Print out the date

[ŖàΫ ỏƒ Ңόρę]

Hello

I wrote the following code to print out the current date.

After I run it, it didn't work !!

import java.util.Date;
import java.util.Locale;
import java.util.Random;
import java.text.*;
public class Try1 {
	public static void main(String[] args){
		
		Locale currentLocale = null;
		Date today;
		String dateOut;
		DateFormat dateFormatter;

		dateFormatter = DateFormat.getDateInstance(DateFormat.DEFAULT,currentLocale);
		today = new Date();
		dateOut = dateFormatter.format(today);

		System.out.println(dateOut + " " + currentLocale.toString());
		
	}
	}

[gcalvin]

Other than currentLocale being null (because you set it to null), what didn't work?

-Gary-

[ŖàΫ ỏƒ Ңόρę]

Other than currentLocale being null (because you set it to null), what didn't work?

-Gary-

I finally figured it out

import java.util.Date;
import java.util.Locale;
import java.util.Random;
import java.text.*;
public class Try1 {
	public static void main(String[] args){
		Locale alocal = new Locale("CANADA");
		Date today;
		String dateOut;

		DateFormat dateFormatter;
		dateFormatter = DateFormat.getDateInstance(DateFormat.DEFAULT,
				alocal);
		today = new Date();
		dateOut = dateFormatter.format(today);

		System.out.println(dateOut + " " + alocal.toString());
		
	}
	}

I need this code to use in an applet

when I use it, it didn't work

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

public class Management extends JApplet implements ActionListener{
	
	private JLabel label;
	private JLabel labelDate;
	private JButton button;
	private static Locale alocal = new Locale("CANADA");
	private static Date today;
	private static String dateOut;
	private static DateFormat dateFormatter;
	
	
	public void init(){
		label = new JLabel("Welcome in Management Programe");
		labelDate = new JLabel(dateOut);
		button = new JButton("Entrance Panel");
		
		button.addActionListener(this);
		
		Container contentPane = getContentPane();
		contentPane.setLayout(new FlowLayout());
		contentPane.add(label);
		contentPane.add(labelDate);
		contentPane.add(button);
	}
	
	public void actionPerformed(ActionEvent eve){
		
	}
	public static void main(String[] args){
		
		dateFormatter = DateFormat.getDateInstance(DateFormat.DEFAULT,
				alocal);
		today = new Date();
		dateOut = dateFormatter.format(today);
	}
}

I want to display the current date in a label.

[gcalvin]

Well, "CANADA" is not a valid locale string, as far as I know, but that doesn't seem to matter much here. The bigger problem is that you initialize labelDate with the empty String dateOut, then when you point the ivar dateOut to a different String in main() you expect labelDate to get its new value. It doesn't work that way. You need to call labelDate's setText() method.

-Gary-

[ŖàΫ ỏƒ Ңόρę]

Well, "CANADA" is not a valid locale string, as far as I know, but that doesn't seem to matter much here. The bigger problem is that you initialize labelDate with the empty String dateOut, then when you point the ivar dateOut to a different String in main() you expect labelDate to get its new value. It doesn't work that way. You need to call labelDate's setText() method.

-Gary-

Hi Gary

It works properly before I use it in the applet.

I did what you said but when I run it, it gives me null instead of the date

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

public class Management extends JApplet implements ActionListener{
	
	private JLabel label;
	private JLabel labelDate;
	private JButton button;
	private static Locale alocal;
	private static Date today;
	private static String dateOut;
	private static DateFormat dateFormatter;
	
	
	public void init(){
		label = new JLabel("Welcome in Management Programe");
		labelDate = new JLabel("");
		
		button = new JButton("Entrance Panel");
		
		button.addActionListener(this);
		
		Container contentPane = getContentPane();
		contentPane.setLayout(new FlowLayout());
		contentPane.add(label);
		contentPane.add(labelDate);
		contentPane.add(button);
	}
	
	public void actionPerformed(ActionEvent eve){
		labelDate.setText(dateOut);
	}
	public static void main(String[] args){
		alocal  = new Locale("CANADA");
		dateFormatter = DateFormat.getDateInstance(DateFormat.DEFAULT,
				alocal);
		today = new Date();
		dateOut = dateFormatter.format(today);
		
	}
}

[gcalvin]

The main() method doesn't get run in a JApplet (unless you explicitly run it, which you typically wouldn't). Move your main() code into init() (and study up on Locale a little more).

-Gary-

[ŖàΫ ỏƒ Ңόρę]

The main() method doesn't get run in a JApplet (unless you explicitly run it, which you typically wouldn't). Move your main() code into init() (and study up on Locale a little more).

-Gary-

I finally discovered it

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

public class Management extends JApplet implements ActionListener{
	
	private JLabel label;
	private JLabel labelDate;
	private JButton button;
	private static Locale alocal;
	private static Date today;
	private static String dateOut;
	private static DateFormat dateFormatter;
	
	
	public void init(){
		
		alocal  = new Locale("CANADA");
		dateFormatter = DateFormat.getDateInstance(DateFormat.DEFAULT,
				alocal);
		today = new Date();
		dateOut = dateFormatter.format(today);
		
		label = new JLabel("Welcome in Management Programe");
		button = new JButton("Entrance Panel");
		labelDate = new JLabel("");
		labelDate.setText(dateOut);
		
		button.addActionListener(this);
		
		
		Container contentPane = getContentPane();
		contentPane.setLayout(new FlowLayout());
		contentPane.add(label);
		contentPane.add(labelDate);
		contentPane.add(button);
		
		
			
			
	}
	
	public void actionPerformed(ActionEvent eve){
		String str = JOptionPane.showInputDialog(getContentPane(), "Enter the user name");
		if(str == "NsNs"){
			 JOptionPane.showMessageDialog(getContentPane(), "Welcome Mr.NsNs");		
		}else{
			JOptionPane.showMessageDialog(getContentPane(), "Invalid Name !!","Error" ,JOptionPane.ERROR_MESSAGE);
	}
	}
}

when I wrote this code, it didn't give any mistakes

but the problem when I enter NsNs in the inputDialog it gives me "Invalid Name".

I hope you can help me with this problem

thanks

[gcalvin]

That is because the String that you enter is not == to "NsNs". I will anticipate your insistence that "Yes it is!!" and respond "No, it isn't" and point you to the Java documentation.

-Gary-

[ŖàΫ ỏƒ Ңόρę]

Gary, you really confused me !

I enter the same string that is in the if statement, so it should be right and it should give me Welcome ..!!

could you please explain more ?

appreciate that brother

thanks

[JosAH]

Gary, you really confused me !

I enter the same string that is in the if statement, so it should be right and it should give me Welcome ..!!

could you please explain more ?

appreciate that brother

thanks

Did you ever read a Java tutorial/book? If you did you'd known that you can't compare objects for equal content using the == operator; sometimes it works for reasons I won't explain here but in general you can't use the == operator for those purposes as Gary already said. No need to protest, you can't use it, no matter if you are definitely, positively sure that those Strings are equal. Read a tutorial and don't guess and don't assume that Java (or any other programming language) works the way you want it to work.

kind regards,

Jos