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drisden1

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GUI Java Mortgage Calculator

Ok folks,
I have submitted this before and decided to play and modify it again. I have added an exit button to it and it seems I did everything correctly. But, there's always a but, I can't see the exit button in the window when I run it. can someone please help me find out what in the world I forgot. Maybe it is to many kids and easter candu but I am at a loss. Please any help would be great!!!! Thanks in advance.


import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.swing.*;



   public class MortgageCalculator2 extends JApplet {
     JLabel label_1;
     JLabel label_2;
     JLabel label_3;
     JTextField textfield_1;
     JTextField textfield_2;
     JTextField textfield_3;
     JButton calculate;
     JLabel label_4;
     JButton start_Over;
     JLabel label_5;
     JButton exit_Exit;
     JLabel label_6;

 public static void main(String args[]) {

        JFrame f = new JFrame("Mortgage Loan Calculator");
        MortgageCalculator2 calc = new MortgageCalculator2();
        f.getContentPane().add(calc);
        calc.init();
        f.pack();
        f.setVisible(true);

 }
    public void init() {
        MortgageCalculator2Layout customLayout = new MortgageCalculator2Layout();

        Container con = getContentPane();
        con.setFont(new Font("Helvetica", Font.PLAIN, 12));
        con.setLayout(customLayout);

        label_1 = new JLabel("Loan Amount");
        con.add(label_1);

        label_2 = new JLabel("Interest Rate");
        con.add(label_2);

        label_3 = new JLabel("Term");
        con.add(label_3);

        textfield_1 = new JTextField("");
        con.add(textfield_1);

        textfield_2 = new JTextField("");
        con.add(textfield_2);

        textfield_3 = new JTextField("");
        con.add(textfield_3);

        JButton calculate = new JButton("Calculate");
        con.add(calculate);

        label_4 = new JLabel("Payment");
        con.add(label_4);

        JButton start_Over = new JButton("Start Over");
        con.add(start_Over);

        label_5 = new JLabel("$ ");
        con.add(label_5);

        JButton exit_Exit = new JButton("Exit");
            con.add(exit_Exit);

            label_6 = new JLabel("Exit");
        con.add(label_6);

        setSize(getPreferredSize());


    //Add listener to "Calculate" button
    calculate.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
    {
        // Initialize variables
        double amount = Double.parseDouble(textfield_1.getText());
        double irate = Double.parseDouble(textfield_2.getText());
        irate=irate/100;
        double term = Double.parseDouble(textfield_3.getText());

        //Equation for calculation of monthly payment
        double payment=Math.round((amount*irate/12*Math.pow(irate/12+1,term*12))/(Math.pow(irate/12+1,term*12)-1));

        label_5.setText("$ "+payment);

    }
    });
        //Add listener to "Start Over" button
        start_Over.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        textfield_1.setText("");
        textfield_2.setText("");
        textfield_3.setText("");

        label_5.setText("$");
     }
     });

        //Add listener to "Exit" button
             exit_Exit.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent h)
     {
            textfield_1.setText("");
            textfield_2.setText("");
        textfield_3.setText("");

            label_5.setText("$");
            label_6.setText("");
    }
    });

}

class MortgageCalculator2Layout implements LayoutManager {

    public MortgageCalculator2Layout() {
    }

    public void addLayoutComponent(String name, Component comp) {
    }

    public void removeLayoutComponent(Component comp) {
    }

    public Dimension preferredLayoutSize(Container parent) {
        Dimension dim = new Dimension(0, 0);

        Insets insets = parent.getInsets();
        dim.width = 539 + insets.left + insets.right;
        dim.height = 394 + insets.top + insets.bottom;

        return dim;
    }

    public Dimension minimumLayoutSize(Container parent) {
        Dimension dim = new Dimension(0, 0);
        return dim;
    }

    public void layoutContainer(Container parent) {
        Insets insets = parent.getInsets();

        Component c;
        c = parent.getComponent(0);
        if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+8,96,24);}
        c = parent.getComponent(1);
        if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+40,96,24);}
        c = parent.getComponent(2);
        if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+72,96,24);}
        c = parent.getComponent(3);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+8,112,24);}
        c = parent.getComponent(4);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+40,112,24);}
        c = parent.getComponent(5);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+72,112,24);}
        c = parent.getComponent(6);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+104,112,24);}
        c = parent.getComponent(7);
        if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+136,96,24);}
        c = parent.getComponent(8);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+192,112,24);}
        c = parent.getComponent(9);
        if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+136,72,24);}
    }

}
}
Avatar of sciuriware
sciuriware
Do not add the components to a Container, but to a JPanel, which in turn is added to the Container.

