Re: Creating an object of a superclass - Java Discussion Boards

Re: how to read exact content of word in java

JP_Rocks29-May-11 22:34

JP_Rocks

29-May-11 22:34

Duplicate + No Code format (Pre Tags)

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how to read exact content of word in java

priya218411-May-11 0:02

priya2184

11-May-11 0:02

Sir ,
Can any one help me in reading the exact word content.
I have the following code with me:

_____***********Code start here*********----------------

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;

public class DocRead1 {

public void readDocFile() {
File docFile = null;
WordExtractor docExtractor = null ;
WordExtractor exprExtractor = null ;
try {
docFile = new File("/Users/priyaranjan/Desktop/Hello.doc");
//A FileInputStream obtains input bytes from a file.
FileInputStream fis=new FileInputStream(docFile.getAbsolutePath());

//A HWPFDocument used to read document file from FileInputStream
HWPFDocument doc=new HWPFDocument(fis);

docExtractor = new WordExtractor(doc);
}
catch(Exception exep)
{
System.out.println(exep.getMessage());
}

//This Array stores each line from the document file.
String [] docArray = docExtractor.getParagraphText();

for(int i=0;i<docArray.length;i++)
{
if(docArray[i] != null)
System.out.println("Line "+ i +" : " + docArray[i]);
}
}

public static void main(String[] args) {
DocRead1 reader = new DocRead1();
reader.readDocFile();
}
}

------------*****************________________________

But i am getting the same out put whenever i made a change in font of letters used in word.I mean suppose in first case i have made the letter bold then in the second case i have made the letters italics.
But the above program is giving me the same output in both the case.I want to read the exact content of word document.

Can any one help me in this case...

Regards,
Priya

Re: how to read exact content of word in java

Nagy Vilmos11-May-11 0:17

Nagy Vilmos

11-May-11 0:17

You are reading out the text from the document and ignoring the markup.
Check the API to see if you can maybe read it as RTF or with some other markup so you can see the changes.

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Creating an object of a superclass

kurt110-May-11 9:20

kurt1

10-May-11 9:20

Hi All,
I think the answer to this is easy but its been causing me all kinds of problems. If i want to create an object of a super class in a subclass, how do i go about it if the superclass has arguments? Eg

Superclass Player - has the constructor:
public Player (Animation left, Animation right){
super(left, right)
this.left = left;
this.right = right;}

To make things more complecated the Player class extends another class with the following arguments:
public Monster (Animation left, Animation right){
super(right);
this.left = left;
this.right = right;}

Finally Monster extends Sprite
public Sprite(Animation a){
this.a = a;}

I want to create an object (instance) of Player in a new class called InventoryItems so it gives me access to all of the methods of the Player class (cant extend the class Player as im already extending another class), can anyone help?

Thank you.

Re: Creating an object of a superclass [modified]

Luc Pattyn10-May-11 12:43

Luc Pattyn

10-May-11 12:43

When you have an inheritance chain child -> father -> grandfather, then each class constructor can access its father's constructor, and each class method can call it's fathers methods using the super keyword as documented here[^], however the child cannot access constructors nor methods of his grandfather.

This is inherent on how object-orientation works, it is the same in C# (where super is called base); if you feel a need to do that, your design is probably flawed.

Have you considered using interfaces instead of, or on top of, inheritance?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

modified on Tuesday, May 10, 2011 6:59 PM

Re: Creating an object of a superclass

Nagy Vilmos10-May-11 23:11

Nagy Vilmos

10-May-11 23:11

Further to Luc's excellent answer your classes are:

class Sprite {
   ...
}

class Monster
      extends Sprite {
   ...
}

class Player
      extends Monster {
   ...
}

You need to have an interface for InventoryItems that defines all the methods required and then impliement it in Player:

class Player
      extends Monster
      impliments InventoryInterface {
   ...
}

Re: Creating an object of a superclass

Luc Pattyn11-May-11 0:54

Luc Pattyn

11-May-11 0:54

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Creating an object of a superclass

jschell11-May-11 8:49

jschell

11-May-11 8:49

My guess is that you want to create an instance of Player but you don't have 'left' and 'right'.

If so I suspect your design is flawed.

It isn't clear what 'Animation' is but if is some type of avatar display then it should be optional. If it is an attempt to actually display the player then that logic shouldn't be in player at all.

And Monster shouldn't exist. You can add an attribute to Player which designates the difference between the two unless they are in fact different and in that case they should have an inheritence relationship (a different parent or even composition would be better.)

