Help with manifest.txt for .jar
I have two class files I'm trying to create a .jar file for:
InventoryMain.class (houses my main)
Inventory.class
Both files are in package inventorymain
Here is everything I have tried in my manifest.txt file:
Manifest-Version: 1.0
Main-Class: inventorymain.InventoryMain (1st try)
Main-Class: InventoryMain (2nd try)
Main-Class: inventorymain (third try)
I use the following in command prompt:
jar cvfm Inventory.jar manifest.txt *.class (this runs and says all 3 files are included)
then when I try to run Inventory.jar I get the following error:
A window pops up labeled Java Virtual Machine Launcher with the error of "could not find the main class. Program will exit.
Anyone know what I am doing wrong? I am a student, and this is the first program I have created that uses more than one file. I have been all over the Internet to look for things I can do. I am stumped!! Anyhelp would be appreciated. Here is the beginning of my main program, if it will help someone help me.
package inventorymain;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.BufferedReader;
publicclass InventoryMain
{
// Creates a new instance of InventoryMain
public InventoryMain()
{
}
// main method begins execution of java application
publicstaticvoid main(String[] args)
{
Your 1st attempt was correct. (inventorymain.InventoryMain)
It is likely that your class files are not in the correct directories. The directory structure in the jar files has to match the directory structure that would exist if you were working with loose class files.
You indicate that InventoryMain is in the package inventorymain.
Assuming that your class files are in a directory called "inventorymain",
cd up one directory and recreate the jar file.
jar cvfm Inventory.jar inventorymain/manifest.txt inventorymain/*.class
The class files are in inventorymain aren't they? ... they are supposed to be.
If they are not, and you don't understand why they should be, you should take a look at the info on packages.
http://java.sun.com/docs/books/tutorial/java/package/index.html
found a url for some package info
Message was edited by:
johndjr
Here is both of my .java files
package inventorymain;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.BufferedReader;
public class InventoryMain
{
// Creates a new instance of InventoryMain
public InventoryMain()
{
}
// main method begins execution of java application
public static void main(String[] args)
{
//create inventory of pens
Inventory pens = new Inventory(); //creating the inventory with empty constructor
pens.setItemNum( 1 );
pens.setName( "pens" );
pens.setPrice( 1.59 );
pens.setUnits( 346 );
//create inventory of pencils
Inventory pencils = new Inventory(); //creating the inventory with empty constructor
pencils.setItemNum( 2 );
pencils.setName( "pencils" );
pencils.setPrice( .59 );
pencils.setUnits( 487 );
//create inventory of markers
Inventory markers = new Inventory(); //creating the inventory with empty constructor
markers.setItemNum( 3 );
markers.setName( "markers" );
markers.setPrice( 1.29 );
markers.setUnits( 168 );
//create inventory of paperclips
Inventory paperclips = new Inventory(); //creating the inventory with empty constructor
paperclips.setItemNum( 4 );
paperclips.setName( "paperclips" );
paperclips.setPrice( 1.19 );
paperclips.setUnits( 136 );
//create inventory of glue
Inventory glue = new Inventory(); //creating the inventory with empty constructor
glue.setItemNum( 5 );
glue.setName( "glue" );
glue.setPrice( .79 );
glue.setUnits( 72 );
//create inventory of tape
Inventory tape = new Inventory(); //creating the inventory with empty constructor
tape.setItemNum( 6 );
tape.setName( "tape" );
tape.setPrice( .49 );
tape.setUnits( 127 );
//create inventory of paper
Inventory paper = new Inventory(); //creating the inventory with empty constructor
paper.setItemNum( 7 );
paper.setName( "paper" );
paper.setPrice( 1.79 );
paper.setUnits( 203 );
//Display the inventories
pens.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
pencils.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
markers.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
paperclips.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
glue.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
tape.showInventory();
System.out.println(); //enters blank line
System.out.println(); //enters blank line
paper.showInventory();
}//end Main
}//end class InventoryMain
package inventorymain;
public class Inventory
{
private int itemNum;
private String name = new String();
private int units;
private double price;
//All getters and setters
public int getItemNum()
{
return itemNum;
}
public void setItemNum(int itemNum)
{
this.itemNum = itemNum;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getUnits()
{
return units;
}
public void setUnits(int units)
{
this.units = units;
}
public double getPrice()
{
return price;
}
public void setPrice(double price)
{
this.price = price;
}
//Constructors
Inventory() // Empty Constructor
{
}
//Constructor that takes arguments
Inventory(int _itemNum, String _name, int _units, double _price)//Constructor
{
itemNum = _itemNum;
name = _name;
units = _units;
price = _price;
}
//Computes value of inventory
public double valueOfInventory()
{
return price * units;
}
//displays the details of the inventory
public void showInventory()
{
System.out.println("Product Name: "+name);
System.out.println("Item Number: "+itemNum);
System.out.println("Number of Units: "+units);
System.out.println("Unit Price: $"+price);
//call the valueOfInventory() method and display the value
System.out.println("The value of " +name+ " left in the inventory is: $"+valueOfInventory());
}
}// end class Inventory
This might sound a bit strange, but are you sure that you jarred the same class files that netbeans was running?
Perhaps you had an older version that did not print anything?
I just tried the source you posted and it seemed to work.
I don't see any reason why it shouldn't work for you.
You shouldn't get silence.
If you still have the class files you used to create the jar, try
doing the following and see if program does the correct thing.
cd to the directory where inventorymain is
java -cp .\ inventorymain.InventoryMain
For a program as simple as this there shouldn't be too much that can go wrong when making an executable jar file.
