Balaji Sampath

How about using javascript !!

Hello Ranchers
For the following code below do we need to close the filewriter object in finally block even when i close BufferedWriter Object.


private void appendFile(String fileName) throws IOException{
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new FileWriter(fileName, true));
String textToFile= "Hello";
bw.write(textToFile);
bw.newLine();
bw.flush();
} catch (IOException ioe) {
throw ioe;

} finally { // close the file
if (bw != null)try {
bw.close();

} catch (IOException ioe2) {
throw ioe2;
}
} // end try/catch/finally





}
Suppose you call this method from say a class giving fileName has the input parameter the programs works fine but Occasionally it says Input file opened lot of resources .
So was not sure if i do need to close the filewriter instance opened..

The basic concept is , when you declare the inner or local variable that has the same name has the class or instance variable then the inner variable shadows the outer variable. This concept is called shadowing of variables.

Thanks
Balaji.S

I'm trying to use form at this point for storing data as type hidden and then do form.submit(). Is there a better way of doing this?

IM not sure if you have come acros the new technology "AJAX"..
http://www.adaptivepath.com/publications/essays/archives/000385.php

Just have a look and let me know if that was of any help??

hope this sample code will help your understanding!!!

public class StringIndexOf { public static void main(String[] args) { String inputString="Java Ranch"; int stringLength=inputString.length(); int greaterFromIndex= stringLength+1; int negativeFromIndex= -stringLength; System.out.println("Index equals String length : "+inputString.indexOf('R',stringLength)); System.out.println("Index greater than String Length: "+inputString.indexOf('R',greaterFromIndex)); System.out.println("Index is negative: "+inputString.indexOf('R',negativeFromIndex)); } }


And the output is as follows:

Index equals String Length: -1
Index greater than String Length: -1
Index is negative: 5

Thanks
Balaji.S

Jones,
I try to detail the above code below and let me know if at any chance it clarified.

public class ClassB { public ClassB(){ System.out.println("In the constructor ClassB()"); } public static void main(String[] args) { } }

Then under the same package have class A:
public class ClassA { public static void main(String[] args) { ClassB b= new ClassB(); } }


Now when u try to compile the class A and run it it did print the statement in the default constructor: In the constructor ClassB()

Since the classes marked public can be accesed from anywhere!!

If you try introduce a compile time error in class B and run class A it throws exception.
So im not sure what exactly ur looking in this question.

Thanks
Balaji.S

Hi there
When i happen to run the following code i got the output has

Intial value----> 0

Final Value ---->343

public class X{ static long story; public static void main(String[] args){ System.out.print("Initial Value"+story); if(story==0) { long tale = 343L; story = go(tale); } System.out.print("Final Value"+story); } static long go(long t) { return t++; } }


Let me know if this is what u need..

Thanks
Balaji.S

If u change the method1() in parents class like:
class Parent{ void method1(){ System.out.println("Parents method1() "); } void method2(){ System.out.println("Parents method2() "); method1(); } }
then the output would be
Parents method2()
Child method1()

Thanks
Balaji.S

In for SCJP 1.5.. Probable date july 10th

They do give one easy erase board or a rough paper for ur work.

Thanks
Balaji.S

Let me try to rephrase the question in this way:

class StringCreation{ public static void main(String args[]){ String[] x = new String[10]; } }

From the above code the first constructor to be called would be the default constructor StringCreation() .

I beleive thats the explanation u require?

Anywayz please to brief me if u need any further detail regarding the above code.

Thanks
Balaji.S

Doesnt the overriden method ned tohave access modifier more than the supeclass method???

Thanks
Balaji.S

It depends on the platform . For those who are taking SCJP 5.0 the above code compiles fine and the result would be 19,11.

Where did u get the k& B book from??

Hi tim
It would be a better understanding if you can post the question.(especially for those who dont hvae the book..)

Balaji