Java tehtäviä syventävät vastaus2

Mureakuha

Tehtävä:

Kirjoita ohjelma, joka osaa muuntaa valuuttoja kuvan esittämällä tavalla. '-->'-nappi siirtää Valuutta 1:n edit-kontrolliin kirjoitetun valuuttamäärän Valuutta 2:n edit-kontrolliin valittuun valuuttamuotoon ja päinvastoin. Jos muunnos ei ole mahdollinen palautetaan pelkästään 0.

ValuuttaFrame.java

import java.text.*;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
 
/**
 * Ikkunaluokka.
 */
public class ValuuttaFrame extends JFrame
{
  private JRadioButton radioButton1 = new JRadioButton();
  private JRadioButton radioButton2 = new JRadioButton();
  private JRadioButton radioButton3 = new JRadioButton();
  private JRadioButton radioButton4 = new JRadioButton();
  private JRadioButton radioButton5 = new JRadioButton();
  private JRadioButton radioButton6 = new JRadioButton();
  private JTextField textField1 = new JTextField();
  private JTextField textField2 = new JTextField();
 
  /**
   * Konstruktori.
   */
  public ValuuttaFrame()
  {
    JPanel panel1 = new JPanel();
    JPanel panel2 = new JPanel();
    JPanel panel3 = new JPanel();
 
    JButton buttonToRight = new JButton();
    JButton buttonToLeft = new JButton();
 
    ButtonGroup buttonGroup1 = new ButtonGroup();
    ButtonGroup buttonGroup2 = new ButtonGroup();
 
    GridBagLayout gridBagLayout = new GridBagLayout();
 
    JPanel contentPane = ( JPanel ) getContentPane();
    contentPane.setLayout( gridBagLayout );
 
    setSize( new Dimension( 400, 300 ) );
    setTitle( "Valuuttamuunnos" );
    setDefaultCloseOperation( 3 );
 
    Border border = BorderFactory.createEtchedBorder( Color.white, new Color( 134, 134, 134 ) );
    TitledBorder titledBorder1 = new TitledBorder( border, "Valuutta 1" );
    panel1.setBorder( titledBorder1 );
    panel1.setLayout( gridBagLayout );
 
    TitledBorder titledBorder2 = new TitledBorder( border, "Valuutta 2" );
    panel2.setBorder( titledBorder2 );
    panel2.setLayout( gridBagLayout );
 
    buttonToRight.setText( "-->" );
    buttonToRight.addActionListener( new java.awt.event.ActionListener()
    {
      public void actionPerformed( ActionEvent e )
      {
        buttonToRight_actionPerformed( e );
      }
    } );
 
    buttonToLeft.setText( "<--" );
    buttonToLeft.addActionListener( new java.awt.event.ActionListener()
    {
      public void actionPerformed( ActionEvent e )
      {
        buttonToLeft_actionPerformed( e );
      }
    } );
 
    panel3.setLayout( gridBagLayout );
    radioButton1.setSelected( true );
    radioButton1.setText( "Markka" );
    radioButton2.setText( "Dollari" );
    radioButton3.setText( "Euro" );
    radioButton4.setSelected( true );
    radioButton4.setText( "Markka" );
    radioButton5.setText( "Dollari" );
    radioButton6.setText( "Euro" );
    textField1.setText( "0" );
    textField2.setText( "0" );
 
    contentPane.add( panel1, new GridBagConstraints( 0, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 50, 50 ) );
    panel1.add( radioButton1, new GridBagConstraints( 0, 1, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel1.add( radioButton2, new GridBagConstraints( 0, 2, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel1.add( radioButton3, new GridBagConstraints( 0, 3, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel1.add( textField1, new GridBagConstraints( 0, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 50, 0 ) );
    contentPane.add( panel2, new GridBagConstraints( 2, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.EAST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 50, 50 ) );
    panel2.add( radioButton4, new GridBagConstraints( 0, 1, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel2.add( radioButton5, new GridBagConstraints( 0, 2, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel2.add( radioButton6, new GridBagConstraints( 0, 3, 1, 1, 0.0, 0.0
        , GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel2.add( textField2, new GridBagConstraints( 0, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets( 0, 0, 0, 0 ), 50, 0 ) );
    contentPane.add( panel3, new GridBagConstraints( 1, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets( 0, 0, 0, 0 ), 0, 0 ) );
    panel3.add( buttonToRight, new GridBagConstraints( 0, 0, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets( 0, 5, 0, 5 ), 0, 0 ) );
    panel3.add( buttonToLeft, new GridBagConstraints( 0, 1, 1, 1, 0.0, 0.0
        , GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets( 0, 5, 0, 5 ), 0, 0 ) );
 
    buttonGroup1.add( radioButton1 );
    buttonGroup1.add( radioButton2 );
    buttonGroup1.add( radioButton3 );
    buttonGroup2.add( radioButton4 );
    buttonGroup2.add( radioButton5 );
    buttonGroup2.add( radioButton6 );
  }
 
