this is my question

if we take input as eyes
then, occurence of e = 2
y = 1
s = 1
then, 2=1+1 ,so the output will be printed like "YES"
if its not equal ,then output will be printed "NO"
that is, check whether the sum of occurences of some character is equal to the sum of occurences of other charcters.

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