Create Jar File

Nov 9, 2014

create a jar file.Currently I have next files in my directory:

Manifest.txt:
-------------
Manifest-Version: 1.0
Created-By: 1.7.0_60-ea (Oracle Corporation)
Main-Class: connectURL

connectURL.class
------------------
it compiled fine, can be executed as:
java connectURL

it does not have 'Package' specified

sqljdbc4.jar
-----------

This is jdbc 4 jar file which is used by connectURL.java to make db. connection.

I am running:
C:j>jar cvfm connectURL.jar Manifest.txt *.class sqljdbc4.jar
added manifest
adding: connectURL.class(in = 2427) (out= 1358)(deflated 44%)
adding: sqljdbc4.jar(in = 584207) (out= 549364)(deflated 5%)

Then trying to execute and get error message

C:j>java -jar connectURL E520 1433
Error: Unable to access jarfile connectURL

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Reading Text File Into Object Array And Create Random Access File

Dec 9, 2014

I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...

The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data. Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;

[Code]...

these continue for about 40-50 entries, they are not seperated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name seperated with spaces, then price after a comma, then quanity after the second comma.....

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package assignment7;
 
import java.io.*;
public class Exercise2
{
public static void main ( String [ ] args ) {
String filePath="newfile.txt";
File newFile = new File ( filePath ) ;

[Code] .....

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1. creates a file.

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3. save the file

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Java Code:

package assignment7;
import java.io.*;
import java.util.*;
public class Exercise2
{
public static void main ( String [ ] args ) throws IOException
{
Scanner scan = new Scanner(System.in);

[code]....

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public void display_by_name()
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[code]....

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Heres is the code:

import java.io.*;
import java.lang.*;
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[Code] ....

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code:

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[Code]....

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^

[Code].....

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text file:

Codebase: myserver.com
Permissions: sandbox
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error message from command line:

C:UsersxxxxDesktopCOMP268applet_ComponentArch_DynamicTreeDemoapplet_Comp
onentArch_DynamicTreeDemouildclasses>jar -cvfm DynamicTreeDemo.jar mymanifest
.txt appletComponentArch
java.io.IOException: invalid header field name: ?≫?Codebase
at java.util.jar.Attributes.read(Attributes.java:433)
at java.util.jar.Manifest.read(Manifest.java:199)
at java.util.jar.Manifest.<init>(Manifest.java:69)
at sun.tools.jar.Main.run(Main.java:172)
at sun.tools.jar.Main.main(Main.java:1177)
[/code]
encoding in UTF-8 and have newline at end

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[CODE]

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[CODE]

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-------
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[Code] ....

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Attached Images

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[Code]...

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[Code] .....

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