asked on java package issue
Hi,
I am running below example
http://www.avajava.com/tutorials/lessons/what-is-the-transient-keyword-used-for.html
I created the TransientDemo.java file under below folder
C:\Users\Desktop\gpfolder\
The TransientDemo.java file has package called cakes.
package cakes;
import java.io.FileInputStream;
import java.io.FileNotFoundExcept
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
I opened command prompt in my windows laptop went to below folder
C:\Users\Desktop\gpfolder\
so now I gave compile below command
javac TransientDemo.java (i see class file generated at C:\Users\Desktop\gpfolder\
and run command at same location (C:\Users\Desktop\gpfolder
java TransientDemo
I got error message saying the class not found.
when I comment the package statement everything works perfect.
//package cakes;
import java.io.FileInputStream;
import java.io.FileNotFoundExcept
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
so now again I gave compile below command
javac TransientDemo.java (i see class file generated at C:\Users\Desktop\gpfolder\
and run command at same location (C:\Users\Desktop\gpfolder
java TransientDemo
I got output without error.
Can you please advise what is the issue with package statement.
what is meaning of file extension of mydemo.ser.
what are practical uses of the transient
please advise
Any links resources ideas highly appreciated. Thanks in advance
I am running below example
http://www.avajava.com/tutorials/lessons/what-is-the-transient-keyword-used-for.html
I created the TransientDemo.java file under below folder
C:\Users\Desktop\gpfolder\
The TransientDemo.java file has package called cakes.
package cakes;
import java.io.FileInputStream;
import java.io.FileNotFoundExcept
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
I opened command prompt in my windows laptop went to below folder
C:\Users\Desktop\gpfolder\
so now I gave compile below command
javac TransientDemo.java (i see class file generated at C:\Users\Desktop\gpfolder\
and run command at same location (C:\Users\Desktop\gpfolder
java TransientDemo
I got error message saying the class not found.
when I comment the package statement everything works perfect.
//package cakes;
import java.io.FileInputStream;
import java.io.FileNotFoundExcept
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
so now again I gave compile below command
javac TransientDemo.java (i see class file generated at C:\Users\Desktop\gpfolder\
and run command at same location (C:\Users\Desktop\gpfolder
java TransientDemo
I got output without error.
Can you please advise what is the issue with package statement.
what is meaning of file extension of mydemo.ser.
what are practical uses of the transient
please advise
Any links resources ideas highly appreciated. Thanks in advance
Java EEJavaJSP
Last Comment
gudii9
ASKER CERTIFIED SOLUTION
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ASKER
If cakes folder is not there then does javac command creates it for us or just complains saying cakes folder is not there or it simply puts class file at C:\Users\Desktop\gpfolder\
Please advise
Please advise
ASKER
when i gave
javac TransientDemo.java -d .
it created
cakes folder under
C:\Users\Desktop\gpfolder\
then
it created two class files as below and put them under C:\Users\Desktop\gpfolder\
TransientDemo.class
TransientDemo$1MyDemo.clas
what is the purpose of TransientDemo$1MyDemo.clas
Also what is the use of -d . as in the command
javac TransientDemo.java -d .
please advise
javac TransientDemo.java -d .
it created
cakes folder under
C:\Users\Desktop\gpfolder\
then
it created two class files as below and put them under C:\Users\Desktop\gpfolder\
TransientDemo.class
TransientDemo$1MyDemo.clas
what is the purpose of TransientDemo$1MyDemo.clas
Also what is the use of -d . as in the command
javac TransientDemo.java -d .
please advise
ASKER
instead of javac TransientDemo.java -d .
when i gave
javac TransientDemo.java
it did not give error. Instead it created class file in folder below C:\Users\Desktop\gpfolder\
which i feel wrong. I wonder why it happened like that. please advise
when i gave
javac TransientDemo.java
it did not give error. Instead it created class file in folder below C:\Users\Desktop\gpfolder\
which i feel wrong. I wonder why it happened like that. please advise
SOLUTION
THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
ASKER
If cakes folder is not there then does javac command creates it for us
Yes.
But in below case it did not create cake folder. Why?
instead of javac TransientDemo.java -d .
when i gave
javac TransientDemo.java
it did not give error. Instead it created class file in folder below C:\Users\Desktop\gpfolder\gpmy\Sampl eCode\Onli ne\avajava \stuff
which i feel wrong. I wonder why it happened like that. please advise
what is the significance of '-d ' at end as below
javac TransientDemo.java -d .
ASKER
It means that you have another class called MyDemo inside the TransientDemo class.I see inner class as belw but i wonder what is the purpose or practial use of inner class here.
public class TransientDemo {
public static void main(String[] args) {
class MyDemo implements Serializable {
private static final long serialVersionUID = 1L;
Please advise
The -d means "destination", it is the destination of the compiled classes.
For your second question, read an extensive answer at javaworld and stackoverflow.
For your second question, read an extensive answer at javaworld and stackoverflow.
ASKER
If cakes folder is not there then does javac command creates it for us
Yes
Does it create cakes folder in which of below scenarios (with or without -d.)
Scenario A: javac TransientDemo.java
or
Scenario B : javac TransientDemo.java -d .
i am assuming below flow
I created the TransientDemo.java file under below folder
C:\Users\Desktop\gpfolder\gpmy\Sampl eCode\Onli ne\avajava \stuff
The TransientDemo.java file has package called cakes.
package cakes;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
I opened command prompt in my windows laptop went to below folder
C:\Users\Desktop\gpfolder\gpmy\Sampl eCode\Onli ne\avajava \stuff
ASKER
so what happens when
also javac command with or without -d
javac TransientDemo.java -d .
javac TransientDemo.java
In what case cakes folder created with which javac command. please advise
I created the TransientDemo.java file under below folder
C:\Users\Desktop\gpfolder\gpmy\Sampl eCode\Onli ne\avajava \stuff
The TransientDemo.java file has package called cakes.
package cakes;(here with or without package statement cakes)
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class TransientDemo {
public static void main(String[] args) {
also javac command with or without -d
javac TransientDemo.java -d .
javac TransientDemo.java
In what case cakes folder created with which javac command. please advise
you mean below statement instead of above to compile it
javac cakes.TransientDemo.java
Or you mean the run statement itself when you say second statement as below.
>>The second statement tells java to find the class called TransientDemo in the cakes folder.
Please advise