ConversionAppletSourceCode

/**
*      @name:ConversionApplet source code
*      @author: JAYESH R PRAJAPATI
*      @version :%I%G
*      @description: This is the conversionApplet which
*      converts one unit to another
*/

package ConversionPkg;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import borland.jbcl.layout.*;
import borland.jbcl.control.*;

public class ConversionApplet extends Applet {
XYLayout xYLayout1 = new XYLayout();
boolean isStandalone = false;
List lstFrom = new List();
List lstTo = new List();
ButtonControl butConvert = new ButtonControl();
TextField txtResult = new TextField();
Choice chCategory = new Choice();
TextField txtNumber = new TextField();
Label lblTo = new Label();
Label lblConvertNum = new Label();
Label lblCategory = new Label();
BevelPanel bevelPanel1 = new BevelPanel();
Label lblConverter = new Label();

/* The Category Selected */
String strCategory = "";
/* The number Entered */
double iNum = 0.0;

/* Matrix to store the Date */
double arryLength[][];
double arryArea[][];
double arryVolume[][];
double arryMass[][];

StatusBar statusBar = new StatusBar();
BevelPanel bevelPanel2 = new BevelPanel();

//Construct the applet
public ConversionApplet() {
/* Create the array objects and populate it*/
arryLength = new double[10][10];
populateArryLength();

arryArea = new double[10][10];
populateArryArea();

arryVolume = new double[10][10];
populateArryVolume();

arryMass = new double[10][10];
populateArryMass();

}//constructor()

//Initialize the applet
public void init() {
try { jbInit(); } catch (Exception e) { e.printStackTrace(); }
}//init()

//Component initialization
private void jbInit() throws Exception{
    this.setBackground(new Color(192, 255, 192));
    xYLayout1.setWidth(437);
    xYLayout1.setHeight(327);
    lstFrom.setBackground(Color.white);
    lblTo.setForeground(Color.blue);
    lblTo.setFont(new Font("Dialog", 1, 14));
    lblTo.setText("TO");
    butConvert.setLabel("Convert Now");
    butConvert.setFont(new Font("Dialog", 1, 12));
    txtResult.setForeground(Color.green);
    txtResult.setBackground(Color.darkGray);
    txtResult.setEditable(false);
    butConvert.addActionListener(new ConversionApplet_butConvert_actionAdapter(this));
    txtNumber.setText("1.0");
    chCategory.addItemListener(new ConversionApplet_chCategory_itemAdapter(this));
    lblConvertNum.setFont(new Font("Dialog", 1, 12));
    lblConvertNum.setText("Convert Number:");
    lblCategory.setFont(new Font("Dialog", 1, 12));
    lblCategory.setText("Category:");
    lblConverter.setBackground(Color.lightGray);
    lblConverter.setForeground(Color.red);
    lblConverter.setFont(new Font("Dialog", 1, 13));
    lblConverter.setText("METRIC CONVERTER");
    statusBar.setBackground(Color.darkGray);
    statusBar.setFont(new Font("Dialog", 1, 12));
    statusBar.setForeground(Color.red);
    statusBar.setText("Happy Converting..");
    this.setLayout(xYLayout1);
    this.add(bevelPanel1, new XYConstraints(1, 3, 434, 294));
    bevelPanel1.add(lblTo, new XYConstraints(197, 147, 34, 30));
    bevelPanel1.add(lstFrom, new XYConstraints(42, 102, 133, 136));
    bevelPanel1.add(lstTo, new XYConstraints(244, 100, 133, 136));
    bevelPanel1.add(butConvert, new XYConstraints(43, 255, 80, 26));
    bevelPanel1.add(txtResult, new XYConstraints(136, 256, 241, 25));
    bevelPanel1.add(chCategory, new XYConstraints(42, 61, 133, 25));
    bevelPanel1.add(txtNumber, new XYConstraints(244, 61, 133, -1));
    bevelPanel1.add(lblConvertNum, new XYConstraints(244, 41, 110, 18));
    bevelPanel1.add(lblCategory, new XYConstraints(42, 41, 133, 18));
    bevelPanel1.add(bevelPanel2, new XYConstraints(3, 3, 427, 34));
    bevelPanel2.add(lblConverter, new XYConstraints(144, 9, 169, 15));
    this.add(statusBar, new XYConstraints(2, 299, 434, 23));