More or less independent of this, replace:

    setSize(getPreferredSize());

by:

    pack();

;JOOP!
ASKER CERTIFIED SOLUTION
Avatar of keyurkarnik
keyurkarnik
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Avatar of keyurkarnik
keyurkarnik
Though sciuri has given you good advice, thats not the issue you are facing - the issue is because you have not set the layoutContainer correctly.
Avatar of keyurkarnik
keyurkarnik
As you have already done all the code, I am pasting in the working version of the code as per my above comments

Make sure you implement the Exit action listener correctly
Avatar of keyurkarnik
keyurkarnik
package test;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;


public class MG1 extends JApplet
{
   JLabel label_1;
   JLabel label_2;
   JLabel label_3;
   JTextField textfield_1;
   JTextField textfield_2;
   JTextField textfield_3;
   JButton calculate;
   JLabel label_4;
   JButton start_Over;
   JLabel label_5;
   JButton exit_Exit;
   JLabel label_6;

   public static void main(String args[])
   {

      JFrame f = new JFrame("Mortgage Loan Calculator");
      MG1 calc = new MG1();
      f.getContentPane().add(calc);
      calc.init();
      f.pack();
      f.setVisible(true);

   }
   public void init()
   {
      MortgageCalculator2Layout customLayout = new MortgageCalculator2Layout();

      Container con = getContentPane();
      con.setFont(new Font("Helvetica", Font.PLAIN, 12));
      con.setLayout(customLayout);

      label_1 = new JLabel("Loan Amount");
      con.add(label_1);

      label_2 = new JLabel("Interest Rate");
      con.add(label_2);

      label_3 = new JLabel("Term");
      con.add(label_3);

      textfield_1 = new JTextField("");
      con.add(textfield_1);

      textfield_2 = new JTextField("");
      con.add(textfield_2);

      textfield_3 = new JTextField("");
      con.add(textfield_3);

      calculate = new JButton("Calculate");
      con.add(calculate);

      label_4 = new JLabel("Payment");
      con.add(label_4);

      start_Over = new JButton("Start Over");
      con.add(start_Over);

      label_5 = new JLabel("$ ");
      con.add(label_5);

      exit_Exit = new JButton("Exit");
      con.add(exit_Exit);

      label_6 = new JLabel("Exit");
      con.add(label_6);

      setSize(getPreferredSize());


      //Add listener to "Calculate" button
      calculate.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            // Initialize variables
            double amount = Double.parseDouble(textfield_1.getText());
            double irate = Double.parseDouble(textfield_2.getText());
            irate = irate / 100;
            double term = Double.parseDouble(textfield_3.getText());

            //Equation for calculation of monthly payment
            double payment = Math.round((amount * irate / 12 * Math.pow(irate / 12 + 1, term * 12)) / (Math.pow(irate / 12 + 1, term * 12) - 1));

            label_5.setText("$ " + payment);

         }
      });
      //Add listener to "Start Over" button
      start_Over.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            textfield_1.setText("");
            textfield_2.setText("");
            textfield_3.setText("");

            label_5.setText("$");
         }
      });

      //Add listener to "Exit" button
      exit_Exit.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            textfield_1.setText("");
            textfield_2.setText("");
            textfield_3.setText("");

            label_5.setText("$");
         }
      });

   }

   class MortgageCalculator2Layout implements LayoutManager
   {

      public MortgageCalculator2Layout()
      {
      }

      public void addLayoutComponent(String name, Component comp)
      {
      }

      public void removeLayoutComponent(Component comp)
      {
      }

      public Dimension preferredLayoutSize(Container parent)
      {
         Dimension dim = new Dimension(0, 0);

         Insets insets = parent.getInsets();
         dim.width = 539 + insets.left + insets.right;
         dim.height = 394 + insets.top + insets.bottom;

         return dim;
      }

      public Dimension minimumLayoutSize(Container parent)
      {
         Dimension dim = new Dimension(0, 0);
         return dim;
      }

      public void layoutContainer(Container parent)
      {
         Insets insets = parent.getInsets();

         Component c;
         c = parent.getComponent(0);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 8, 96, 24);
         }
         c = parent.getComponent(1);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 40, 96, 24);
         }
         c = parent.getComponent(2);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 72, 96, 24);
         }
         c = parent.getComponent(3);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 8, 112, 24);
         }
         c = parent.getComponent(4);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 40, 112, 24);
         }
         c = parent.getComponent(5);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 72, 112, 24);
         }
         c = parent.getComponent(6);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 104, 112, 24);
         }
         c = parent.getComponent(7);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 136, 96, 24);
         }
         c = parent.getComponent(8);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 192, 112, 24);
         }
         c = parent.getComponent(9);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 136, 72, 24);
         }
         c = parent.getComponent(10);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 220, 112, 24);
         }
         
         c = parent.getComponent(11);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 220, 112, 24);
         }
         
      }

   }
}
Avatar of drisden1
drisden1

ASKER

keyurkarnik,
Got it and I see what I forgot.....but here is a question. The exit button only clears the solution not exit the program. What did I forget?
Avatar of sciuriware
sciuriware
   //Add listener to "Exit" button
      exit_Exit.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            textfield_1.setText("");
            textfield_2.setText("");
            textfield_3.setText("");

            label_5.setText("$");
            System.exit(0);             //            THIS !!
         }
      });

