Java Technologie

[Bathuyag]

Java хэлний тухай сэдэв заавал байсан нь дээр байхаа.
Би хувтдаа жава дээр бичдэг оюутан хүн шүү дээ.
Заа тэгээд Жава дээр асуудал гарвал ярилцацгаая.
Убунту Programming бол маш сайн дэмждэг Platform шүү.

[Khaschuluu]

Хуягаа юу ашиглаж эдитэрлэж байна?

NetBeans Eclipse хоёр л хүчтэй өрсөлдөгч нар юм шиг

Гэхдээ би бол зөвхөн эдитэрлэх дээр бол vim ийг санал болгомоор байна. Хамгийн хүчтэй багаж.

http://cosmosbirds.blogspot.com/ дээр нэг java гийн хичээл эхлүүлээд орхисон байгаа. Түүнийг үргэлжүүлнээ

[Bathuyag]

Би үнэгүй хамгийн хүчирхэг тэгээд ашиглахад хялбараар нь Notepad ашигладаг хэхэ.
Тоглосын eclipse netbeans 2 ууланг нь ажиглаж байна даа.

[Bathuyag]

Хүмүүсээ Java хэлний талаар мэддэг чаддаг бүхнээ ярилцая би
одоо гар утасны прогамчлал хийж сайгаа
Bluetooth ээр олон хэрэглэгч зэрэг холбогдох арга байдаг юм байна
хийж байсан хүн байна уу Source харалций

[XXman]

Netbeans- ийг одоо гүйцэх editor байвал надад шууд тэр гээд хэлчээрээ хэхэ Netbeans бол гайхамшиг шүү дээ. Huyaga чи бид 2 нэг хичээл үзэж байгаан байна.

[Bathuyag]

Хувын чанартай юм ярихыг хүсснгүй уг нь яримаар л.
Netbeans бол үнэгүй editor дотроо давгүй сайн нь шүү.
Хөнгөн хурданыг нь бодвол арай өөр editor гарч ирнээ угааса. Нэтбенс жоохн удаан шү дэ.

[Bathuyag]

За нэг тооны машин бичсэн ухаантай шүү сонирхоорой.

Код: Бүгдийг сонгох

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;

public class Calculator extends JFrame implements ActionListener{
	// Variables
	final int MAX_INPUT_LENGTH = 20;
	final int INPUT_MODE = 0;
	final int RESULT_MODE = 1;
	final int ERROR_MODE = 2;
	int displayMode;

	boolean clearOnNextDigit, percent;
	double lastNumber;
	String lastOperator;

	private JMenu jmenuFile, jmenuHelp;
	private JMenuItem jmenuitemExit, jmenuitemAbout;
	
	private JLabel jlbOutput;
	private JButton jbnButtons[];
	private JPanel jplMaster, jplBackSpace, jplControl;
	
	/*
	 * Font(String name, int style, int size)
      Creates a new Font from the specified name, style and point size.
	 */
	
	Font f12 = new Font("Times New Roman", 0, 12);
	Font f121 = new Font("Times New Roman", 1, 12);
	
	// Constructor 
	public Calculator() 
	{
		/* Set Up the JMenuBar.
		 * Have Provided All JMenu's with Mnemonics
		 * Have Provided some JMenuItem components with Keyboard Accelerators
		 */ 
		
		jmenuFile = new JMenu("File");
		jmenuFile.setFont(f121);
		jmenuFile.setMnemonic(KeyEvent.VK_F);
		
		jmenuitemExit = new JMenuItem("Exit");
		jmenuitemExit.setFont(f12);
		jmenuitemExit.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_X, 
													ActionEvent.CTRL_MASK));
		jmenuFile.add(jmenuitemExit);

		jmenuHelp = new JMenu("Tuhai");
		jmenuHelp.setFont(f121);
		jmenuHelp.setMnemonic(KeyEvent.VK_H);

		jmenuitemAbout = new JMenuItem("Calculator in tuhai");
		jmenuitemAbout.setFont(f12);
		jmenuHelp.add(jmenuitemAbout);
		
		JMenuBar mb = new JMenuBar();
		mb.add(jmenuFile);
		mb.add(jmenuHelp);
		setJMenuBar(mb);
		