  /**
   * Muunnos oikeaan.
   * @param e tapahtuman tarkempi kuvaus
   */
  private void buttonToRight_actionPerformed( ActionEvent e )
  {
    double x = 1;
    if ( radioButton1.isSelected() && radioButton4.isSelected() )
    {
      x = 1.0;
    }
    else if ( radioButton1.isSelected() && radioButton5.isSelected() )
    {
      x = 0.147;
    }
    else if ( radioButton1.isSelected() && radioButton6.isSelected() )
    {
      x = 0.166;
    }
    else if ( radioButton2.isSelected() && radioButton4.isSelected() )
    {
      x = 6.8;
    }
    else if ( radioButton2.isSelected() && radioButton5.isSelected() )
    {
      x = 1.0;
    }
    else if ( radioButton2.isSelected() && radioButton6.isSelected() )
    {
      x = 1.111;
    }
    else if ( radioButton3.isSelected() && radioButton4.isSelected() )
    {
      x = 6.0;
    }
    else if ( radioButton3.isSelected() && radioButton5.isSelected() )
    {
      x = 1.111;
    }
    else if ( radioButton3.isSelected() && radioButton6.isSelected() )
    {
      x = 1.0;
    }
    double d = Double.parseDouble( textField1.getText() );
    DecimalFormat muotoilu = new DecimalFormat( "0.00" ); // muotoilu
    try
    {
      Number n = muotoilu.parse( muotoilu.format( d * x ) );
      textField2.setText( n.doubleValue() + " " );
    }
    catch ( Exception exc )
    {}
  }
 
  /**
   * Muunnos vasempaan.
   * @param e tapahtuman tarkempi kuvaus
   */
  private void buttonToLeft_actionPerformed( ActionEvent e )
  {
    double x = 1;
    if ( radioButton1.isSelected() && radioButton4.isSelected() )
    {
      x = 1.0;
    }
    else if ( radioButton1.isSelected() && radioButton5.isSelected() )
    {
      x = 6.8;
    }
    else if ( radioButton1.isSelected() && radioButton6.isSelected() )
    {
      x = 6.0;
    }
    else if ( radioButton2.isSelected() && radioButton4.isSelected() )
    {
      x = 0.147;
    }
    else if ( radioButton2.isSelected() && radioButton5.isSelected() )
    {
      x = 1.0;
    }
    else if ( radioButton2.isSelected() && radioButton6.isSelected() )
    {
      x = 0.9;
    }
    else if ( radioButton3.isSelected() && radioButton4.isSelected() )
    {
      x = 0.166;
    }
    else if ( radioButton3.isSelected() && radioButton5.isSelected() )
    {
      x = 1.111;
    }
    else if ( radioButton3.isSelected() && radioButton6.isSelected() )
    {
      x = 1.0;
    }
    double d = Double.parseDouble( textField2.getText() );
    DecimalFormat muotoilu = new DecimalFormat( "0.00" ); // muotoilu
    try
    {
      Number n = muotoilu.parse( muotoilu.format( d * x ) );
      textField1.setText( n.doubleValue() + " " );
    }
    catch ( Exception exc )
    {}
  }
 
}

ValuuttaApp.java

import javax.swing.UIManager;
import java.awt.*;
 
/**
 * Varsinainen ohjelma.
 */
public class ValuuttaApp
{
 
  /**
   * Luo ja rakentaa ohjelman.
   */
  public ValuuttaApp()
  {
    ValuuttaFrame frame = new ValuuttaFrame();
    frame.pack();
 
    // keskittää ohjelman ruudun keskelle
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if ( frameSize.height > screenSize.height )
      frameSize.height = screenSize.height;
 
    if ( frameSize.width > screenSize.width )
      frameSize.width = screenSize.width;
 
    frame.setLocation( ( screenSize.width - frameSize.width ) / 2, ( screenSize.height - frameSize.height ) / 2 );
 
    // näyttää ohjelman
    frame.setVisible( true );
  }
 
  /**
   * Main-metodi.
   * @param args käynnistysparametrit
   */
  public static void main( String[] args )
  {
    try
    {
      UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
    }
    catch ( Exception e )
    {
      e.printStackTrace();
    }
    new ValuuttaApp();
  }
}

_{Alkuperäinen (c) Petteri Hämäläinen}