ΑΝΑΚΟΙΝΩΣΗ
Οι εγγραφές στα εργαστήρια του μαθήματος Διαδικτυακός Προγραμματισμός 
θα γίνουν την Τρίτη 8/11/2011 και ώρα 12.00 στην αίθουσα 205.
Ο διδάσκων
Δρ Πετρανωνάκης Παύλος



//===========================================
import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
public class grafika1 extends JFrame {
/**
* Creates a new instance of <code>grafika1</code>.
*/
/**
* @param args the command line arguments
*/
public static void main(String[ ] args)
 {
	grafika1 form =new grafika1();
	form.setBounds(200,150,350,400);
	form.setTitle("LESSON 1 JAVA");
	form.setDefaultCloseOperation(EXIT_ON_CLOSE);
	form.show();
	// TODO code application logic here
}

//===========================================

/**
* @(#)grafika2.java
*
*
* @author
* @version 1.00 2011/10/26
*/
import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
public class grafika2 extends JFrame implements ActionListener
 {
// TODO code application logic here
	JPanel obj=new JPanel();
	GridLayout grid= new GridLayout(5,3);
	JLabel lbl1=new JLabel("Number 1");
	JTextField text1=new JTextField(10);
	JLabel lbl02 = new JLabel(" ");
	JLabel lbl2 = new JLabel("Number 2");
	JTextField text2=new JTextField(10);
	JLabel lbl03 = new JLabel(" ");
	JLabel lbl01 = new JLabel(" ");
	JButton b1= new JButton("add");
	JLabel lbl04 = new JLabel(" ");
	JLabel lbl4 = new JLabel("Result");
	JTextField text3=new JTextField(10);
	JLabel lbl05 = new JLabel(" ");
	public grafika2()
	{
		obj.setLayout(grid);
		obj.add(lbl1);
		obj.add(text1);
		obj.add(lbl02);
		obj.add(lbl2);
		obj.add(text2);
		obj.add(lbl03);
		obj.add(lbl01);
		b1.addActionListener(this);
		obj.add(b1);
		obj.add(lbl04);
		obj.add(lbl4);
		obj.add(text3);
		obj.add(lbl05);
		setContentPane(obj);}
		public void actionPerformed(ActionEvent e)
		{
			if(e.getSource()==b1)
			{
				int sum=Integer.parseInt(text1.getText())+Integer.parseInt(text2.getText());
				text3.setText(String.valueOf(sum));
			}
	}
	public static void main(String[] args) 
	{
		grafika2 form= new grafika2();
		form.setBounds(200,150,350,400);
		form.setTitle("LESSON 2");
		form.setDefaultCloseOperation(EXIT_ON_CLOSE);
		form.show();
	}
}

//====================================================================

/**
* @(#)grafika3.java
*
*
* @author
* @version 1.00 2011/10/27
*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
public class grafika3 extends JFrame implements ActionListener
 {
	JButton north,west,east,south,center;
	JTextField text1,text2;
	public grafika3()
	 {
		JPanel bpanel=new JPanel();
		JPanel inpanel =new JPanel();
		center= new JButton("center+");
		west= new JButton("west-");
		east= new JButton("east*");
		south= new JButton("south/");
		north= new JButton("north%");
		text1=new JTextField(10);
		text2=new JTextField(10);
		bpanel.setLayout(new BorderLayout());
		inpanel.setLayout(new FlowLayout());
		bpanel.add(north,"North");
		bpanel.add(south,"South");
		bpanel.add(east,"East");
		bpanel.add(west,"West");
		bpanel.add(inpanel,"Center");
		inpanel.add(text1);
		inpanel.add(text2);
		inpanel.add(center);
		center.addActionListener(this);
		south.addActionListener(this);
		east.addActionListener(this);
		west.addActionListener(this);
		north.addActionListener(this);
		setContentPane(bpanel);
	}
	public void actionPerformed(ActionEvent evt)
	{
		String sum="";
		int sum1;
		if(evt.getSource()==center)
		{
			sum1=Integer.parseInt(text1.getText())+Integer.parseInt(text2.getText());
			sum=String.valueOf(sum1);
			JOptionPane.showMessageDialog(null,sum,"RESULT",JOptionPane.INFORMATION_MESSAGE);
		}
		if(evt.getSource()==north)
		{
			sum1=Integer.parseInt(text1.getText())%Integer.parseInt(text2.getText());
			sum=String.valueOf(sum1);
			JOptionPane.showMessageDialog(null,sum,"RESULT",JOptionPane.INFORMATION_MESSAGE);
		}
		if(evt.getSource()==east)
		{
			sum1=Integer.parseInt(text1.getText())*Integer.parseInt(text2.getText());
			sum=String.valueOf(sum1);
			JOptionPane.showMessageDialog(null,sum,"RESULT",JOptionPane.INFORMATION_MESSAGE);
		}
		if(evt.getSource()==west)
		{
			sum1=Integer.parseInt(text1.getText())-Integer.parseInt(text2.getText());
			sum=String.valueOf(sum1);
			JOptionPane.showMessageDialog(null,sum,"RESULT",JOptionPane.INFORMATION_MESSAGE);
		}
		if(evt.getSource()==south)
		{
			try
			{
				sum1=Integer.parseInt(text1.getText())/Integer.parseInt(text2.getText());
				sum=String.valueOf(sum1);
				JOptionPane.showMessageDialog(null,sum,"RESULT",JOptionPane.INFORMATION_MESSAGE);
			}
			catch(ArithmeticException e)
			{
			JOptionPane.showMessageDialog(null,"DIVISION BY ZERO","RESULT",JOptionPane.WARNING_MESSAGE);
			}
		}
	}
	public static void main(String[] args) 
	{
		grafika3 form=new grafika3();
		form.setTitle("LESSON3");
		form.setDefaultCloseOperation(EXIT_ON_CLOSE);
		form.setBounds(300,300,350,270);
		form.show();
	}
}