		//Set frame layout manager

		setBackground(Color.gray);

		jplMaster = new JPanel();

		jlbOutput = new JLabel("0");
		jlbOutput.setHorizontalTextPosition(JLabel.RIGHT);
		jlbOutput.setBackground(Color.WHITE);
		jlbOutput.setOpaque(true);
		
		// Add components to frame
		getContentPane().add(jlbOutput, BorderLayout.NORTH);

		jbnButtons = new JButton[23];
//		GridLayout(int rows, int cols, int hgap, int vgap) 

		JPanel jplButtons = new JPanel();			// container for Jbuttons

		// Create numeric Jbuttons
		for (int i=0; i<=9; i++)
		{
			// set each Jbutton label to the value of index
			jbnButtons[i] = new JButton(String.valueOf(i));
		}

		// Create operator Jbuttons
		jbnButtons[10] = new JButton("+/-");
		jbnButtons[11] = new JButton(".");
		jbnButtons[12] = new JButton("=");
		jbnButtons[13] = new JButton("/");
		jbnButtons[14] = new JButton("*");
		jbnButtons[15] = new JButton("-");
		jbnButtons[16] = new JButton("+");
		jbnButtons[17] = new JButton("sqrt");
		jbnButtons[18] = new JButton("1/x");
		jbnButtons[19] = new JButton("%");
		
		jplBackSpace = new JPanel();
		jplBackSpace.setLayout(new GridLayout(1, 1, 2, 2));

		jbnButtons[20] = new JButton("Backspace");
		jplBackSpace.add(jbnButtons[20]);

		jplControl = new JPanel();
		jplControl.setLayout(new GridLayout(1, 2, 2 ,2));

		jbnButtons[21] = new JButton(" CE ");
		jbnButtons[22] = new JButton("C");

		jplControl.add(jbnButtons[21]);
		jplControl.add(jbnButtons[22]);

//		Setting all Numbered JButton's to Blue. The rest to Red
		for (int i=0; i<jbnButtons.length; i++)	{
			jbnButtons[i].setFont(f12);

			if (i<10)
				jbnButtons[i].setForeground(Color.blue);
				
			else
				jbnButtons[i].setForeground(Color.red);
		}
	
		// Set panel layout manager for a 4 by 5 grid
		jplButtons.setLayout(new GridLayout(4, 5, 2, 2));
		
		//Add buttons to keypad panel starting at top left
		// First row
		for(int i=7; i<=9; i++)		{
			jplButtons.add(jbnButtons[i]);
		}
		
		// add button / and sqrt
		jplButtons.add(jbnButtons[13]);
		jplButtons.add(jbnButtons[17]);
		
		// Second row
		for(int i=4; i<=6; i++)
		{
			jplButtons.add(jbnButtons[i]);
		}
		
		// add button * and x^2
		jplButtons.add(jbnButtons[14]);
		jplButtons.add(jbnButtons[18]);

		// Third row
		for( int i=1; i<=3; i++)
		{
			jplButtons.add(jbnButtons[i]);
		}
		
		//adds button - and %
		jplButtons.add(jbnButtons[15]);
		jplButtons.add(jbnButtons[19]);
		
		//Fourth Row
		// add 0, +/-, ., +, and =
		jplButtons.add(jbnButtons[0]);
		jplButtons.add(jbnButtons[10]);
		jplButtons.add(jbnButtons[11]);
		jplButtons.add(jbnButtons[16]);
		jplButtons.add(jbnButtons[12]);
		
		jplMaster.setLayout(new BorderLayout());
		jplMaster.add(jplBackSpace, BorderLayout.WEST);
		jplMaster.add(jplControl, BorderLayout.EAST);
		jplMaster.add(jplButtons, BorderLayout.SOUTH);

		// Add components to frame
		getContentPane().add(jplMaster, BorderLayout.SOUTH);
		requestFocus();
		
		//activate ActionListener
		for (int i=0; i<jbnButtons.length; i++){
			jbnButtons[i].addActionListener(this);
		}
		
		jmenuitemAbout.addActionListener(this);
		jmenuitemExit.addActionListener(this);

		clearAll();

		//add WindowListener for closing frame and ending program
		addWindowListener(new WindowAdapter() {

				public void windowClosed(WindowEvent e)
				{
					System.exit(0);
				}
			}
		);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}	//End of Contructor Calculator

