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Turtorial Membuat Kalkulator dengan Eclipse







1. Pertama kita buka eclipse, sebelumnya anda install dulu java jdk-Nya.
2. Buat project java file - New - Project misal kita kasih nama "Kalkulator"

3. Buat Package untuk menaruh meneu utama (main.java) misal kita buat package dengan nama calculator file - New - Package

3. Buat class utama dalam package calculator misal Main.java
file - new - class

4. Kita isikan script ini di view.java

package calculator;

import view.CalculatorView;
public class Main {

public static void main(String[] args) {
new CalculatorView().setVisible(true);
}
}
//Saras Noya

5. Buat package view untuk menaruh class CalculatorView.java . Caranya file - new - package seperti membuat package diatas.
6.  Buat class utama dalam package view misal CalculatorView.java
file - new - class seperti membuat class diatas.
7. Kita isikan script ini di CalculatorView.java

package view;

import java.text.DecimalFormat;
import model.CalculatorModel;


public class CalculatorView extends javax.swing.JFrame {

private static final long serialVersionUID = 1L;

    public CalculatorView() {
        initComponents();
    }
    CalculatorModel model = new CalculatorModel();
    String operand="";

    public void getOperand(javax.swing.JButton button){
        operand+=button.getText();
        model.setOperand(operand);
        resultLabel.setText(operand);
    }

    private void getOperator(int opt){
        model.setOperator(opt);
        operand="";
    }
    private void process(){
        DecimalFormat df = new DecimalFormat("#,###.########");
        model.process();
        operand = "";
        resultLabel.setText(df.format(model.getResult())+"");
    }


    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        resultLabel = new javax.swing.JLabel();
        jPanel2 = new javax.swing.JPanel();
        button7 = new javax.swing.JButton();
        button4 = new javax.swing.JButton();
        button1 = new javax.swing.JButton();
        buttonKoma = new javax.swing.JButton();
        button11 = new javax.swing.JButton();
        button12 = new javax.swing.JButton();
        button2 = new javax.swing.JButton();
        button3 = new javax.swing.JButton();
        button5 = new javax.swing.JButton();
        button6 = new javax.swing.JButton();
        button8 = new javax.swing.JButton();
        button9 = new javax.swing.JButton();
        jPanel3 = new javax.swing.JPanel();
        buttonBagi = new javax.swing.JButton();
        buttonKali = new javax.swing.JButton();
        buttonKurang = new javax.swing.JButton();
        buttonTambah = new javax.swing.JButton();
        buttonAC = new javax.swing.JButton();
        buttonModulus = new javax.swing.JButton();
        buttonSeper = new javax.swing.JButton();
        buttonSamaDengan = new javax.swing.JButton();


        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Kalkulator Java with Eclipse");
        
               
        jPanel1.setBackground(new java.awt.Color(150, 250, 200));

        resultLabel.setBackground(new java.awt.Color(255, 255, 200));
        resultLabel.setFont(new java.awt.Font("Microsoft Sans Serif", 0, 36));
        resultLabel.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        resultLabel.setText("0");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(resultLabel, javax.swing.GroupLayout.DEFAULT_SIZE, 268, Short.MAX_VALUE)
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(resultLabel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        jPanel2.setBackground(new java.awt.Color(150, 250, 200));

        button7.setText("7");
        button7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button7ActionPerformed(evt);
            }
        });

        button4.setText("4");
        button4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button4ActionPerformed(evt);
            }
        });

        button1.setText("1");
        button1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button1ActionPerformed(evt);
            }
        });

        buttonKoma.setText(".");
        buttonKoma.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonKomaActionPerformed(evt);
            }
        });

        button11.setText("0");
        button11.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button11ActionPerformed(evt);
            }
        });

        button12.setText("C");
        button12.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button12ActionPerformed(evt);
            }
        });

        button2.setText("2");
        button2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button2ActionPerformed(evt);
            }
        });

        button3.setText("3");
        button3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button3ActionPerformed(evt);
            }
        });

        button5.setText("5");
        button5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button5ActionPerformed(evt);
            }
        });

        button6.setText("6");
        button6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button6ActionPerformed(evt);
            }
        });

        button8.setText("8");
        button8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button8ActionPerformed(evt);
            }
        });

        button9.setText("9");
        button9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button9ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(button7, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button8, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button9, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(button4, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button5, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button6, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(button1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button2, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button3, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(buttonKoma, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button11, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(button12, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(button7, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button8, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button9, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(button4, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button5, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button6, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(button1, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button2, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button3, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(buttonKoma, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button11, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(button12, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        jPanel3.setBackground(new java.awt.Color(150, 250, 200));

        buttonBagi.setText("/");
        buttonBagi.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonBagiActionPerformed(evt);
            }
        });

        buttonKali.setText("*");
        buttonKali.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonKaliActionPerformed(evt);
            }
        });

        buttonKurang.setText("-");
        buttonKurang.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonKurangActionPerformed(evt);
            }
        });

        buttonTambah.setText("+");
        buttonTambah.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonTambahActionPerformed(evt);
            }
        });

        buttonAC.setText("AC");
        buttonAC.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonACActionPerformed(evt);
            }
        });

        buttonModulus.setText("%");
        buttonModulus.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonModulusActionPerformed(evt);
            }
        });

        buttonSeper.setText("1/x");
        buttonSeper.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonSeperActionPerformed(evt);
            }
        });

