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  1. 06-24-2009, 10:36 PM #1
    Rose88
    Rose88 is offline Member
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    Default Basic Calculator

    my homework is to build a calculator with these conditions:
    1. to add blue and red buttons and color the panel.
    2. add a + button which calculates numbers .
    3. add = button which displaying the result.
    4. add C button which clears the result field.
    5. when u press X the window closes and write a suitable message.

    my problem was when i'm doing 1+2+3+4 it only counts 3+4 and forgets the first numbers and counts just the last two. my code is like this:

    /**
    * JFarme package
    */
    package org.eclipse.swingapp;

    import javax.swing.JPanel;
    import javax.swing.JFrame;
    import javax.swing.JTextField;
    import javax.swing.JButton;

    import java.awt.Color;
    import java.awt.GridBagLayout;
    import java.awt.GridBagConstraints;
    import java.awt.Insets;
    import java.awt.Dimension;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    public class Calculator extends JFrame implements ActionListener{

    private static final long serialVersionUID = 1L;

    private final int INPUT_MODE = 0;
    private final int RESULT_MODE = 1;
    private int displayMode;
    private boolean clearOnNextDigit=true;
    private int lastNumber,result;
    private String lastOperator; // @jve:decl-index=0:

    private JPanel jContentPane = null;

    private JButton but1 = null;

    private JButton but2 = null;

    private JButton but3 = null;

    private JButton but4 = null;

    private JButton but5 = null;

    private JButton but6 = null;

    private JButton but7 = null;

    private JButton but8 = null;

    private JButton but9 = null;

    private JButton but0 = null;

    private JButton butPlus = null;

    private JButton butEqual = null;

    private JTextField jTextField = null;

    private JButton butC = null;

    private JButton ButRed = null;

    private JButton butBlue = null;

    /**
    * This is the default constructor
    */
    public Calculator() {
    super();
    initialize();
    }

    /**
    * This method initializes this
    *
    * @return void
    */
    private void initialize() {
    this.setSize(300, 200);
    this.setContentPane(getJContentPane());
    this.setTitle("Calculator");
    }