/*Initially populete the components with default values */
InitializeComponents();
}//jbInit()

//Get Applet information
public String getAppletInfo() {
return "Applet Information";
}//getApletInfo()

//Get parameter info
public String[][] getParameterInfo() {
return null;
}//getParameterInfo()

/**
*   Name : InitializeComponents()
*   Description: This is a function which populates the
*   choice list and the list box items when the applet is loaded
*   @param : void
*   @return : void
*/
    public void InitializeComponents(){
     chCategory.addItem("Length");
     chCategory.addItem("Temperature");
     chCategory.addItem("Area");
     chCategory.addItem("Volume");
     chCategory.addItem("Mass");
     }//InitializeComponents()

/**
*    Name : populateArryLength()
*   Description : This is a function which populates the
*   array by the initial values
*   The sequence of the elements is :
*   CM, M ,in ,ft, yd , Mile
*/
    public void populateArryLength(){
   /* First ROW */
    arryLength[0][0] = 1.0;
    arryLength[0][1] = 0.01;
    arryLength[0][2] = 0.3937008;
    arryLength[0][3] = 0.03280840;
    arryLength[0][4] = 0.01093613;
    arryLength[0][5] = 0.00000621372;
   /* Second ROW */
    arryLength[1][0] = 100.0;
    arryLength[1][1] = 1.0;
    arryLength[1][2] = 39.37008;
    arryLength[1][3] = 3.280840;
    arryLength[1][4] = 1.093613;
    arryLength[1][5] = 0.0006213712;
    /* THIRD ROW */
    arryLength[2][0] = 2.54;
    arryLength[2][1] = 0.0254;
    arryLength[2][2] = 1.0;
    arryLength[2][3] = 0.08333333;
    arryLength[2][4] = 0.02777777;
    arryLength[2][5] = 0.00001578283;
    /* FOURTH ROW */
    arryLength[3][0] = 30.48;
    arryLength[3][1] = 0.3048;
    arryLength[3][2] = 12.0;
    arryLength[3][3] = 1.0;
    arryLength[3][4] = 0.333333333;
    arryLength[3][5] = 0.0001893939;
    /* FIFTH ROW */
    arryLength[4][0] = 91.44;
    arryLength[4][1] = 0.9144;
    arryLength[4][2] = 36.0;
    arryLength[4][3] = 3.0;
    arryLength[4][4] = 1.0;
    arryLength[4][5] = 0.0005681818;
    /* SIXTH ROW */
    arryLength[5][0] = 160934.4;
    arryLength[5][1] = 1609.344;
    arryLength[5][2] = 63360;
    arryLength[5][3] = 5280.0;
    arryLength[5][4] = 1760.0;
    arryLength[5][5] = 1.0;
    }//populateArryLength()

/**
*    Name : populateArryArea()
*   Description : This is a function which populates the
*   array by the initial values
*   The sequence of the elements is :
*   CM2, M2 ,in2 ,ft2, yd2 , Mile2
*/
    public void populateArryArea(){
   /* First ROW */
    arryArea[0][0] = 1.0;
    arryArea[0][1] = 0.0004;
    arryArea[0][2] = 0.1550003;
    arryArea[0][3] = 0.001076391;
    arryArea[0][4] = 0.0001195990;
    arryArea[0][5] = 0.00000000003861022;
   /* Second ROW */
    arryArea[1][0] = 10000.0;
    arryArea[1][1] = 1.0;
    arryArea[1][2] = 1550.003;
    arryArea[1][3] = 10.76391;
    arryArea[1][4] = 1.195990;
    arryArea[1][5] = 0.0000003861022;
    /* THIRD ROW */
    arryArea[2][0] = 6.4516;
    arryArea[2][1] = 0.00064516;
    arryArea[2][2] = 1.0;
    arryArea[2][3] = 0.006944444440;
    arryArea[2][4] = 0.00077160490;
    arryArea[2][5] = 0.00000000024909770;
    /* FOURTH ROW */
    arryArea[3][0] = 929.03040;
    arryArea[3][1] = 0.092903040;
    arryArea[3][2] = 144.0;
    arryArea[3][3] = 1.0;
    arryArea[3][4] = 0.1111111110;
    arryArea[3][5] = 0.000000035870070;
    /* FIFTH ROW */
    arryArea[4][0] = 8361.2730;
    arryArea[4][1] = 0.83612730;
    arryArea[4][2] = 1296.0;
    arryArea[4][3] = 9.0;
    arryArea[4][4] = 1.0;
    arryArea[4][5] = 0.00000032283060;
    /* SIXTH ROW */
    arryArea[5][0] = 25899880000.0;
    arryArea[5][1] = 2589988.0;
    arryArea[5][2] = 4014490000.0;
    arryArea[5][3] = 27878400.0;
    arryArea[5][4] = 3097600.0;
    arryArea[5][5] = 1.0;
    }//populateArryArea()