	// Perform action
	public void actionPerformed(ActionEvent e){
		double result = 0;
	   
		if(e.getSource() == jmenuitemAbout){
			JDialog dlgAbout = new CustomABOUTDialog(this, "About Java Swing Calculator", true);
			dlgAbout.setVisible(true);
		}else if(e.getSource() == jmenuitemExit){
			System.exit(0);
		}	

		// Search for the button pressed until end of array or key found
		for (int i=0; i<jbnButtons.length; i++)
		{
			if(e.getSource() == jbnButtons[i])
			{
				switch(i)
				{
					case 0:
						addDigitToDisplay(i);
						break;

					case 1:
						addDigitToDisplay(i);
						break;

					case 2:
						addDigitToDisplay(i);
						break;

					case 3:
						addDigitToDisplay(i);
						break;

					case 4:
						addDigitToDisplay(i);
						break;

					case 5:
						addDigitToDisplay(i);
						break;

					case 6:
						addDigitToDisplay(i);
						break;

					case 7:
						addDigitToDisplay(i);
						break;

					case 8:
						addDigitToDisplay(i);
						break;

					case 9:
						addDigitToDisplay(i);
						break;

					case 10:	// +/-
						processSignChange();
						break;

					case 11:	// decimal point
						addDecimalPoint();
						break;

					case 12:	// =
						processEquals();
						break;

					case 13:	// divide
						processOperator("/");
						break;

					case 14:	// *
						processOperator("*");
						break;

					case 15:	// -
						processOperator("-");
						break;

					case 16:	// +
						processOperator("+");
						break;

					case 17:	// sqrt
						if (displayMode != ERROR_MODE)
						{
							try
							{
								if (getDisplayString().indexOf("-") == 0)
									displayError("Invalid input for function!");

								result = Math.sqrt(getNumberInDisplay());
								displayResult(result);
							}

							catch(Exception ex)
							{
								displayError("Invalid input for function!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 18:	// 1/x
						if (displayMode != ERROR_MODE){
							try
							{
								if (getNumberInDisplay() == 0)
									displayError("Cannot divide by zero!");
	
								result = 1 / getNumberInDisplay();
								displayResult(result);
							}
							
							catch(Exception ex)	{
								displayError("Cannot divide by zero!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 19:	// %
						if (displayMode != ERROR_MODE){
							try	{
								result = getNumberInDisplay() / 100;
								displayResult(result);
							}
	
							catch(Exception ex)	{
								displayError("Invalid input for function!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 20:	// backspace
						if (displayMode != ERROR_MODE){
							setDisplayString(getDisplayString().substring(0,
										getDisplayString().length() - 1));
							
							if (getDisplayString().length() < 1)
								setDisplayString("0");
						}
						break;

					case 21:	// CE
						clearExisting();
						break;

					case 22:	// C
						clearAll();
						break;
				}
			}
		}
	}

	void setDisplayString(String s){
		jlbOutput.setText(s);
	}

	String getDisplayString (){
		return jlbOutput.getText();
	}

	void addDigitToDisplay(int digit){
		if (clearOnNextDigit)
			setDisplayString("");

		String inputString = getDisplayString();
		
		if (inputString.indexOf("0") == 0){
			inputString = inputString.substring(1);
		}

		if ((!inputString.equals("0") || digit > 0)  && inputString.length() < MAX_INPUT_LENGTH){
			setDisplayString(inputString + digit);
		}
		

		displayMode = INPUT_MODE;
		clearOnNextDigit = false;
	}

	void addDecimalPoint(){
		displayMode = INPUT_MODE;

		if (clearOnNextDigit)
			setDisplayString("");

		String inputString = getDisplayString();
	