    /**
    * This method initializes jContentPane
    *
    * @return javax.swing.JPanel
    */
    private JPanel getJContentPane() {
    if (jContentPane == null) {
    GridBagConstraints gridBagConstraints17 = new GridBagConstraints();
    gridBagConstraints17.gridx = 4;
    gridBagConstraints17.gridy = 4;
    GridBagConstraints gridBagConstraints16 = new GridBagConstraints();
    gridBagConstraints16.gridx = 4;
    gridBagConstraints16.gridy = 5;
    GridBagConstraints gridBagConstraints14 = new GridBagConstraints();
    gridBagConstraints14.gridx = 1;
    gridBagConstraints14.gridy = 5;
    GridBagConstraints gridBagConstraints13 = new GridBagConstraints();
    gridBagConstraints13.fill = GridBagConstraints.VERTICAL;
    gridBagConstraints13.gridy = 1;
    gridBagConstraints13.weightx = 1.0;
    gridBagConstraints13.insets = new Insets(0, 0, 2, 2);
    gridBagConstraints13.gridx = 4;
    GridBagConstraints gridBagConstraints11 = new GridBagConstraints();
    gridBagConstraints11.gridx = 0;
    gridBagConstraints11.gridy = 4;
    GridBagConstraints gridBagConstraints10 = new GridBagConstraints();
    gridBagConstraints10.gridx = 2;
    gridBagConstraints10.gridy = 4;
    GridBagConstraints gridBagConstraints9 = new GridBagConstraints();
    gridBagConstraints9.gridx = 1;
    gridBagConstraints9.gridy = 4;
    GridBagConstraints gridBagConstraints8 = new GridBagConstraints();
    gridBagConstraints8.gridx = 2;
    gridBagConstraints8.gridy = 3;
    GridBagConstraints gridBagConstraints7 = new GridBagConstraints();
    gridBagConstraints7.gridx = 1;
    gridBagConstraints7.gridy = 3;
    GridBagConstraints gridBagConstraints6 = new GridBagConstraints();
    gridBagConstraints6.gridx = 0;
    gridBagConstraints6.gridy = 3;
    GridBagConstraints gridBagConstraints5 = new GridBagConstraints();
    gridBagConstraints5.gridx = 2;
    gridBagConstraints5.gridy = 1;
    GridBagConstraints gridBagConstraints4 = new GridBagConstraints();
    gridBagConstraints4.gridx = 1;
    gridBagConstraints4.gridy = 1;
    GridBagConstraints gridBagConstraints3 = new GridBagConstraints();
    gridBagConstraints3.gridx = 0;
    gridBagConstraints3.gridy = 1;
    GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
    gridBagConstraints2.gridx = 2;
    gridBagConstraints2.gridy = 0;
    GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
    gridBagConstraints1.gridx = 1;
    gridBagConstraints1.gridy = 0;
    GridBagConstraints gridBagConstraints = new GridBagConstraints();
    gridBagConstraints.gridx = 0;
    gridBagConstraints.gridy = 0;
    jContentPane = new JPanel();
    jContentPane.setLayout(new GridBagLayout());
    jContentPane.add(getBut1(), gridBagConstraints);
    jContentPane.add(getBut2(), gridBagConstraints1);
    jContentPane.add(getBut3(), gridBagConstraints2);
    jContentPane.add(getBut4(), gridBagConstraints3);
    jContentPane.add(getBut5(), gridBagConstraints4);
    jContentPane.add(getBut6(), gridBagConstraints5);
    jContentPane.add(getBut7(), gridBagConstraints6);
    jContentPane.add(getBut8(), gridBagConstraints7);
    jContentPane.add(getBut9(), gridBagConstraints8);
    jContentPane.add(getBut0(), gridBagConstraints9);
    jContentPane.add(getButPlus(), gridBagConstraints10);
    jContentPane.add(getButEqual(), gridBagConstraints11);
    jContentPane.add(getJTextField(), gridBagConstraints13);
    jContentPane.add(getButC(), gridBagConstraints14);
    jContentPane.add(getButRed(), gridBagConstraints16);
    jContentPane.add(getButBlue(), gridBagConstraints17);
    this.ButRed.addActionListener(this);
    this.butBlue.addActionListener(this);
    this.butC.addActionListener(this);
    this.butPlus.addActionListener(this);
    this.butEqual.addActionListener(this);
    this.but0.addActionListener(this);
    this.but1.addActionListener(this);
    this.but2.addActionListener(this);
    this.but3.addActionListener(this);
    this.but4.addActionListener(this);
    this.but5.addActionListener(this);
    this.but6.addActionListener(this);
    this.but7.addActionListener(this);
    this.but8.addActionListener(this);
    this.but9.addActionListener(this);
    }
    return jContentPane;
    }

    /**
    * This method initializes but1
    *
    * @return javax.swing.JButton
    */
    private JButton getBut1() {
    if (but1 == null) {
    but1 = new JButton();
    but1.setText("1");
    }
    return but1;
    }

    /**
    * This method initializes but2
    *
    * @return javax.swing.JButton
    */
    private JButton getBut2() {
    if (but2 == null) {
    but2 = new JButton();
    but2.setText("2");
    }
    return but2;
    }

    /**
    * This method initializes but3
    *
    * @return javax.swing.JButton
    */
    private JButton getBut3() {
    if (but3 == null) {
    but3 = new JButton();
    but3.setText("3");
    }
    return but3;
    }

    /**
    * This method initializes but4
    *
    * @return javax.swing.JButton
    */
    private JButton getBut4() {
    if (but4 == null) {
    but4 = new JButton();
    but4.setText("4");
    }
    return but4;
    }

    /**
    * This method initializes but5
    *
    * @return javax.swing.JButton
    */
    private JButton getBut5() {
    if (but5 == null) {
    but5 = new JButton();
    but5.setText("5");
    }
    return but5;
    }

    /**
    * This method initializes but6
    *
    * @return javax.swing.JButton
    */
    private JButton getBut6() {
    if (but6 == null) {
    but6 = new JButton();
    but6.setText("6");
    }
    return but6;
    }

    /**
    * This method initializes but7
    *
    * @return javax.swing.JButton
    */
    private JButton getBut7() {
    if (but7 == null) {
    but7 = new JButton();
    but7.setText("7");
    }
    return but7;
    }

    /**
    * This method initializes but8
    *
    * @return javax.swing.JButton
    */
    private JButton getBut8() {
    if (but8 == null) {
    but8 = new JButton();
    but8.setText("8");
    }
    return but8;
    }

