Megha kharde

Thank you Steve.

Assuming i have taken laptop with me, i would only need a os installed in it with a browser (as i would be able to access the Internet and download other softwares)

Congratulations Steve

I also want to register for the exam but have confusion about the registration process.

how long have you registered for the exam before appearing for the real exam?Should i make the preparation and then register or i can register first and then start preparing.

Why are you using two different Scanner objects?

Scanner DiceOrCoinScanner = new Scanner(System.in);
Scanner NumberOfDiceScanner = new Scanner(System.in);

however you could have used a single Scanner object. Am i right? If anybody knows please correct me.

Thank you Campbell for providing such a detailed explaination.
Realy helpfull for beginers like me.

try this

for(;;){
System.out.println(" ");
if(true) continue;
else if(true)break;
else return 0 ;
}

for(;;){
continue;
break;
return 0 ;
}

Thank you Matthew for your reply

When to use ObjectOutputStream?
does anybody know?

Bear Bibeault,
It would be a cheating to my soul.
I should stick to the answer whcih is on my own experience, and not of someone else's experience.

Thank you for giving me a reminder.

Campbell Ritchie wrote:Have you never helped anybody with a problem?

i have helped, but the interviewer was never satisfied with my answer

i would like to add one point
by making instance variables private we can protect them from assigning them to unwanted values . In public accessor method (in setters) we can
add the code to check for allowed values.
For example, for a student we do not want to set its roll no to a negative value

Eric Pascarello wrote:

Megha kharde wrote:I think you can use <META HTTP-EQUIV="Refresh" CONTENT="0>
which instructs a web browser to automatically refresh the current web page or frame after a given time interval, using an HTML meta element with the http-equiv parameter set to "refresh" and a content parameter giving the time interval in seconds.

Also creating an infinite loop of refreshing.

Eric

I am a beginer in Java. I came across this use of meta refresh while studing a struts2 example from Struts2 In Action to redirect the request from an index.html page
<META HTTP-EQUIV="Refresh" CONTENT="0;URL=Menu.action">

I think you can use <META HTTP-EQUIV="Refresh" CONTENT="0>
which instructs a web browser to automatically refresh the current web page or frame after a given time interval, using an HTML meta element with the http-equiv parameter set to "refresh" and a content parameter giving the time interval in seconds.

FileOutputStream f=new FileOutputStream("out.ser");
f.write();

Here, this write() method argument is of type int, so Unicode character value of '\n' i.e 10 is written to the file .
but if i use ObjectOutputStream and use its writeChar(char) method instead of FileOutOutStream newline character is writene to the file .
public void writeChar(){ char x = '\n'; FileOutputStream f=new FileOutputStream("out.txt"); f.write(x); //writes 10 f.close } public void readChar(){ FileInputStream fi=new FileInputStream("out.txt"); System.out.println(r.read()); //prints 10 }

In my existing serializable Car class i tried to use ObjectOutputStream and its writechar(char) method

import java.io.*; class Car implements Serializable { public int speeds; public int wheels; private void writeObject(ObjectOutputStream oos) throws IOException { oos.writeInt(speeds); oos.writeInt(wheels); } private void readObject(ObjectInputStream ois) throws IOException { speeds = ois.readInt(); wheels = ois.readInt(); } } public class TestCar{ public static void main(String[] args) throws IOException { writeCar(); readCar(); } public static void readCar() throws IOException { FileInputStream fi=new FileInputStream("out.txt"); ObjectInputStream in=new ObjectInputStream(fi); try { Car c1=(Car) in.readObject(); System.out.print(c1.speeds); System.out.print(in.readChar()); //prints newline System.out.print(c1.wheels); //System.out.println(fi.read()); } catch (Exception e) { e.printStackTrace(); } } public static void writeCar() throws IOException { Car c=new Car(); c.speeds=100; c.wheels=4; char x = '\n'; FileOutputStream f=new FileOutputStream("out.txt"); //f.write(x); ObjectOutputStream out=new ObjectOutputStream(f); out.writeObject(c); out.writeChar(x); //writes '\n' i.e newline char to the file out.close(); f.close(); } }