/**
*   Name : populateArryVolume()
*   Description : This is a function which populates the
*   array by the initial values
*   The sequence of the elements is :
*   M3, CM3 , liter , in3 , ft3 , qt ,gal
*/
    public void populateArryVolume(){
   /* First ROW */
    arryVolume[0][0] = 1.0;
    arryVolume[0][1] = 1000000.0;
    arryVolume[0][2] = 1000.0;
    arryVolume[0][3] = 61023.74;
    arryVolume[0][4] = 35.31467;
    arryVolume[0][5] = 1056.688;
    arryVolume[0][6] = 264.1721;
   /* Second ROW */
    arryVolume[1][0] = 0.000001;
    arryVolume[1][1] = 1.0;
    arryVolume[1][2] = 0.001;
    arryVolume[1][3] = 0.06102374;
    arryVolume[1][4] = 0.0003531467;
    arryVolume[1][5] = 0.001056688;
    arryVolume[1][6] = 0.000264172;
    /* THIRD ROW */
    arryVolume[2][0] = 0.001;
    arryVolume[2][1] = 1000.0;
    arryVolume[2][2] = 1.0;
    arryVolume[2][3] = 61.02374;
    arryVolume[2][4] = 0.03531467;
    arryVolume[2][5] = 1.056688;
    arryVolume[2][6] = 0.2641721;

    /* FOURTH ROW */
    arryVolume[3][0] = 0.00001638706;
    arryVolume[3][1] = 16.38706;
    arryVolume[3][2] = 0.01638706;
    arryVolume[3][3] = 1.0;
    arryVolume[3][4] = 0.0005787037;
    arryVolume[3][5] = 0.01731602;
    arryVolume[3][6] = 0.004329004;

    /* FIFTH ROW */
    arryVolume[4][0] = 0.02831685;
    arryVolume[4][1] = 28316.85;
    arryVolume[4][2] = 28.31685;
    arryVolume[4][3] = 1728.0;
    arryVolume[4][4] = 1.0;
    arryVolume[4][5] = 2.992208;
    arryVolume[4][6] = 7.480520;

    /* SIXTH ROW */
    arryVolume[5][0] = 0.000946353;
    arryVolume[5][1] = 946.353;
    arryVolume[5][2] = 0.946353;
    arryVolume[5][3] = 57.75;
    arryVolume[5][4] = 0.0342014;
    arryVolume[5][5] = 1.0;
    arryVolume[5][6] = 0.25;

    /* SEVENTH ROW */
    arryVolume[6][0] = 0.003785412;
    arryVolume[6][1] = 3785.412;
    arryVolume[6][2] = 3.785412;
    arryVolume[6][3] = 231.0;
    arryVolume[6][4] = 0.1336806;
    arryVolume[6][5] = 4.0;
    arryVolume[6][6] = 1.0;
    }//populateArryVolume()