    /**
    * This method initializes but9
    *
    * @return javax.swing.JButton
    */
    private JButton getBut9() {
    if (but9 == null) {
    but9 = new JButton();
    but9.setText("9");
    }
    return but9;
    }

    /**
    * This method initializes but0
    *
    * @return javax.swing.JButton
    */
    private JButton getBut0() {
    if (but0 == null) {
    but0 = new JButton();
    but0.setText("0");
    }
    return but0;
    }

    /**
    * This method initializes butPlus
    *
    * @return javax.swing.JButton
    */
    private JButton getButPlus() {
    if (butPlus == null) {
    butPlus = new JButton();
    butPlus.setText("+");
    }
    return butPlus;
    }

    /**
    * This method initializes butEqual
    *
    * @return javax.swing.JButton
    */
    private JButton getButEqual() {
    if (butEqual == null) {
    butEqual = new JButton();
    butEqual.setName("");
    butEqual.setText("=");
    }
    return butEqual;
    }

    /**
    * This method initializes jTextField
    *
    * @return javax.swing.JTextField
    */
    private JTextField getJTextField() {
    if (jTextField == null) {
    jTextField = new JTextField();
    jTextField.setPreferredSize(new Dimension(80, 20));
    }
    return jTextField;
    }

    /**
    * This method initializes butC
    *
    * @return javax.swing.JButton
    */
    private JButton getButC() {
    if (butC == null) {
    butC = new JButton();
    butC.setText("C");
    }
    return butC;
    }

    /**
    * This method initializes ButRed
    *
    * @return javax.swing.JButton
    */
    private JButton getButRed() {
    if (ButRed == null) {
    ButRed = new JButton();
    ButRed.setName("");
    ButRed.setPreferredSize(new Dimension(59, 26));
    ButRed.setText("Red");
    }
    return ButRed;
    }

    /**
    * This method initializes butBlue
    *
    * @return javax.swing.JButton
    */
    private JButton getButBlue() {
    if (butBlue == null) {
    butBlue = new JButton();
    butBlue.setText("Blue");
    }
    return butBlue;
    }
    /**
    * This method clears the result field
    *
    */
    private void clearAll() {
    setDisplayString("0");
    lastOperator = "0";
    lastNumber = 0;
    displayMode =0;
    result=0;
    clearOnNextDigit = true;
    }
    /**
    *
    * @param String s
    */
    private void setDisplayString(String s){
    this.jTextField.setText(s);
    }
    /**
    *
    * @return text
    */
    private String getDisplayString (){
    return this.jTextField.getText();
    }
    /**
    *
    * @param digit
    */
    private void addDigitToDisplay(int digit){
    if (clearOnNextDigit)
    setDisplayString("");

    String inputString = getDisplayString();
    setDisplayString(inputString+ digit);
    displayMode = INPUT_MODE;
    clearOnNextDigit = false;
    }
    /**
    *
    * @return int
    */
    private int getNumberInDisplay() {
    String input = this.jTextField.getText();
    return Integer.parseInt(input);
    }
    /**
    *
    * @return result
    */
    private int equalOperation(){
    result = lastNumber + getNumberInDisplay();
    lastOperator = "0";
    return result;
    }
    /**
    * Performe Action
    */
    public void actionPerformed(ActionEvent ev) {
    // TODO Auto-generated method stub
    String arg= ev.getActionCommand();
    if (arg.equals ("Red"))
    this.jContentPane.setBackground(Color.red);
    else if (arg.equals ("Blue"))
    this.jContentPane.setBackground(Color.blue);
    else if(arg.equals("C"))
    this.clearAll();
    else if(arg.equals("+")){
    lastNumber=getNumberInDisplay();
    clearOnNextDigit = true;
    lastOperator = "+";
    }
    else if(arg.equals("=")){
    displayResult(this.equalOperation());
    }
    else{
    addDigitToDisplay(Integer.parseInt(arg));
    }

    }
    /**
    *
    * @param i
    */
    private void displayResult(int i) {
    // TODO Auto-generated method stub
    setDisplayString(Integer.toString(result));
    lastNumber = result;
    clearOnNextDigit = true;
    }
    /**
    * Main Method
    * @param args
    */

    public static void main(String[] args){
    Calculator c=new Calculator();
    c.setVisible(true);
    }


