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If you are expecting someone to write this code for you, then I am afraid you have come to the wrong place. You should first write the required mathematical algorithm in plain language, and then convert that to code. When you have a specific question then come back here and people will try to help you.
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Please how can i input jquery slideshows in my web?
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This is the Java forum; try the Javascript forum for jQuery issues.
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please how can i start using java for programming (not just in command prompt)?
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class NewThread implements Runnable {
String name;
Thread t;
NewThread(String threadname) {
name = threadname;
t = new Thread(this, name);
System.out.println("New thread: " + t);
t.start();
}
public void run() {
try {
for (int i = 5; i > 0; i--) {
System.out.println(name + ": " + i);
Thread.sleep(1000);
}
} catch (InterruptedException e) {
System.out.println(name + " interrupted.");
}
System.out.println(name + " exiting.");
}
}
public class Main {
public static void main(String args[]) {
NewThread ob1 = new NewThread("One");
NewThread ob2 = new NewThread("Two");
NewThread ob3 = new NewThread("Three");
System.out.println("Thread One is alive: " + ob1.t.isAlive());
System.out.println("Thread Two is alive: " + ob2.t.isAlive());
System.out.println("Thread Three is alive: " + ob3.t.isAlive());
try {
System.out.println("Waiting for threads to finish.");
ob1.t.join();
ob2.t.join();
ob3.t.join();
} catch (InterruptedException e) {
System.out.println("Main thread Interrupted");
}
System.out.println("Thread One is alive: " + ob1.t.isAlive());
System.out.println("Thread Two is alive: " + ob2.t.isAlive());
System.out.println("Thread Three is alive: " + ob3.t.isAlive());
System.out.println("Main thread exiting.");
}
}
Joining the default main thread with a background thread
public class Main {
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
System.out.println("sleeping for 5 seconds.");
try {
Thread.sleep(5000);
} catch (Exception ie) {
}
System.out.println("Worker thread is done");
}
};
Thread thd = new Thread(r);
thd.start();
System.out.println("main thread is running.");
try {
Thread.sleep(2000);
} catch (InterruptedException ie) {
}
System.out.println("main thread is waiting for worker thread.");
try {
thd.join();
} catch (InterruptedException ie) {
}
}
}
in these wt is meaning of ob1.t.join()
like statement plz anyone
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It creates a delay until the thread completes. You should always check the documentation[^] first.
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How JVM deals with machine to execute a java program and what's about its register organization and memory management in reference of real machine ?
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OK...I am new to programming and I am trying to use existing code for a project. Every time I try to run it, it comes abck saying there is "no main class" what am I doing worng and what should I do to fix it? Please help me and do it with "semi-retarded jargon" I will not benefit from your help if the responses are too technical.
Please see below:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.NumberFormat;
import java.util.Scanner;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
class Donor
{
private String donorName;
private String nameOfCharity;
private double amountPledged;
public Donor(String donorName, String nameOfCharity, double amountPledged) {
this.donorName = donorName;
this.nameOfCharity = nameOfCharity;
this.amountPledged = amountPledged;
}
public String getDonorName() {
return donorName;
}
public void setDonorName(String donorName) {
this.donorName = donorName;
}
public String getNameOfCharity() {
return nameOfCharity;
}
public void setNameOfCharity(String nameOfCharity) {
this.nameOfCharity = nameOfCharity;
}
public double getAmountPledged() {
return amountPledged;
}
public void setAmountPledged(double amountPledged) {
this.amountPledged = amountPledged;
}
}
public class Charity extends JFrame implements ActionListener
{
private JLabel donorNameLabel;
private JLabel nameOfCharityLabel;
private JLabel amountPledgedLabel;
private JTextField donorNameField;
private JTextField nameOfCharityField;
private JFormattedTextField amountPledgedField;
private JButton addButton;
private JButton viewCharities;
private JButton addNewCharity;
private JPanel firstPanel;
private JPanel secondPanel;
private NumberFormat amountNumberFormat;
private JTable charitiesTable;
private JTableHeader tableHeader;
private DefaultTableModel defaultTableModel;
private InputStream fileInputStream;
private DataInputStream dataInputStream;
private Scanner fileInput;
@SuppressWarnings("LeakingThisInConstructor")
public Charity()
{
setSize(650, 700);
setLayout(new BorderLayout());
setTitle("Charity");
setDefaultCloseOperation(EXIT_ON_CLOSE);
donorNameLabel = new JLabel("Enter Donor Name");
nameOfCharityLabel = new JLabel("Enter Charity Name");
amountPledgedLabel = new JLabel("Enter Amount Pledged");
donorNameField = new JTextField(25);
nameOfCharityField = new JTextField(25);
amountNumberFormat = NumberFormat.getInstance();
amountPledgedField = new JFormattedTextField(amountNumberFormat);
amountPledgedField.setColumns(25);
firstPanel = new JPanel(new GridLayout(6,1,0,10));
firstPanel.add(donorNameLabel);
firstPanel.add(donorNameField);
firstPanel.add(nameOfCharityLabel);
firstPanel.add(nameOfCharityField);
firstPanel.add(amountPledgedLabel);
firstPanel.add(amountPledgedField);
addButton = new JButton("Add Charity");
addButton.addActionListener(this);