/**
*    Name : populateArryMass()
*   Description : This is a function which populates the
*   array by the initial values
*   The sequence of the elements is :
*   g,kg,oz,lb,mtric ton,ton
*/
    public void populateArryMass(){
   /* First ROW */
    arryMass[0][0] = 1.0;
    arryMass[0][1] = 0.001;
    arryMass[0][2] = 0.03527396;
    arryMass[0][3] = 0.002204623;
    arryMass[0][4] = 0.000001;
    arryMass[0][5] = 0.000001102311;
   /* Second ROW */
    arryMass[1][0] = 1000.0;
    arryMass[1][1] = 1.0;
    arryMass[1][2] = 35.27396;
    arryMass[1][3] = 2.204623;
    arryMass[1][4] = 0.001;
    arryMass[1][5] = 0.001102311;
    /* THIRD ROW */
    arryMass[2][0] = 28.34925;
    arryMass[2][1] = 0.02834952;
    arryMass[2][2] = 1.0;
    arryMass[2][3] = 0.0625;
    arryMass[2][4] = 0.0002834952;
    arryMass[2][5] = 0.00003125;
    /* FOURTH ROW */
    arryMass[3][0] = 453.5924;
    arryMass[3][1] = 0.4535924;
    arryMass[3][2] = 16.0;
    arryMass[3][3] = 1.0;
    arryMass[3][4] = 0.0004535924;
    arryMass[3][5] = 0.0005;
    /* FIFTH ROW */
    arryMass[4][0] = 1000000;
    arryMass[4][1] = 1000.0;
    arryMass[4][2] = 35273.96;
    arryMass[4][3] = 2204.623;
    arryMass[4][4] = 1.0;
    arryMass[4][5] = 1.102311;
    /* SIXTH ROW */
    arryMass[5][0] = 907184.7;
    arryMass[5][1] = 907.1847;
    arryMass[5][2] = 32000.0;
    arryMass[5][3] = 2000.0;
    arryMass[5][4] = 0.9071847;
    arryMass[5][5] = 1.0;
    }//populateArryMass()

void chCategory_itemStateChanged(ItemEvent e) {
strCategory = chCategory.getSelectedItem();
LoadListBoxes(strCategory);

}//itemStateChanged

/**
* Name : LoadListBoxes()
* Description : Loads the list boxes with appropriate data
* depending upon the categorey selected
* @param : String : the category which is selected
* @return : void
*/
   public void LoadListBoxes(String strCategory){
/* First Clear all the elements in list */
   lstFrom.removeAll();
   lstTo.removeAll();

/* LENGTH */
   if(strCategory.equalsIgnoreCase("Length")){
    lstFrom.addItem("Centimeter(cm)");
    lstFrom.addItem("Meter(m)");
    lstFrom.addItem("Inch(in)");
    lstFrom.addItem("Foot(ft)");
    lstFrom.addItem("Yard(yd)");
    lstFrom.addItem("mile(mile)");

    lstTo.addItem("Centimeter(cm)");
    lstTo.addItem("Meter(m)");
    lstTo.addItem("Inch(in)");
    lstTo.addItem("Foot(ft)");
    lstTo.addItem("Yard(yd)");
    lstTo.addItem("mile(mile)");
    }//if(Length).

/* TEMPERATURE */
   if(strCategory.equalsIgnoreCase("Temperature")){
    lstFrom.addItem("Celcius(C)");
    lstFrom.addItem("Fatherenite(F)");

    lstTo.addItem("Celcius(C)");
    lstTo.addItem("Fatherenite(F)");
   }//if("Temperature")

/* AREA */
   if(strCategory.equalsIgnoreCase("Area")){
    lstFrom.addItem("CentimeterSquare(cm2)");
    lstFrom.addItem("meterSquare(m2)");
    lstFrom.addItem("inchSquare(in2)");
    lstFrom.addItem("footSquare(ft2)");
    lstFrom.addItem("yardSquare(yd2)");
    lstFrom.addItem("mileSquare(mile2)");

    lstTo.addItem("CentimeterSquare(cm2)");
    lstTo.addItem("meterSquare(m2)");
    lstTo.addItem("inchSquare(in2)");
    lstTo.addItem("footSquare(ft2)");
    lstTo.addItem("yardSquare(yd2)");
    lstTo.addItem("mileSquare(mile2)");
   }//if("Area")

/* VOLUME */
   if(strCategory.equalsIgnoreCase("Volume")){
    lstFrom.addItem("MeterCube(m3)");
    lstFrom.addItem("CentimeterCube(cm3)");
    lstFrom.addItem("Liter(liter)");
    lstFrom.addItem("InchCube(in3)");
    lstFrom.addItem("footCube(ft3)");
    lstFrom.addItem("QT(qt)");
    lstFrom.addItem("Gallon(ga1)");

    lstTo.addItem("MeterCube(m3)");
    lstTo.addItem("CentimeterCube(cm3)");
    lstTo.addItem("Liter(liter)");
    lstTo.addItem("InchCube(in3)");
    lstTo.addItem("footCube(ft3)");
    lstTo.addItem("QT(qt)");
    lstTo.addItem("Gallon(ga1)");