    }
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  2. 06-25-2009, 12:21 AM #2
    OrangeDog's Avatar
    OrangeDog
    OrangeDog is offline Senior Member
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    Default

    Need to make sure lastNumber gets updated with the value of result.
    Don't forget to mark threads as [SOLVED] and give reps to helpful posts.
    How To Ask Questions The Smart Way
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  3. 06-25-2009, 12:32 AM #3
    Bluefox815
    Bluefox815 is offline Member
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    Default

    I cannot even find the code that adds together all of the entered numbers. Can you add a comment line that shows where this is (maybe write it in all caps or something to make it stand out)? Also, it's recommended you post code using code tags &91;code&93; // your code here &91;/code&93; and format it using tabs. Here is an example of the resulting code.

    Java Code: 
    /**
* JFarme package
*/
package org.eclipse.swingapp;

import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;

import java.awt.Color;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Calculator extends JFrame implements ActionListener{

    private static final long serialVersionUID = 1L;

    private final int INPUT_MODE = 0;
    private final int RESULT_MODE = 1;
    private int displayMode;
    private boolean clearOnNextDigit=true;
    private int lastNumber,result;
    private String lastOperator; // @jve:decl-index=0:

    private JPanel jContentPane = null;

    private JButton but1 = null;

    private JButton but2 = null;

    private JButton but3 = null;

    private JButton but4 = null;

    private JButton but5 = null;

    private JButton but6 = null;

    private JButton but7 = null;

    private JButton but8 = null;

    private JButton but9 = null;

    private JButton but0 = null;

    private JButton butPlus = null;

    private JButton butEqual = null;

    private JTextField jTextField = null;

    private JButton butC = null;

    private JButton ButRed = null;

    private JButton butBlue = null;

    /**
    * This is the default constructor
    */
    public Calculator() {
        super();
        initialize();
    }

    /**
    * This method initializes this
    *
    * @return void
    */
    private void initialize() {
        this.setSize(300, 200);
        this.setContentPane(getJContentPane());
        this.setTitle("Calculator");
    }