;JOOP!
Avatar of drisden1
drisden1

ASKER

sciuriware,
Thanks for the suggestion but it does not exit the program, all it does is clear the inputs. Here is the revised code with all suggestions:


import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;


public class MortgageCalculator2 extends JApplet
{
   JLabel label_1;
   JLabel label_2;
   JLabel label_3;
   JTextField textfield_1;
   JTextField textfield_2;
   JTextField textfield_3;
   JButton calculate;
   JLabel label_4;
   JButton start_Over;
   JLabel label_5;
   JButton exit_Exit;
   JLabel label_6;

   public static void main(String args[])
   {

      JFrame f = new JFrame("Mortgage Loan Calculator");
      MG1 calc = new MG1();
      f.getContentPane().add(calc);
      calc.init();
      f.pack();
      f.setVisible(true);

   }
   public void init()
   {
      MortgageCalculator2Layout customLayout = new MortgageCalculator2Layout();

      Container con = getContentPane();
      con.setFont(new Font("Helvetica", Font.PLAIN, 12));
      con.setLayout(customLayout);

      label_1 = new JLabel("Loan Amount");
      con.add(label_1);

      label_2 = new JLabel("Interest Rate");
      con.add(label_2);

      label_3 = new JLabel("Term");
      con.add(label_3);

      textfield_1 = new JTextField("");
      con.add(textfield_1);

      textfield_2 = new JTextField("");
      con.add(textfield_2);

      textfield_3 = new JTextField("");
      con.add(textfield_3);

      calculate = new JButton("Calculate");
      con.add(calculate);

      label_4 = new JLabel("Payment");
      con.add(label_4);

      start_Over = new JButton("Start Over");
      con.add(start_Over);

      label_5 = new JLabel("$ ");
      con.add(label_5);

      exit_Exit = new JButton("Exit");
      con.add(exit_Exit);

      label_6 = new JLabel("Exit");
      con.add(label_6);

      setSize(getPreferredSize());


      //Add listener to "Calculate" button
      calculate.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            // Initialize variables
            double amount = Double.parseDouble(textfield_1.getText());
            double irate = Double.parseDouble(textfield_2.getText());
            irate = irate / 100;
            double term = Double.parseDouble(textfield_3.getText());

            //Equation for calculation of monthly payment
            double payment = Math.round((amount * irate / 12 * Math.pow(irate / 12 + 1, term * 12)) / (Math.pow(irate / 12 + 1, term * 12) - 1));

            label_5.setText("$ " + payment);

         }
      });
      //Add listener to "Start Over" button
      start_Over.addActionListener(new ActionListener()
      {
         public void actionPerformed(ActionEvent h)
         {
            textfield_1.setText("");
            textfield_2.setText("");
            textfield_3.setText("");

            label_5.setText("$");
         }
      });

      //Add listener to "Exit" button
              exit_Exit.addActionListener(new ActionListener()
              {
                 public void actionPerformed(ActionEvent h)
                 {
                    textfield_1.setText("");
                    textfield_2.setText("");
                    textfield_3.setText("");

                    label_6.setText("");
                    System.exit(6);
                 }
              });

   }

   class MortgageCalculator2Layout implements LayoutManager
   {

      public MortgageCalculator2Layout()
      {
      }

      public void addLayoutComponent(String name, Component comp)
      {
      }

      public void removeLayoutComponent(Component comp)
      {
      }

      public Dimension preferredLayoutSize(Container parent)
      {
         Dimension dim = new Dimension(0, 0);

         Insets insets = parent.getInsets();
         dim.width = 539 + insets.left + insets.right;
         dim.height = 394 + insets.top + insets.bottom;

         return dim;
      }

      public Dimension minimumLayoutSize(Container parent)
      {
         Dimension dim = new Dimension(0, 0);
         return dim;
      }

      public void layoutContainer(Container parent)
      {
         Insets insets = parent.getInsets();

         Component c;
         c = parent.getComponent(0);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 8, 96, 24);
         }
         c = parent.getComponent(1);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 40, 96, 24);
         }
         c = parent.getComponent(2);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 72, 96, 24);
         }
         c = parent.getComponent(3);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 8, 112, 24);
         }
         c = parent.getComponent(4);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 40, 112, 24);
         }
         c = parent.getComponent(5);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 72, 112, 24);
         }
         c = parent.getComponent(6);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 104, 112, 24);
         }
         c = parent.getComponent(7);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 136, 96, 24);
         }
         c = parent.getComponent(8);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 192, 112, 24);
         }
         c = parent.getComponent(9);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 136, 72, 24);
         }
         c = parent.getComponent(10);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 112, insets.top + 220, 112, 24);
         }

         c = parent.getComponent(11);
         if (c.isVisible())
         {
            c.setBounds(insets.left + 8, insets.top + 220, 112, 24);
         }

      }

   }
}
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sciuriware
Sorry, System.exit() doesn't work for an Applet.
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drisden1

ASKER

sciuriware,
So, is it possible to use an exit command in this program or do I have to change everything? I've tried a few things and nothing seems to work.
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keyurkarnik
http://forum.java.sun.com/thread.jspa?threadID=329456&messageID=2970381

Try this, or just set the visible attribute to false or something. You cannot call system.exit thats for sure