}//if("Volume")

/* MASS */
   if(strCategory.equalsIgnoreCase("Mass")){
    lstFrom.addItem("Gram(g)");
    lstFrom.addItem("KiloGram(Kg)");
    lstFrom.addItem("OZ (avdp)");
    lstFrom.addItem("lb (avdp)");
    lstFrom.addItem("metric ton");
    lstFrom.addItem("Ton(ton)");

    lstTo.addItem("Gram(g)");
    lstTo.addItem("KiloGram(Kg)");
    lstTo.addItem("OZ (avdp)");
    lstTo.addItem("lb (avdp)");
    lstTo.addItem("metric ton");
    lstTo.addItem("Ton(ton)");
   }//if("Mass")

}//LoadListBoxes()

void butConvert_actionPerformed(ActionEvent e) {

/* The Selected indexes from list boxes */
   int ilstFrom = -1;
   int ilstTo = -1;
/* multiplication factor */
   double dbFactor =0.0;
   double resultNum = 0.0;

   /* Get the number to be converted */
    try{
    iNum = (new Double(txtNumber.getText())).doubleValue();
    }catch (NumberFormatException nfe){
     statusBar.setText("Please Enter A Valid Number");
     System.exit(-1);
    }//catch

    /* get the indexes of the selected list items */
    ilstFrom = lstFrom.getSelectedIndex();
    ilstTo   = lstTo.getSelectedIndex();

   /* Confirm that both the list boxes are selected */
    if(ilstFrom == -1 || ilstTo == -1){
    statusBar.setText("Please Select Both the List Items");
    System.exit(-1);
    }//if(ilstFrom == -1 || ilstTo == -1)

   /* If the category is length */
   if(strCategory.equalsIgnoreCase("Length")){
      dbFactor = arryLength[ilstFrom][ilstTo];
      resultNum = dbFactor * iNum;
      txtResult.setText("" + resultNum);
      statusBar.setText("Happy Converting...");
     }//if("Length")

   /* If the category is Temperature */
   if(strCategory.equalsIgnoreCase("Temperature")){
      if(ilstFrom == 0 && ilstTo ==0){
      resultNum = iNum;
      }
      if(ilstFrom == 0 && ilstTo == 1){
      resultNum = (iNum * 1.8) + 32 ;
      }
      if(ilstFrom == 1 && ilstTo == 0){
      resultNum = 0.55 *(iNum - 32 ) ;
      }
      if(ilstFrom == 1 && ilstTo == 1){
      resultNum = iNum ;
      }
      txtResult.setText("" + resultNum);
      statusBar.setText("Happy Converting...");
     }//if("Temperature")

   /* If the category is Area */
   if(strCategory.equalsIgnoreCase("Area")){
      dbFactor = arryArea[ilstFrom][ilstTo];
      resultNum = dbFactor * iNum;
      txtResult.setText("" + resultNum);
      statusBar.setText("Happy Converting...");
     }//if("Area")

   /* If the category is Volume */
   if(strCategory.equalsIgnoreCase("Volume")){
      dbFactor = arryVolume[ilstFrom][ilstTo];
      resultNum = dbFactor * iNum;
      txtResult.setText("" + resultNum);
      statusBar.setText("Happy Converting...");
     }//if("Volume")

   /* If the category is Mass */
   if(strCategory.equalsIgnoreCase("mass")){
      dbFactor = arryMass[ilstFrom][ilstTo];
      resultNum = dbFactor * iNum;
      txtResult.setText("" + resultNum);
      statusBar.setText("Happy Converting...");
     }//if("Volume")

}//butConvert_...

}//applet

class ConversionApplet_chCategory_itemAdapter implements java.awt.event.ItemListener{
ConversionApplet adaptee;

ConversionApplet_chCategory_itemAdapter(ConversionApplet adaptee) {
this.adaptee = adaptee;
}

public void itemStateChanged(ItemEvent e) {
adaptee.chCategory_itemStateChanged(e);
}
}//class

class ConversionApplet_butConvert_actionAdapter implements java.awt.event.ActionListener {
ConversionApplet adaptee;

ConversionApplet_butConvert_actionAdapter(ConversionApplet adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.butConvert_actionPerformed(e);
}
}//class

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