    /**
    * This method initializes jContentPane
    *
    * @return javax.swing.JPanel
    */
    private JPanel getJContentPane() {
        if (jContentPane == null) {
            GridBagConstraints gridBagConstraints17 = new GridBagConstraints();
            gridBagConstraints17.gridx = 4;
            gridBagConstraints17.gridy = 4;
            GridBagConstraints gridBagConstraints16 = new GridBagConstraints();
            gridBagConstraints16.gridx = 4;
            gridBagConstraints16.gridy = 5;
            GridBagConstraints gridBagConstraints14 = new GridBagConstraints();
            gridBagConstraints14.gridx = 1;
            gridBagConstraints14.gridy = 5;
            GridBagConstraints gridBagConstraints13 = new GridBagConstraints();
            gridBagConstraints13.fill = GridBagConstraints.VERTICAL;
            gridBagConstraints13.gridy = 1;
            gridBagConstraints13.weightx = 1.0;
            gridBagConstraints13.insets = new Insets(0, 0, 2, 2);
            gridBagConstraints13.gridx = 4;
            GridBagConstraints gridBagConstraints11 = new GridBagConstraints();
            gridBagConstraints11.gridx = 0;
            gridBagConstraints11.gridy = 4;
            GridBagConstraints gridBagConstraints10 = new GridBagConstraints();
            gridBagConstraints10.gridx = 2;
            gridBagConstraints10.gridy = 4;
            GridBagConstraints gridBagConstraints9 = new GridBagConstraints();
            gridBagConstraints9.gridx = 1;
            gridBagConstraints9.gridy = 4;
            GridBagConstraints gridBagConstraints8 = new GridBagConstraints();
            gridBagConstraints8.gridx = 2;
            gridBagConstraints8.gridy = 3;
            GridBagConstraints gridBagConstraints7 = new GridBagConstraints();
            gridBagConstraints7.gridx = 1;
            gridBagConstraints7.gridy = 3;
            GridBagConstraints gridBagConstraints6 = new GridBagConstraints();
            gridBagConstraints6.gridx = 0;
            gridBagConstraints6.gridy = 3;
            GridBagConstraints gridBagConstraints5 = new GridBagConstraints();
            gridBagConstraints5.gridx = 2;
            gridBagConstraints5.gridy = 1;
            GridBagConstraints gridBagConstraints4 = new GridBagConstraints();
            gridBagConstraints4.gridx = 1;
            gridBagConstraints4.gridy = 1;
            GridBagConstraints gridBagConstraints3 = new GridBagConstraints();
            gridBagConstraints3.gridx = 0;
            gridBagConstraints3.gridy = 1;
            GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
            gridBagConstraints2.gridx = 2;
            gridBagConstraints2.gridy = 0;
            GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
            gridBagConstraints1.gridx = 1;
            gridBagConstraints1.gridy = 0;
            GridBagConstraints gridBagConstraints = new GridBagConstraints();
            gridBagConstraints.gridx = 0;
            gridBagConstraints.gridy = 0;
            jContentPane = new JPanel();
            jContentPane.setLayout(new GridBagLayout());
            jContentPane.add(getBut1(), gridBagConstraints);
            jContentPane.add(getBut2(), gridBagConstraints1);
            jContentPane.add(getBut3(), gridBagConstraints2);
            jContentPane.add(getBut4(), gridBagConstraints3);
            jContentPane.add(getBut5(), gridBagConstraints4);
            jContentPane.add(getBut6(), gridBagConstraints5);
            jContentPane.add(getBut7(), gridBagConstraints6);
            jContentPane.add(getBut8(), gridBagConstraints7);
            jContentPane.add(getBut9(), gridBagConstraints8);
            jContentPane.add(getBut0(), gridBagConstraints9);
            jContentPane.add(getButPlus(), gridBagConstraints10);
            jContentPane.add(getButEqual(), gridBagConstraints11);
            jContentPane.add(getJTextField(), gridBagConstraints13);
            jContentPane.add(getButC(), gridBagConstraints14);
            jContentPane.add(getButRed(), gridBagConstraints16);
            jContentPane.add(getButBlue(), gridBagConstraints17);
            this.ButRed.addActionListener(this);
            this.butBlue.addActionListener(this);
            this.butC.addActionListener(this);
            this.butPlus.addActionListener(this);
            this.butEqual.addActionListener(this);
            this.but0.addActionListener(this);
            this.but1.addActionListener(this);
            this.but2.addActionListener(this);
            this.but3.addActionListener(this);
            this.but4.addActionListener(this);
            this.but5.addActionListener(this);
            this.but6.addActionListener(this);
            this.but7.addActionListener(this);
            this.but8.addActionListener(this);
            this.but9.addActionListener(this);
        }
        return jContentPane;
    }

    /**
    * This method initializes but1
    *
    * @return javax.swing.JButton
    */
    private JButton getBut1() {
        if (but1 == null) {
            but1 = new JButton();
            but1.setText("1");
        }
        return but1;
    }

    /**
    * This method initializes but2
    *
    * @return javax.swing.JButton
    */
    private JButton getBut2() {
        if (but2 == null) {
            but2 = new JButton();
            but2.setText("2");
        }
        return but2;
    }

    /**
    * This method initializes but3
    *
    * @return javax.swing.JButton
    */
    private JButton getBut3() {
        if (but3 == null) {
            but3 = new JButton();
            but3.setText("3");
        }
        return but3;
    }

    /**
    * This method initializes but4
    *
    * @return javax.swing.JButton
    */
    private JButton getBut4() {
        if (but4 == null) {
            but4 = new JButton();
            but4.setText("4");
        }
        return but4;
    }

    /**
    * This method initializes but5
    *
    * @return javax.swing.JButton
    */
    private JButton getBut5() {
        if (but5 == null) {
            but5 = new JButton();
            but5.setText("5");
        }
        return but5;
    }

    /**
    * This method initializes but6
    *
    * @return javax.swing.JButton
    */
    private JButton getBut6() {
        if (but6 == null) {
            but6 = new JButton();
            but6.setText("6");
        }
        return but6;
    }

    /**
    * This method initializes but7
    *
    * @return javax.swing.JButton
    */
    private JButton getBut7() {
        if (but7 == null) {
            but7 = new JButton();
            but7.setText("7");
        }
        return but7;
    }

    /**
    * This method initializes but8
    *
    * @return javax.swing.JButton
    */
    private JButton getBut8() {
        if (but8 == null) {
            but8 = new JButton();
            but8.setText("8");
        }
        return but8;
    }