		// If the input string already contains a decimal point, don't
		//  do anything to it.
		if (inputString.indexOf(".") < 0)
			setDisplayString(new String(inputString + "."));
	}

	void processSignChange(){
		if (displayMode == INPUT_MODE)
		{
			String input = getDisplayString();

			if (input.length() > 0 && !input.equals("0"))
			{
				if (input.indexOf("-") == 0)
					setDisplayString(input.substring(1));

				else
					setDisplayString("-" + input);
			}
			
		}

		else if (displayMode == RESULT_MODE)
		{
			double numberInDisplay = getNumberInDisplay();
		
			if (numberInDisplay != 0)
				displayResult(-numberInDisplay);
		}
	}

	void clearAll()	{
		setDisplayString("0");
		lastOperator = "0";
		lastNumber = 0;
		displayMode = INPUT_MODE;
		clearOnNextDigit = true;
	}

	void clearExisting(){
		setDisplayString("0");
		clearOnNextDigit = true;
		displayMode = INPUT_MODE;
	}

	double getNumberInDisplay()	{
		String input = jlbOutput.getText();
		return Double.parseDouble(input);
	}

	void processOperator(String op) {
		if (displayMode != ERROR_MODE)
		{
			double numberInDisplay = getNumberInDisplay();

			if (!lastOperator.equals("0"))	
			{
				try
				{
					double result = processLastOperator();
					displayResult(result);
					lastNumber = result;
				}

				catch (DivideByZeroException e)
				{
				}
			}
		
			else
			{
				lastNumber = numberInDisplay;
			}
			
			clearOnNextDigit = true;
			lastOperator = op;
		}
	}

	void processEquals(){
		double result = 0;

		if (displayMode != ERROR_MODE){
			try			
			{
				result = processLastOperator();
				displayResult(result);
			}
			
			catch (DivideByZeroException e)	{
				displayError("Cannot divide by zero!");
			}

			lastOperator = "0";
		}
	}

	double processLastOperator() throws DivideByZeroException {
		double result = 0;
		double numberInDisplay = getNumberInDisplay();

		if (lastOperator.equals("/"))
		{
			if (numberInDisplay == 0)
				throw (new DivideByZeroException());

			result = lastNumber / numberInDisplay;
		}
			
		if (lastOperator.equals("*"))
			result = lastNumber * numberInDisplay;

		if (lastOperator.equals("-"))
			result = lastNumber - numberInDisplay;

		if (lastOperator.equals("+"))
			result = lastNumber + numberInDisplay;

		return result;
	}

	void displayResult(double result){
		setDisplayString(Double.toString(result));
		lastNumber = result;
		displayMode = RESULT_MODE;
		clearOnNextDigit = true;
	}

	void displayError(String errorMessage){
		setDisplayString(errorMessage);
		lastNumber = 0;
		displayMode = ERROR_MODE;
		clearOnNextDigit = true;
	}

	public static void main(String args[]) {
		Calculator calci = new Calculator();
		Container contentPane = calci.getContentPane();
//		contentPane.setLayout(new BorderLayout());
		calci.setTitle("SW07D021 Toonii mashin");
		calci.setSize(241, 217);
		calci.pack();
		calci.setLocation(400, 250);
		calci.setVisible(true);
		calci.setResizable(false);
	}
	
}		//End of Swing Calculator Class.

class DivideByZeroException extends Exception{
	public DivideByZeroException()
	{
		super();
	}
	
	public DivideByZeroException(String s)
	{
		super(s);
	}
}

class CustomABOUTDialog extends JDialog implements ActionListener {
	JButton jbnOk;

	CustomABOUTDialog(JFrame parent, String title, boolean modal){
		super(parent, title, modal);
		setBackground(Color.black);
		
		JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));

		StringBuffer text = new StringBuffer();
		text.append("Calculator Tuhai\n\n");
		text.append("Developer:	SW07D021\n");
		text.append("Bathuyag");
		
		JTextArea jtAreaAbout = new JTextArea(5, 21);
		jtAreaAbout.setText(text.toString());
		jtAreaAbout.setFont(new Font("Times New Roman", 1, 13));
		jtAreaAbout.setEditable(false);

		p1.add(jtAreaAbout);
		p1.setBackground(Color.red);
		getContentPane().add(p1, BorderLayout.CENTER);

		JPanel p2 = new JPanel(new FlowLayout(FlowLayout.CENTER));
		jbnOk = new JButton(" OK ");
		jbnOk.addActionListener(this);

		p2.add(jbnOk);
		getContentPane().add(p2, BorderLayout.SOUTH);

		setLocation(408, 270);
		setResizable(false);

		addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e)
				{
					Window aboutDialog = e.getWindow();
					aboutDialog.dispose();
				}
			}
		);

		pack();
	}

	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource() == jbnOk)	{
			this.dispose();
		}
	}
	
}

[Khaschuluu]

Миний бодлоор Java суга хэл.