addNewCharity = new JButton("Add New Charity");
addNewCharity.addActionListener(this);
viewCharities = new JButton("View Charity List");
viewCharities.addActionListener(this);
secondPanel = new JPanel();
secondPanel.add(addButton);
secondPanel.add(addNewCharity);
secondPanel.add(viewCharities);
defaultTableModel = new DefaultTableModel();
defaultTableModel.addColumn(new String("Donor Name"));
defaultTableModel.addColumn(new String("Charity Name"));
defaultTableModel.addColumn(new String("Amount Pledged"));
charitiesTable = new JTable(defaultTableModel);
charitiesTable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
tableHeader = charitiesTable.getTableHeader();
tableHeader.setBackground(Color.yellow);
JScrollPane scrollPane = new JScrollPane(charitiesTable);
secondPanel.add(scrollPane);
add(firstPanel,BorderLayout.NORTH);
add(secondPanel,BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent event)
{
Object eventSource = event.getSource();
String donorName;
String charityName;
String amountPledgedText;
double amountPledged;
Donor donor;
boolean isValidInput = true;
if(eventSource == addButton)
{
donorName = donorNameField.getText().trim();
charityName = nameOfCharityField.getText().trim();
amountPledgedText = amountPledgedField.getText().trim();
if(donorName.equals(""))
{
JOptionPane.showMessageDialog(this, "Please enter donor's name.", "Error", JOptionPane.ERROR_MESSAGE);
isValidInput = false;
}
if(charityName.equals(""))
{
JOptionPane.showMessageDialog(this, "Please enter charity name.", "Error", JOptionPane.ERROR_MESSAGE);
isValidInput = false;
}
if(amountPledgedText.equals(""))
{
JOptionPane.showMessageDialog(this, "Please enter amount pledged.", "Error", JOptionPane.ERROR_MESSAGE);
isValidInput = false;
}
if(isValidInput)
{
amountPledged = ((Number)(amountPledgedField.getValue())).doubleValue();
if(amountPledged<0.0)
{
JOptionPane.showMessageDialog(this, "Please enter a valid amount.", "Error", JOptionPane.ERROR_MESSAGE);
return;
}
donor = new Donor(donorName, charityName, amountPledged);
writeToFile(donor);
JOptionPane.showMessageDialog(this, "Charity has been successfully added.", "Charity Added", JOptionPane.INFORMATION_MESSAGE);
}
}
else if(eventSource == addNewCharity)
{
donorNameField.setText("");
nameOfCharityField.setText("");
amountPledgedField.setText("");
}
else if(eventSource == viewCharities)
{
clearTable();
Vector<Donor> donorList = readFile();
int numberOfCharities = donorList.size();
for(int i=0;i<numberOfCharities;i++)
{
donor = (Donor)donorList.elementAt(i);
defaultTableModel.insertRow(charitiesTable.getRowCount(), new Object[]{donor.getDonorName(),donor.getNameOfCharity(),"$"+donor.getAmountPledged()});
}
}
}
private void clearTable()
{
int numberOfRows = charitiesTable.getRowCount();
while(numberOfRows>0)
{
defaultTableModel.removeRow(0);
numberOfRows--;
}
}
private boolean writeToFile(Donor donor)
{
FileWriter fstream;
try {
String filePath = "Charity List.txt";
fstream = new FileWriter(filePath,true);
BufferedWriter out = new BufferedWriter(fstream);
out.write(donor.getDonorName());
out.write("\r\n");
out.write(donor.getNameOfCharity());
out.write("\r\n");
out.write(""+donor.getAmountPledged());
out.write("\r\n");
out.close();
return true;
}
catch (IOException e1)
{
e1.printStackTrace();
return false;
}
}
private Vector<Donor> readFile()
{
String charityDetails = "";
String nameOfDonor = "";
String nameOfCharity = "";
String amount = "";
Vector<Donor> donorList = new Vector<Donor>();
try
{
fileInputStream = new FileInputStream("Charity List.txt");
}
catch (FileNotFoundException e)
{
JOptionPane.showMessageDialog(this, "Charity List not found.");
return null;
}
dataInputStream = new DataInputStream(fileInputStream);
fileInput = new Scanner(new InputStreamReader(dataInputStream));
try
{
if(fileInputStream==null)
{
JOptionPane.showMessageDialog(this, "Charity List not found.");
return null;
}
while(fileInput.hasNext())
{
if(fileInput.hasNext())
{
nameOfDonor = fileInput.nextLine();
}
if(fileInput.hasNext())
{
nameOfCharity = fileInput.nextLine();
}
if(fileInput.hasNext())
{
amount = fileInput.nextLine();
}
Donor donor = new Donor(nameOfDonor, nameOfCharity, Double.parseDouble(amount));
donorList.addElement(donor);
}
dataInputStream.close();
}
catch(FileNotFoundException e)
{
System.out.println("File not found.");
return null;
}
catch (IOException e)
{
e.printStackTrace();
return null;
}
return donorList;
}
public static void main(String[] args)
{
Charity charity = new Charity();
charity.setVisible(true);
}
}
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i am a (mca)2014 paasout so i am learn selenium webdriver so ple help me how to instal seleniumweb driver.
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The Best Scenario to use Multithreading in Bannking Domain Project
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The best scenario is to ask the business questions first and then derive the technical design from it, not the other way around.
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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Anybody having the apps code and tips also send to me its very urgent am going to use hospital like study name,patient id,patient name and my text message voice call play thats all
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Vijaya Kumar wrote: Anybody having the apps code and tips Please use Google or Bing to do your own research.
Vijaya Kumar wrote: its very urgent No, it really isn't.
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Google had so many different results and some were full of jargon which made it hard to understand, so if anyone can recommend any good sites they know of for programming beginners it'd be a massive help ,thanks
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