How to get only modified files from vss using ant scripts [modified]

Payam Rastogi9-May-11 19:27

Payam Rastogi

9-May-11 19:27

I want to get only the modified files from vss using ant scripting. so far I was able to get all the files from the vss from a particular folder but I want only the latest modified files or the files by date-time

here goes the code:

<code>
<?xml version="1.0"?>
<project name="PDN Processing" default="" basedir=".">
<property file="${basedir}/process.properties"/>

<mkdir dir="${basedir}/Workspace/Library"/>

<echo message="${pathvss}" />

<vssget localpath=".\Workspace\Library"
recursive="true"
login="${login},${password}"
ssdir="${pathvss}"
serverPath="${serverPath}"
vsspath="${basefolder}/Library"
writable="true"
date = "4/18/11"
filetimestamp="modified"/>
</project>
</code>

Thanks

-- Modified Tuesday, May 10, 2011 2:41 AM

Re: How to get only modified files from vss using ant scripts

Richard MacCutchan9-May-11 22:06

Richard MacCutchan

9-May-11 22:06

What is this to do with Java?

The best things in life are not things.

Re: How to get only modified files from vss using ant scripts

David Skelly9-May-11 22:35

David Skelly

9-May-11 22:35

Ant is written in Java and 99% of the people who use it are using it for building Java applications. There isn't a dedicated Ant forum, so this seems as good a place to ask the question as any.

Re: How to get only modified files from vss using ant scripts

Richard MacCutchan10-May-11 12:07

Richard MacCutchan

10-May-11 12:07

A number of people seem not to like this answer for some reason. Personally, I thought it perfectly reasonable (although I don't necessarily agree with you) so I have bunged in a 5 as compensation.

The best things in life are not things.

Re: How to get only modified files from vss using ant scripts

TorstenH.10-May-11 4:10

TorstenH.

10-May-11 4:10

check this:
Selectors on Apache Ant[^]

regards
Torsten

I never finish anyth...

Re: How to get only modified files from vss using ant scripts

jschell10-May-11 11:56

jschell

10-May-11 11:56

Payam Rastogi wrote:
I want to get only the modified files from vss using ant scripting.

Why?

Just to eliminate one situation...

You are running a 'build' which is generally intended for a production delivery.
Then the ONLY way you should be doing this is.
1. Clear the ENTIRE directory tree.
2. Extract EVERYTHING.
3. Build.

In the above scenario there is no need to extract a subset of files.

Re: How to get only modified files from vss using ant scripts

David Skelly10-May-11 22:19

David Skelly

10-May-11 22:19

For a full production build, yes, you would want to rebuild everything from the ground up. But a continuous integration build doesn't need to do this, it only needs to do an incremental build of the things that have changed since the last time it ran.

All the main continuous integration tools allow you to do this as far as I am aware.

random runtime crash

kartikdasani9-May-11 3:12

kartikdasani

9-May-11 3:12

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (0xe06d7363), pid=3292, tid=820
#
# JRE version: 6.0_17-b04
# Java VM: Java HotSpot(TM) Client VM (14.3-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [kernel32.dll+0x12aeb]
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

I receive the following error intermittently while running a batch of scripts.
The problem is that it only happens some times and randomly. Any suggestions to stop this from happening are welcome.

Re: random runtime crash

Nagy Vilmos9-May-11 3:31

Nagy Vilmos

9-May-11 3:31

Check that you're not getting yourself into an infinite loop as this has been observered to cause this problem.

Re: random runtime crash

jschell9-May-11 9:34

jschell

9-May-11 9:34

The vast majority of infinite loops will not cause that.

Re: random runtime crash

jschell9-May-11 9:37

jschell

9-May-11 9:37

If and ONLY if you are not using JNI or a 3rd party library that uses JNI then you have a VM bug.

It is remotely possible that this might be caused by your environment. But even so there isn't much you can do about it in terms of fixing it.

You would need to localize the code that caused it and then you must find another way to write the code. If you can localize it to something fairly small then you should report it as a bug to Oracle via the java bug list.

Re: random runtime crash

TorstenH.10-May-11 4:14

TorstenH.

10-May-11 4:14

I second that - try every script by it's own and find the one that crashes the Java Hot Spot VM[^]

regards
Torsten

I never finish anyth...

Re: random runtime crash

David Skelly10-May-11 6:14

David Skelly

10-May-11 6:14

You could try updating to a more recent build of Java. Update 17 is quite old now and it is possible that there may have been some fixes to more recent releases. I know that these things aren't always that easy, particularly if this involves upgrading a live production system, but if you can upgrade then it might be worth a try.

[Help]How to use throw and throws?

tuanvu_n6-May-11 2:15

tuanvu_n

6-May-11 2:15

Who can give me an example ? Please Wink | ;)

Re: [Help]How to use throw and throws?

TorstenH.6-May-11 2:19

TorstenH.

6-May-11 2:19

Exceptions @ oracle.com[^]

direct link to throws declaration[^]

direct link to throw command[^]

can't explain it any better.

regards
Torsten

I never finish anyth...

Re: [Help]How to use throw and throws?

tuanvu_n6-May-11 2:32

tuanvu_n

6-May-11 2:32

Oh, Thanks, Have you a good day!

Re: [Help]How to use throw and throws?

Luc Pattyn6-May-11 3:59

Luc Pattyn

6-May-11 3:59

So you're too lazy to look it up? those are language keywords, they get explained in the language reference documentation, as well as in any book on the language. Tsk. Tsk. Unsure | :~

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