C# .NET-ээс үнэгүй гэдэг утгаараа, C++-аас платформ хамааралгүй GUI прогармчилдаг утгаараа илүү хөгжүүлэгдсэн. Сангууд нь бол үнэхээр сайн хөгжүүлэлттэй. Гэвч JVM энээ тэрээ бол ч аяаяаа. Ер нь л хэрэглээний програмчлалын хэл шүү дээ

[GansukhB]

Жаваг шууд суга нтр гэж арай болохгүй ээ. Жаваг хайрладаг, хэрэглэдэг, түүгээр "хоолоо олж иддэг" хүмүүс сонсоод гомдоно

[monhoo04]

За нэг тооны машин бичсэн ухаантай шүү сонирхоорой.

Код: Бүгдийг сонгох

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;

public class Calculator extends JFrame implements ActionListener{
	// Variables
	final int MAX_INPUT_LENGTH = 20;
	final int INPUT_MODE = 0;
	final int RESULT_MODE = 1;
	final int ERROR_MODE = 2;
	int displayMode;

	boolean clearOnNextDigit, percent;
	double lastNumber;
	String lastOperator;

	private JMenu jmenuFile, jmenuHelp;
	private JMenuItem jmenuitemExit, jmenuitemAbout;
	
	private JLabel jlbOutput;
	private JButton jbnButtons[];
	private JPanel jplMaster, jplBackSpace, jplControl;
	
	/*
	 * Font(String name, int style, int size)
      Creates a new Font from the specified name, style and point size.
	 */
	
	Font f12 = new Font("Times New Roman", 0, 12);
	Font f121 = new Font("Times New Roman", 1, 12);
	
	// Constructor 
	public Calculator() 
	{
		/* Set Up the JMenuBar.
		 * Have Provided All JMenu's with Mnemonics
		 * Have Provided some JMenuItem components with Keyboard Accelerators
		 */ 
		
		jmenuFile = new JMenu("File");
		jmenuFile.setFont(f121);
		jmenuFile.setMnemonic(KeyEvent.VK_F);
		
		jmenuitemExit = new JMenuItem("Exit");
		jmenuitemExit.setFont(f12);
		jmenuitemExit.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_X, 
													ActionEvent.CTRL_MASK));
		jmenuFile.add(jmenuitemExit);

		jmenuHelp = new JMenu("Tuhai");
		jmenuHelp.setFont(f121);
		jmenuHelp.setMnemonic(KeyEvent.VK_H);

		jmenuitemAbout = new JMenuItem("Calculator in tuhai");
		jmenuitemAbout.setFont(f12);
		jmenuHelp.add(jmenuitemAbout);
		
		JMenuBar mb = new JMenuBar();
		mb.add(jmenuFile);
		mb.add(jmenuHelp);
		setJMenuBar(mb);
		
		//Set frame layout manager

		setBackground(Color.gray);

		jplMaster = new JPanel();

		jlbOutput = new JLabel("0");
		jlbOutput.setHorizontalTextPosition(JLabel.RIGHT);
		jlbOutput.setBackground(Color.WHITE);
		jlbOutput.setOpaque(true);
		
		// Add components to frame
		getContentPane().add(jlbOutput, BorderLayout.NORTH);

		jbnButtons = new JButton[23];
//		GridLayout(int rows, int cols, int hgap, int vgap) 

		JPanel jplButtons = new JPanel();			// container for Jbuttons

		// Create numeric Jbuttons
		for (int i=0; i<=9; i++)
		{
			// set each Jbutton label to the value of index
			jbnButtons[i] = new JButton(String.valueOf(i));
		}

		// Create operator Jbuttons
		jbnButtons[10] = new JButton("+/-");
		jbnButtons[11] = new JButton(".");
		jbnButtons[12] = new JButton("=");
		jbnButtons[13] = new JButton("/");
		jbnButtons[14] = new JButton("*");
		jbnButtons[15] = new JButton("-");
		jbnButtons[16] = new JButton("+");
		jbnButtons[17] = new JButton("sqrt");
		jbnButtons[18] = new JButton("1/x");
		jbnButtons[19] = new JButton("%");
		
		jplBackSpace = new JPanel();
		jplBackSpace.setLayout(new GridLayout(1, 1, 2, 2));

		jbnButtons[20] = new JButton("Backspace");
		jplBackSpace.add(jbnButtons[20]);

		jplControl = new JPanel();
		jplControl.setLayout(new GridLayout(1, 2, 2 ,2));

		jbnButtons[21] = new JButton(" CE ");
		jbnButtons[22] = new JButton("C");

		jplControl.add(jbnButtons[21]);
		jplControl.add(jbnButtons[22]);