    /**
    * This method initializes but9
    *
    * @return javax.swing.JButton
    */
    private JButton getBut9() {
        if (but9 == null) {
            but9 = new JButton();
            but9.setText("9");
        }
        return but9;
    }

    /**
    * This method initializes but0
    *
    * @return javax.swing.JButton
    */
    private JButton getBut0() {
        if (but0 == null) {
            but0 = new JButton();
            but0.setText("0");
        }
        return but0;
    }

    /**
    * This method initializes butPlus
    *
    * @return javax.swing.JButton
    */
    private JButton getButPlus() {
        if (butPlus == null) {
            butPlus = new JButton();
            butPlus.setText("+");
        }
        return butPlus;
    }

    /**
    * This method initializes butEqual
    *
    * @return javax.swing.JButton
    */
    private JButton getButEqual() {
        if (butEqual == null) {
            butEqual = new JButton();
            butEqual.setName("");
            butEqual.setText("=");
        }
        return butEqual;
    }

    /**
    * This method initializes jTextField
    *
    * @return javax.swing.JTextField
    */
    private JTextField getJTextField() {
        if (jTextField == null) {
            jTextField = new JTextField();
            jTextField.setPreferredSize(new Dimension(80, 20));
        }
        return jTextField;
    }

    /**
    * This method initializes butC
    *
    * @return javax.swing.JButton
    */
    private JButton getButC() {
        if (butC == null) {
            butC = new JButton();
            butC.setText("C");
        }
        return butC;
    }

    /**
    * This method initializes ButRed
    *
    * @return javax.swing.JButton
    */
    private JButton getButRed() {
        if (ButRed == null) {
            ButRed = new JButton();
            ButRed.setName("");
            ButRed.setPreferredSize(new Dimension(59, 26));
            ButRed.setText("Red");
        }
        return ButRed;
    }

    /**
    * This method initializes butBlue
    *
    * @return javax.swing.JButton
    */
    private JButton getButBlue() {
        if (butBlue == null) {
            butBlue = new JButton();
            butBlue.setText("Blue");
        }
        return butBlue;
    }
    /**
    * This method clears the result field
    *
    */
    private void clearAll() {
        setDisplayString("0");
        lastOperator = "0";
        lastNumber = 0;
        displayMode =0;
        result=0;
        clearOnNextDigit = true;
    }
    /**
    *
    * @param String s
    */
    private void setDisplayString(String s){
        this.jTextField.setText(s);
    }
    /**
    *
    * @return text
    */
    private String getDisplayString (){
        return this.jTextField.getText();
    }
    /**
    *
    * @param digit
    */
    private void addDigitToDisplay(int digit){
        if (clearOnNextDigit)
            setDisplayString("");

        String inputString = getDisplayString();
        setDisplayString(inputString+ digit);
        displayMode = INPUT_MODE;
        clearOnNextDigit = false;
    }
    /**
    *
    * @return int
    */
    private int getNumberInDisplay() {
        String input = this.jTextField.getText();
        return Integer.parseInt(input);
    }
    /**
    *
    * @return result
    */
    private int equalOperation(){
        result = lastNumber + getNumberInDisplay();
        lastOperator = "0";
        return result;
    }
    /**
    * Performe Action
    */
    public void actionPerformed(ActionEvent ev) {
        // TODO Auto-generated method stub
        String arg= ev.getActionCommand();
        if (arg.equals ("Red"))
            this.jContentPane.setBackground(Color.red);
        else if (arg.equals ("Blue"))
            this.jContentPane.setBackground(Color.blue);
        else if(arg.equals("C"))
            this.clearAll();
        else if(arg.equals("+")){
            lastNumber=getNumberInDisplay();
            clearOnNextDigit = true;
            lastOperator = "+";
        }
        else if(arg.equals("=")){
            displayResult(this.equalOperation());
        }
        else{
            addDigitToDisplay(Integer.parseInt(arg));
        }

    }
    /**
    *
    * @param i
    */
    private void displayResult(int i) {
        // TODO Auto-generated method stub
        setDisplayString(Integer.toString(result));
        lastNumber = result;
        clearOnNextDigit = true;
    }
    /**
    * Main Method
    * @param args
    */

    public static void main(String[] args){
        Calculator c=new Calculator();
        c.setVisible(true);
    }


}
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  4. 06-25-2009, 12:34 AM #4
    Bluefox815
    Bluefox815 is offline Member
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    OrangeDog found the problem :o.
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