C-latest

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package GUI;

/**
 *
 * @author
 */
public class CalculatorGUI extends javax.swing.JFrame {

    public double firstDouble; // the first value is stored here
    public double secondDouble; // the second value is stored here
    public double answer = 0; // self-explanatory, spiteful comment
    boolean operatorIsSelected = false; // used to know if a value is firstDouble or secondDouble
    String operators = ""; // used to denote operator to be used in calculation
    String repeat = "";
    int i = 0;

    /**
     * Creates new form CalculatorGUI
     */
    public CalculatorGUI() {
        initComponents();
        result.setText(""); // ensures calculator screen is clear

    }

    /* The following code allows values to be set on the calculator screen and
     manipulated. */
    private void operation(String value){
        String text = result.getText();
        if (text.length() > 0 && operatorIsSelected == false) {
            result.setText(result.getText() + value);
        } else if (operatorIsSelected == true) {
            //for (int i = 0; i < 1;i++) {
                result.setText(null);
                operatorIsSelected = false;
                result.setText(result.getText() + value);
            //}
        } else {
            result.setText(value);
        }
    }

-- SAVED SPACE --

    private void oneActionPerformed(java.awt.event.ActionEvent evt) {

operation("1");
    }

    private void twoActionPerformed(java.awt.event.ActionEvent evt) {

operation("2");
    }

    private void threeActionPerformed(java.awt.event.ActionEvent evt) {

operation("3");
    }

    private void fourActionPerformed(java.awt.event.ActionEvent evt) {

operation("4");
    }

    private void fiveActionPerformed(java.awt.event.ActionEvent evt) {

operation("5");
    }

    private void sixActionPerformed(java.awt.event.ActionEvent evt) {

operation("6");
    }

    private void sevenActionPerformed(java.awt.event.ActionEvent evt) {

operation("7");
    }

    private void eightActionPerformed(java.awt.event.ActionEvent evt) {

operation("8");
    }

    private void nineActionPerformed(java.awt.event.ActionEvent evt) {

operation("9");
    }

    private void zeroActionPerformed(java.awt.event.ActionEvent evt) {

operation("0");
    }

    private void clearAllActionPerformed(java.awt.event.ActionEvent evt) {

        result.setText("");
        firstDouble = 0;
        secondDouble = 0;
        i = 0;
    }

    private void resultActionPerformed(java.awt.event.ActionEvent evt) {
// This is the calculator screen, do not edit as all the other buttons manipulate this.
    }

    private void divisionActionPerformed(java.awt.event.ActionEvent evt) {

        String numberwords = result.getText();
        firstDouble = Double.parseDouble(numberwords);
        result.setText("/");
        operatorIsSelected = true;
        operators = "/";
        repeat = "/";
    }

    private void multiplicationActionPerformed(java.awt.event.ActionEvent evt) {

        String numberwords = result.getText();
        firstDouble = Double.parseDouble(numberwords);
        result.setText("X");
        operatorIsSelected = true;
        operators = "*";
        repeat = "*";
    }

    private void additionActionPerformed(java.awt.event.ActionEvent evt) {

        String numberwords = result.getText();
        firstDouble = Double.parseDouble(numberwords);
        result.setText("+");
        operatorIsSelected = true;
        operators = "+";
        repeat = "+";
    }

    private void subtractionActionPerformed(java.awt.event.ActionEvent evt) {

        String numberwords = result.getText();
        firstDouble = Double.parseDouble(numberwords);
        result.setText("-");
        operatorIsSelected = true;
        operators = "-";
        repeat = "-";
    }

    private void equalsActionPerformed(java.awt.event.ActionEvent evt) {

        secondDouble = Double.parseDouble(result.getText());

        switch (operators) {
            case "/":
                answer = firstDouble / secondDouble;
                operators = "";
                break;
            case "*":
                answer = firstDouble * secondDouble;
                operators = "";
                break;
            case "+":
                answer = firstDouble + secondDouble;
                operators = "";
                break;
            case "-":
                answer = firstDouble - secondDouble;
                operators = "";
                break;
            default:
                if(i == 0){
       double savedValue = secondDouble;
                switch(repeat){
            case "/":
                answer = answer / savedValue;
                operators = "";
                break;
            case "*":
                answer = answer * savedValue;
                operators = "";
                break;
            case "+":
                answer = answer + savedValue;
                operators = "";
                break;
            case "-":
                answer = answer - savedValue;
                operators = "";
                break;
                }
                };
        }

        result.setText("" + answer + "");

    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;




                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(CalculatorGUI.class
                    .getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CalculatorGUI.class
                    .getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CalculatorGUI.class
                    .getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CalculatorGUI.class
                    .getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new CalculatorGUI().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton addition;
    private javax.swing.JButton clear;
    private javax.swing.JButton clearAll;
    private javax.swing.JButton decimal;
    private javax.swing.JButton division;
    private javax.swing.JButton eight;
    private javax.swing.JButton equals;
    private javax.swing.JButton five;
    private javax.swing.JButton four;
    private javax.swing.JButton multiplication;
    private javax.swing.JButton nine;
    private javax.swing.JButton one;
    private javax.swing.JFormattedTextField result;
    private javax.swing.JButton seven;
    private javax.swing.JButton six;
    private javax.swing.JButton subtraction;
    private javax.swing.JButton three;
    private javax.swing.JButton two;
    private javax.swing.JButton zero;
    // End of variables declaration
}