//		Setting all Numbered JButton's to Blue. The rest to Red
		for (int i=0; i<jbnButtons.length; i++)	{
			jbnButtons[i].setFont(f12);

			if (i<10)
				jbnButtons[i].setForeground(Color.blue);
				
			else
				jbnButtons[i].setForeground(Color.red);
		}
	
		// Set panel layout manager for a 4 by 5 grid
		jplButtons.setLayout(new GridLayout(4, 5, 2, 2));
		
		//Add buttons to keypad panel starting at top left
		// First row
		for(int i=7; i<=9; i++)		{
			jplButtons.add(jbnButtons[i]);
		}
		
		// add button / and sqrt
		jplButtons.add(jbnButtons[13]);
		jplButtons.add(jbnButtons[17]);
		
		// Second row
		for(int i=4; i<=6; i++)
		{
			jplButtons.add(jbnButtons[i]);
		}
		
		// add button * and x^2
		jplButtons.add(jbnButtons[14]);
		jplButtons.add(jbnButtons[18]);

		// Third row
		for( int i=1; i<=3; i++)
		{
			jplButtons.add(jbnButtons[i]);
		}
		
		//adds button - and %
		jplButtons.add(jbnButtons[15]);
		jplButtons.add(jbnButtons[19]);
		
		//Fourth Row
		// add 0, +/-, ., +, and =
		jplButtons.add(jbnButtons[0]);
		jplButtons.add(jbnButtons[10]);
		jplButtons.add(jbnButtons[11]);
		jplButtons.add(jbnButtons[16]);
		jplButtons.add(jbnButtons[12]);
		
		jplMaster.setLayout(new BorderLayout());
		jplMaster.add(jplBackSpace, BorderLayout.WEST);
		jplMaster.add(jplControl, BorderLayout.EAST);
		jplMaster.add(jplButtons, BorderLayout.SOUTH);

		// Add components to frame
		getContentPane().add(jplMaster, BorderLayout.SOUTH);
		requestFocus();
		
		//activate ActionListener
		for (int i=0; i<jbnButtons.length; i++){
			jbnButtons[i].addActionListener(this);
		}
		
		jmenuitemAbout.addActionListener(this);
		jmenuitemExit.addActionListener(this);

		clearAll();

		//add WindowListener for closing frame and ending program
		addWindowListener(new WindowAdapter() {

				public void windowClosed(WindowEvent e)
				{
					System.exit(0);
				}
			}
		);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}	//End of Contructor Calculator

	// Perform action
	public void actionPerformed(ActionEvent e){
		double result = 0;
	   
		if(e.getSource() == jmenuitemAbout){
			JDialog dlgAbout = new CustomABOUTDialog(this, "About Java Swing Calculator", true);
			dlgAbout.setVisible(true);
		}else if(e.getSource() == jmenuitemExit){
			System.exit(0);
		}	

		// Search for the button pressed until end of array or key found
		for (int i=0; i<jbnButtons.length; i++)
		{
			if(e.getSource() == jbnButtons[i])
			{
				switch(i)
				{
					case 0:
						addDigitToDisplay(i);
						break;

					case 1:
						addDigitToDisplay(i);
						break;

					case 2:
						addDigitToDisplay(i);
						break;

					case 3:
						addDigitToDisplay(i);
						break;

					case 4:
						addDigitToDisplay(i);
						break;

					case 5:
						addDigitToDisplay(i);
						break;

					case 6:
						addDigitToDisplay(i);
						break;

					case 7:
						addDigitToDisplay(i);
						break;

					case 8:
						addDigitToDisplay(i);
						break;

					case 9:
						addDigitToDisplay(i);
						break;

					case 10:	// +/-
						processSignChange();
						break;

					case 11:	// decimal point
						addDecimalPoint();
						break;

