Kalkulator Sederhana dengan Java

Assalamualaikum Wr, Wb.

Jumpa lagi bersama saya, oke guys, kali ini saya akan berbagi tutorial tentang cara membuat kalkulator dengan bahasa pemrograman java . langsung saja ya guys, berikut langkah - langkahnya :

1. Membuka software eclipse pada PC masing-masing

 2. Pilih dan klik file - new - java project

3. Ketik project name sesuai dengan yang anda inginkan, saya pilih dengan nama "kalkulatorsederhana"

4. Selanjutnya pilih new - class, name isikan dengan nama "calculatorUI"

5. Selanjutnya ketikan source code seperti dibawah ini

package kalkulatorsederhana;

      import java.awt.FlowLayout;

      import java.awt.event.ActionEvent;

      import java.awt.event.ActionListener;

      import javax.swing.JButton;

      import javax.swing.JFrame;

      import javax.swing.JPanel;

      import javax.swing.JTextArea;

      public class calculatorUI implements ActionListener {

            JFrame frame = new JFrame("Calcalutor");

            JPanel panel = new JPanel(new FlowLayout());

            JTextArea text = new JTextArea(2, 17);

            // button number

            JButton button1 = new JButton("1");

            JButton button2 = new JButton("2");

            JButton button3 = new JButton("3");

            JButton button4 = new JButton("4");

            JButton button5 = new JButton("5");

            JButton button6 = new JButton("6");

            JButton button7 = new JButton("7");

            JButton button8 = new JButton("8");

            JButton button9 = new JButton("9");

            JButton button0 = new JButton("0");

            // button operations

            JButton buttonAdd = new JButton("+");

            JButton buttonSub = new JButton("-");

            JButton buttonMultiply = new JButton("*");

            JButton buttonDivide = new JButton("/");

            JButton buttonEqual = new JButton("=");

            JButton buttonClear = new JButton("C");

            int number1, number2, result;

            int addc = 0, subc = 0, multic = 0, divc = 0;

            public void UI() {

                  frame.setVisible(true);

                  frame.setBounds(300, 300, 220, 300);

                  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                  frame.add(panel);

                  panel.add(text);

                  panel.add(button7);

                  panel.add(button8);

                  panel.add(button9);

                  panel.add(buttonMultiply);

                  panel.add(button4);

                  panel.add(button5);

                  panel.add(button6);

                  panel.add(buttonSub);

                  panel.add(button1);

                  panel.add(button2);

                  panel.add(button3);

                  panel.add(buttonAdd);

                  panel.add(buttonClear);

                  panel.add(button0);

                  panel.add(buttonDivide);

                  panel.add(buttonEqual);

                  // action button

                  button1.addActionListener(this);

                  button2.addActionListener(this);

                  button3.addActionListener(this);

                  button4.addActionListener(this);

                  button5.addActionListener(this);

                  button6.addActionListener(this);

                  button7.addActionListener(this);

                  button8.addActionListener(this);

                  button9.addActionListener(this);

                  button0.addActionListener(this);

                  buttonAdd.addActionListener(this);

                  buttonSub.addActionListener(this);

                  buttonMultiply.addActionListener(this);

                  buttonDivide.addActionListener(this);

                  buttonEqual.addActionListener(this);

                  buttonClear.addActionListener(this);

            }

            public void actionPerformed(ActionEvent e) {

                  Object source = e.getSource();

                  if (source == buttonClear) {

                        number1 = 0;

                        number2 = 0;

                        text.setText("");

                  }

                  if (source == button1) {

                        text.append("1");

                  }

                  if (source == button2) {

                        text.append("2");

                  }

                  if (source == button3) {

                        text.append("3");

                  }

                  if (source == button4) {

                        text.append("4");

                  }

                  if (source == button5) {

                        text.append("5");

                  }

                  if (source == button6) {

                        text.append("6");

                  }

                  if (source == button7) {

                        text.append("7");

                  }

                  if (source == button8) {

                        text.append("8");

                  }

                  if (source == button9) {

                        text.append("9");

                  }

                  if (source == button0) {

                        text.append("0");

                  }

                  if (source == buttonAdd) {

                        number1 = numberReader();

                        text.setText("");

                        addc = 1;

                        subc = 0;

                        multic = 0;

                        divc = 0;

                  }

                  if (source == buttonSub) {

                        number1 = numberReader();

                        text.setText("");

                        addc = 0;

                        subc = 1;

                        multic = 0;

                        divc = 0;

                  }

                  if (source == buttonMultiply) {

                        number1 = numberReader();

                        text.setText("");

                        addc = 0;

                        subc = 0;

                        multic = 1;

                        divc = 0;

                  }

                  if (source == buttonDivide) {

                        number1 = numberReader();

                        text.setText("");

                        addc = 0;

                        subc = 0;

                        multic = 0;

                        divc = 1;

                  }

                  if (source == buttonEqual) {

                        number2 = numberReader();

                        if (addc > 0) {

                              result = number1 + number2;

                              text.setText(Double.toString(result));

                        }

                        if (subc > 0) {

                              result = number1 - number2;

                              text.setText(Double.toString(result));

                        }

                        if (multic > 0) {

                              result = number1 * number2;

                              text.setText(Double.toString(result));

                        }

                        if (divc > 0) {

                              result = number1 / number2;

                              text.setText(Double.toString(result));

                        }

                  }

            }

            public int numberReader() {

                  int number1;

                  String s;

                  s = text.getText();

                  number1 = Integer.parseInt(s);

                  return number1;

            }

      }

6. Langkah selanjutnya kita membuat class main dari kalkulator tadi, yaitu dengan nama "calculator".

Dan ketikan source code dibawah ini :

package kalkulatorsederhana;

public class calculator extends calculatorUI{

      public static void main(String[] args) {

            calculatorUI kalkulator = new calculatorUI();

           

            kalkulator.UI();

      }

}

7. Run program yang telah dibuat dan hasilnya akan tampak seperti dibawah ini :

Terimakasih, semoga bermanfaat ya guys tutorialnya.

Jumpa lagi di lain kesempatan

Wassalamu'alaikum Wr, Wb.