        buttonSamaDengan.setText("=");
        buttonSamaDengan.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonSamaDenganActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addComponent(buttonKurang, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addComponent(buttonSeper, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addComponent(buttonTambah, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addComponent(buttonSamaDengan, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                        .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel3Layout.createSequentialGroup()
                            .addComponent(buttonKali, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(18, 18, 18)
                            .addComponent(buttonModulus, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel3Layout.createSequentialGroup()
                            .addComponent(buttonBagi, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(18, 18, 18)
                            .addComponent(buttonAC, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addContainerGap())
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(buttonBagi, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(buttonAC, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(buttonKali, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(buttonModulus, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(buttonKurang, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(buttonSeper, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(buttonTambah, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(buttonSamaDengan, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(14, Short.MAX_VALUE))
        );


        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }

    private void button1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button1ActionPerformed
        getOperand(button1);
    }

    private void button2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button2ActionPerformed
        getOperand(button2);
    }

    private void button3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button3ActionPerformed
        getOperand(button3);
    }

    private void button4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button4ActionPerformed
        getOperand(button4);
    }

    private void button5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button5ActionPerformed
        getOperand(button5);
    }

    private void button6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button6ActionPerformed
        getOperand(button6);
    }

    private void button7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button7ActionPerformed
        getOperand(button7);
    }

    private void button8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button8ActionPerformed
        getOperand(button8);
    }

    private void button9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button9ActionPerformed
        getOperand(button9);
    }

    private void buttonTambahActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonTambahActionPerformed
        getOperator(1);
    }

    private void buttonKurangActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonKurangActionPerformed
       getOperator(2);
    }

    private void buttonKaliActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonKaliActionPerformed
        getOperator(3);
    }

    private void buttonBagiActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonBagiActionPerformed
        getOperator(4);
    }

    private void buttonModulusActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonModulusActionPerformed
        getOperator(5);
    }

    private void buttonSeperActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonSeperActionPerformed
        getOperator(6);
    }

    private void buttonSamaDenganActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonSamaDenganActionPerformed
        process();
    }

    private void button11ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button11ActionPerformed
        getOperand(button11);
    }

    private void buttonKomaActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonKomaActionPerformed
        getOperand(buttonKoma);
    }

    private void button12ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button12ActionPerformed
        if(operand.length()>1){
            operand = operand.substring(0, operand.length()-1);
            model.setOperand(operand);
            resultLabel.setText(operand);
        }else{
            operand = "";
            model.setOperand(operand);
            resultLabel.setText("0");
        }       
    }

    private void buttonACActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonACActionPerformed
        operand = "";
        model.setOperator(0);
        model.setResult(0);
        resultLabel.setText("0");
    }
    private javax.swing.JButton button1;
    private javax.swing.JButton button11;
    private javax.swing.JButton button12;
    private javax.swing.JButton button2;
    private javax.swing.JButton button3;
    private javax.swing.JButton button4;
    private javax.swing.JButton button5;
    private javax.swing.JButton button6;
    private javax.swing.JButton button7;
    private javax.swing.JButton button8;
    private javax.swing.JButton button9;
    private javax.swing.JButton buttonAC;
    private javax.swing.JButton buttonBagi;
    private javax.swing.JButton buttonKali;
    private javax.swing.JButton buttonKoma;
    private javax.swing.JButton buttonKurang;
    private javax.swing.JButton buttonModulus;
    private javax.swing.JButton buttonSamaDengan;
    private javax.swing.JButton buttonSeper;
    private javax.swing.JButton buttonTambah;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JLabel resultLabel;
}

8. Buat package model untuk menaruh class model caranya seperti cara membuat package diatas file - new - package.
9. Buat class CalculatorModel.java di package model seperti membuat class diatas
file - new - class
10. Isikan script ini di class CalculatorModel.java

package model;


public class CalculatorModel {
    int operator=0;
    double operand1=0;
    double operand2=0;
    double result=0;

    public void setOperand(String opr) {
        if(!opr.equals("")){
            if(operator==0){
                operand1=Double.valueOf(opr);
            }else{
                operand2=Double.valueOf(opr);
            }
        }
    }

    public void setOperator(int operator) {
        this.operator = operator;
    }

    public double getResult() {
        return result;
    }

    public void setResult(double hasil) {
        this.result = hasil;
    }

    public void process(){
        switch (operator){
            case 1:
                result = operand1 + operand2;
                break;
            case 2:
                result = operand1 - operand2;
                break;
            case 3:
                result = operand1 * operand2;
                break;
            case 4:
                result = operand1 / operand2;
                break;
            case 5:
                result = operand1 % operand2;
                break;
            case 6:
                result = 1/operand1;
                break;
            default: result = operand1;
        }
        operand1=result;
    }

    public void setOperand1(double operand1) {
        this.operand1 = operand1;
    }

    public void setOperand2(double operand2) {
        this.operand2 = operand2;
    }

    public void clear(){
        setOperand1(0);
        setOperand2(0);
        setResult(0);
        setOperator(0);
    }

}

10. Run program dengan cara klik tombol segitiga hijau di bagian atas
dan hasilnya ini.


Sekian turtorial cara membuat kalkulator dengan java ,,semoga bermanfaatttt :) 
www.playonkreatif.com

#Pemrograman Berorientasi Object
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