					case 12:	// =
						processEquals();
						break;

					case 13:	// divide
						processOperator("/");
						break;

					case 14:	// *
						processOperator("*");
						break;

					case 15:	// -
						processOperator("-");
						break;

					case 16:	// +
						processOperator("+");
						break;

					case 17:	// sqrt
						if (displayMode != ERROR_MODE)
						{
							try
							{
								if (getDisplayString().indexOf("-") == 0)
									displayError("Invalid input for function!");

								result = Math.sqrt(getNumberInDisplay());
								displayResult(result);
							}

							catch(Exception ex)
							{
								displayError("Invalid input for function!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 18:	// 1/x
						if (displayMode != ERROR_MODE){
							try
							{
								if (getNumberInDisplay() == 0)
									displayError("Cannot divide by zero!");
	
								result = 1 / getNumberInDisplay();
								displayResult(result);
							}
							
							catch(Exception ex)	{
								displayError("Cannot divide by zero!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 19:	// %
						if (displayMode != ERROR_MODE){
							try	{
								result = getNumberInDisplay() / 100;
								displayResult(result);
							}
	
							catch(Exception ex)	{
								displayError("Invalid input for function!");
								displayMode = ERROR_MODE;
							}
						}
						break;

					case 20:	// backspace
						if (displayMode != ERROR_MODE){
							setDisplayString(getDisplayString().substring(0,
										getDisplayString().length() - 1));
							
							if (getDisplayString().length() < 1)
								setDisplayString("0");
						}
						break;

					case 21:	// CE
						clearExisting();
						break;

					case 22:	// C
						clearAll();
						break;
				}
			}
		}
	}

	void setDisplayString(String s){
		jlbOutput.setText(s);
	}

	String getDisplayString (){
		return jlbOutput.getText();
	}

	void addDigitToDisplay(int digit){
		if (clearOnNextDigit)
			setDisplayString("");

		String inputString = getDisplayString();
		
		if (inputString.indexOf("0") == 0){
			inputString = inputString.substring(1);
		}

		if ((!inputString.equals("0") || digit > 0)  && inputString.length() < MAX_INPUT_LENGTH){
			setDisplayString(inputString + digit);
		}
		

		displayMode = INPUT_MODE;
		clearOnNextDigit = false;
	}

	void addDecimalPoint(){
		displayMode = INPUT_MODE;

		if (clearOnNextDigit)
			setDisplayString("");

		String inputString = getDisplayString();
	
		// If the input string already contains a decimal point, don't
		//  do anything to it.
		if (inputString.indexOf(".") < 0)
			setDisplayString(new String(inputString + "."));
	}

	void processSignChange(){
		if (displayMode == INPUT_MODE)
		{
			String input = getDisplayString();

			if (input.length() > 0 && !input.equals("0"))
			{
				if (input.indexOf("-") == 0)
					setDisplayString(input.substring(1));

				else
					setDisplayString("-" + input);
			}
			
		}

		else if (displayMode == RESULT_MODE)
		{
			double numberInDisplay = getNumberInDisplay();
		
			if (numberInDisplay != 0)
				displayResult(-numberInDisplay);
		}
	}

	void clearAll()	{
		setDisplayString("0");
		lastOperator = "0";
		lastNumber = 0;
		displayMode = INPUT_MODE;
		clearOnNextDigit = true;
	}

	void clearExisting(){
		setDisplayString("0");
		clearOnNextDigit = true;
		displayMode = INPUT_MODE;
	}

	double getNumberInDisplay()	{
		String input = jlbOutput.getText();
		return Double.parseDouble(input);
	}

	void processOperator(String op) {
		if (displayMode != ERROR_MODE)
		{
			double numberInDisplay = getNumberInDisplay();

			if (!lastOperator.equals("0"))	
			{
				try
				{
					double result = processLastOperator();
					displayResult(result);
					lastNumber = result;
				}

				catch (DivideByZeroException e)
				{
				}
			}
		
			else
			{
				lastNumber = numberInDisplay;
			}
			
			clearOnNextDigit = true;
			lastOperator = op;
		}
	}

	void processEquals(){
		double result = 0;

		if (displayMode != ERROR_MODE){
			try			
			{
				result = processLastOperator();
				displayResult(result);
			}
			
