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Is advanced java a must?

Error is: java.lang.Integer cannot be cast to java.lang.String

Kindly help! Thanks in advance!

Please explain in simple terms.Thanks in advance!

Is it ok to use hashtable such that the key will be the fieldname and the value of the field is the value.... Any clue as to how to go about it! Thanks in advance!

import java.io.*;

import java.util.*;

import java.lang.*;

public class RuntymMgt

{

public static void main(String args[])

{

Runtime r=Runtime.getRuntime();

long m1=0,m2=0;

// int i[]=new int[1000];

Integer i[]=new Integer[1000];

System.out.println("Total Memory: "+m1);

m1=r.freeMemory();

System.out.println("Initial free memory: "+m1);

r.gc();

m1=r.freeMemory();

System.out.println("Free memory after garbage collection: "+m1);

for(int j=0;j<1000;j++)

i[j]=new Integer[j]; // THIS LINE IS GIVING THE ERROR!

m2=r.freeMemory();

System.out.println("Free memory after allocation: "+m2);

System.out.println("Memory used by allocation: " +(m1-m2));

for(int j=0;j<1000;j++)

i[j]=null;

r.gc();

m2=r.freeMemory();

System.out.println("Free memory after collecting discarded integers"+m2);

}

}

Options are:

A) 13.3

B) 10.8

C) 10.7

D) 11.4

1)In a party 10 take only tea 15 take tea and 8 take only coffee then what is the number of persons take either coffee or tea.(nos are not exact).

(2) In a college there are students who can play either football or cricket or both. 500 play cricket 220 play both and 600 play football .what is the total strength of the college.

(3)At an international conference, 100 delegates spoke English, 40 spoke French, and 20 spoke both English and French. How many delegates could speak at least one of these two languages?

(4)In a group of 400 readers who read science fiction or literacy works or both, 250 read science fiction and 230 read literacy works. How many read both science fiction and literacy works?

(5)In town of 500 people, 285 read Hindu and 212 read Indian express and 127read Times of India 20 read hindu and times of India and 29 read hindu and Indian express and 35 read times of India and Indian express. 50 read no news paper. Then how many read only one paper?

I need to establish connection with a system, then on that system a program is executed to capture the desktop and that image is sent to me via FTP... now to establish connection m using a TCP program, den for capturing the desktop mhavin code and for sending req for that image i ve a ftp client n server program...can this whole process be done in a single as in one client n one server pgm?

Please provide links! Thanks in advance!

Kindly help! Thanks in advance!!!

Need some really unique events...The usual ones are coding,debugging,web designing...Please help me outttttttttt...Thanks in advance!!!

import java.awt.*;

import java.applet.Applet;

import java.awt.event.*;

/*

* This displays a framed area. When the user drags within

* the area, this program displays a rectangle extending from

* where the user first pressed the mouse button to the current

* cursor location.

*/

public class RectangleDemo extends Applet

{

SelectionArea drawingPanel;

Label label;

public void init() {

GridBagLayout gridBag = new GridBagLayout();

GridBagConstraints c = new GridBagConstraints();

setLayout(gridBag);

drawingPanel = new SelectionArea(this);

c.fill = GridBagConstraints.BOTH;

c.weighty = 1.0;

c.gridwidth = GridBagConstraints.REMAINDER; //end row

gridBag.setConstraints(drawingPanel, c);

add(drawingPanel);

label = new Label("Drag within the framed area.");

c.fill = GridBagConstraints.HORIZONTAL;

c.weightx = 1.0;

c.weighty = 0.0;

gridBag.setConstraints(label, c);

add(label);

drawingPanel.setVisible(true);

validate();

}

public void paint(Graphics g){

drawingPanel.repaint();

}

public void update(Graphics g){

paint(g);

}

}

prgname: Inflate.java

import java.io.*;

import java.util.*;

public class InflateTime

{

public static void main(String [] args)

{

String filename = "time.txt";

/*if(args.length > 0)

{

filename = args[0];

}*/

PersistentTime t = null;

FileInputStream fis = null;

ObjectInputStream in = null;

try

{

fis = new FileInputStream(filename);

in = new ObjectInputStream(fis);

t = (PersistentTime)in.readObject();

in.close();

}

catch(IOException ex)

{

ex.printStackTrace();

}

catch(ClassNotFoundException ex)

{

ex.printStackTrace();

}

// print out restored time

System.out.println("Flattened time: " + t.getTime());

System.out.println();

// print out the current time

System.out.println("Current time: " + Calendar.getInstance().getTime());

}

}

Prgname:Flatten.java

import java.io.*;

import java.util.Date;

import java.util.Calendar;

class PersistentTime implements Serializable

{

private Date time;

PersistentTime()

{

time = Calendar.getInstance().getTime();

}

public Date getTime()

{

return time;

}

}

public class Flatten

{

public static void main(String [] args)

{

PersistentTime t=new PersistentTime();

try

{

FileOutputStream fs=new FileOutputStream("time.txt");

ObjectOutputStream os=new ObjectOutputStream(fs);

os.writeObject(t);

os.close();

}

catch(Exception e)

{}

}

}

on running Inflatetime.java an output comes which aint that clear pls explain this prgm to me...THANKS A TON...!!!

Thanks a ton in advance...

this program is giving an error..what needs to be corrected pls temme..THANQ...