			catch (DivideByZeroException e)	{
				displayError("Cannot divide by zero!");
			}

			lastOperator = "0";
		}
	}

	double processLastOperator() throws DivideByZeroException {
		double result = 0;
		double numberInDisplay = getNumberInDisplay();

		if (lastOperator.equals("/"))
		{
			if (numberInDisplay == 0)
				throw (new DivideByZeroException());

			result = lastNumber / numberInDisplay;
		}
			
		if (lastOperator.equals("*"))
			result = lastNumber * numberInDisplay;

		if (lastOperator.equals("-"))
			result = lastNumber - numberInDisplay;

		if (lastOperator.equals("+"))
			result = lastNumber + numberInDisplay;

		return result;
	}

	void displayResult(double result){
		setDisplayString(Double.toString(result));
		lastNumber = result;
		displayMode = RESULT_MODE;
		clearOnNextDigit = true;
	}

	void displayError(String errorMessage){
		setDisplayString(errorMessage);
		lastNumber = 0;
		displayMode = ERROR_MODE;
		clearOnNextDigit = true;
	}

	public static void main(String args[]) {
		Calculator calci = new Calculator();
		Container contentPane = calci.getContentPane();
//		contentPane.setLayout(new BorderLayout());
		calci.setTitle("SW07D021 Toonii mashin");
		calci.setSize(241, 217);
		calci.pack();
		calci.setLocation(400, 250);
		calci.setVisible(true);
		calci.setResizable(false);
	}
	
}		//End of Swing Calculator Class.

class DivideByZeroException extends Exception{
	public DivideByZeroException()
	{
		super();
	}
	
	public DivideByZeroException(String s)
	{
		super(s);
	}
}

class CustomABOUTDialog extends JDialog implements ActionListener {
	JButton jbnOk;

	CustomABOUTDialog(JFrame parent, String title, boolean modal){
		super(parent, title, modal);
		setBackground(Color.black);
		
		JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));

		StringBuffer text = new StringBuffer();
		text.append("Calculator Tuhai\n\n");
		text.append("Developer:	SW07D021\n");
		text.append("Bathuyag");
		
		JTextArea jtAreaAbout = new JTextArea(5, 21);
		jtAreaAbout.setText(text.toString());
		jtAreaAbout.setFont(new Font("Times New Roman", 1, 13));
		jtAreaAbout.setEditable(false);

		p1.add(jtAreaAbout);
		p1.setBackground(Color.red);
		getContentPane().add(p1, BorderLayout.CENTER);

		JPanel p2 = new JPanel(new FlowLayout(FlowLayout.CENTER));
		jbnOk = new JButton(" OK ");
		jbnOk.addActionListener(this);

		p2.add(jbnOk);
		getContentPane().add(p2, BorderLayout.SOUTH);

		setLocation(408, 270);
		setResizable(false);

		addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e)
				{
					Window aboutDialog = e.getWindow();
					aboutDialog.dispose();
				}
			}
		);

		pack();
	}

	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource() == jbnOk)	{
			this.dispose();
		}
	}
	
}

java.awt.*; geel boloo sht eclipse ashiglah yrni demii shuu anh surch bgaa humuust

[monhoo04]

Хүмүүсээ Java хэлний талаар мэддэг чаддаг бүхнээ ярилцая би
одоо гар утасны прогамчлал хийж сайгаа
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хийж байсан хүн байна уу Source харалций

Todorhoi bichldee J2ME ashgilaj bgaa ymuu andriod ???

[nomuka_ch]

charAt, string iin heregleeg heleed ogooch
mon angli oguulber database ees ug ugeer ni search hiigeed
mongol oguulber bolgon negtgeed gargamaar bn
yaj gargaj ireh uu yu ashiglahaa sain medehgui bn tuslaach...

[nomuka_ch]

java deer bichij bgiin
hurdan bol sain bn
humuusee tuslaarai

[monhoo04]

http://www.roseindia.net/java/beginners/charat.shtml iishee orood uzde

[midolsainaa]

Утасны pro бичвэл аль еditor нь зүгээр вэ?

[Almas]

Мэдэхгүй юм аа ер нь адилхан байлгүй дээ?
Би бол үбүнтү дээр Geany хэрэглэдэг. Бараг бүх юм аа л Geany дээр хийчихдэг дээ