pertama buka java eclipse terlebih dahulu
setelah java eclipse terbuka pilih New -> java project
kemudian setelah itu beri nama pada project file lalu finish
setelah itu pilih file -> new -> class
dberinaman pada kolom name
keemudian deklarasikan variablenya dengan source berikut
kemudian launch program aplikasi kalkulator dengan menuliskan source berikut
kemudian tulis source code berikut untuk menentukan tampilan kalkulatorkemudian untuk menampilkan angka 0-9 dan menampilkan angka tersebut ketika di klik
kemudian berikut source untuk tombol operasi aritmatika serta sekaligus menjalankan fungsinya
kemudian tulis source berikut untuk menampilkan sama dengan "=" dan fungsinya
kemudian source untuk membuat back space (untuk menghapus satu per satu digit ) dan clear
untuk membuatnya anda bisa copy source code berikut :
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JLabel;
import java.awt.Font;
import java.awt.Color;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JButton;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class calculator extends JFrame {
// deklarasi variabel
protected static final Object JButton = null;
private JPanel contentPane;
private JTextField textField;
private Float operasi1;
private Float operasi2;
private String tanda;
private String back;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
calculator frame = new calculator();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public calculator() {
// sintax untuk pembuatan frame
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(10, 25, 450, 300);
contentPane = new JPanel();
contentPane.setBackground(new Color(0, 10, 30));
contentPane.setBorder(new EmptyBorder(5, 5, 5, 13));
setContentPane(contentPane);
//label judul untuk tulisan Moh.Eki RIyadani <<<Kalkulator>>>
JLabel EkiRiyadani = new JLabel("Moh.Eki Riyadani");
EkiRiyadani.setForeground(Color.white);
EkiRiyadani.setFont(new Font("Tempus Sans ITC", Font.BOLD, 28));
// label untuk tulisan hasil
JLabel lblHasil = new JLabel("Nilai");
lblHasil.setForeground(Color.green);
lblHasil.setFont(new Font("Arial", Font.BOLD, 13));
// display hasil dan operasi kalkulator
textField = new JTextField();
textField.setBackground(Color.red);
textField.setFont(new Font("Tempus Sans ITC", Font.BOLD, 17));
textField.setColumns(10);
// Syntax untuk menampilkan angka (0-9)
JButton satu = new JButton("1");
satu.addMouseListener(new MouseAdapter() {
@Override
// syntax untuk menjalankan aksi,jika button angka di klik maka akan tampil di layer display angka tersebut
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"1");
}
});
satu.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton dua = new JButton("2");
dua.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"2");
}
});
dua.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton tiga = new JButton("3");
tiga.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"3");
}
});
tiga.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton empat = new JButton("4");
empat.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"4");
}
});
empat.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton lima = new JButton("5");
lima.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"5");
}
});
lima.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton enam = new JButton("6");
enam.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"6");
}
});
enam.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton tujuh = new JButton("7");
tujuh.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"7");
}
});
tujuh.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton delapan = new JButton("8");
delapan.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"8");
}
});
delapan.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton sembilan = new JButton("9");
sembilan.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"9");
}
});
sembilan.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton nol = new JButton("0");
nol.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText(textField.getText()+"0");
}
});
nol.setFont(new Font("Tahoma", Font.BOLD, 11));
// syntax untuk button operasi matematika(+,_,/,* dan =) dan juga tombol backspace dan clean
JButton perkalian = new JButton("x");
perkalian.addMouseListener(new MouseAdapter() {
// syntax untuk menjalankan fungsi dari tombol yaitu operasi matematika pada kalkulator dan kemudian di tampilkan pada display
@Override
public void mouseClicked(MouseEvent arg0) {
operasi1=Float.valueOf(textField.getText());
tanda="*";
textField.setText("");
}
});
perkalian.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton pembagian = new JButton("/");
pembagian.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
operasi1=Float.valueOf(textField.getText());
tanda="/";
textField.setText("");
}
});
pembagian.setFont(new Font("Tahoma", Font.PLAIN, 11));
JButton penjumlahan = new JButton("+");
penjumlahan.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
operasi1=Float.valueOf(textField.getText());
tanda="+";
textField.setText("");
}
});
penjumlahan.setFont(new Font("Tahoma", Font.BOLD, 11));
JButton pengurangan = new JButton("-");
pengurangan.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
operasi1=Float.valueOf(textField.getText());
tanda="-";
textField.setText("");
}
});
pengurangan.setFont(new Font("Tahoma", Font.BOLD, 11));
// syntax sama dengan
JButton samadengan = new JButton("=");
samadengan.addMouseListener(new MouseAdapter() {
@Override
//syntax untuk operasi samadengan dan di tampilkan pada display kalkulator (textfield)
public void mouseClicked(MouseEvent arg0) {
operasi2=Float.valueOf(textField.getText());
if(tanda.equals("*"))
operasi1=operasi1*operasi2;
else if(tanda.equals("/"))
operasi1=operasi1/operasi2;
else if(tanda.equals("+"))
operasi1=operasi1+operasi2;
else if(tanda.equals("-"))
operasi1=operasi1-operasi2;
textField.setText(String.valueOf(operasi1));
}
});
samadengan.setFont(new Font("Tahoma", Font.BOLD, 11));
// syntax untuk backspace, menghapus angka per satu digit
JButton btnBa = new JButton(" < Hapus ");
btnBa.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
int x;
back=textField.getText();
x=back.length();
back=back.substring(0,x-1);
textField.setText(back);
}
});
btnBa.setFont(new Font("Tahoma", Font.BOLD, 9));
// syntax untuk menghapus angka yang telah di tekan secara keseluruah (clear)
JButton btnC = new JButton("C");
btnC.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
textField.setText("");
}
});
btnC.setFont(new Font("Tahoma", Font.BOLD, 10));
// syntax untuk menampilankan tulisan www.5302414015.blogspot.com
JLabel lblTmd = new JLabel("www.5302414015.blogspot.com");
lblTmd.setForeground(Color.white);
lblTmd.setFont(new Font("Simplified Arabic Fixed", Font.BOLD, 12));
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(lblHasil)
.addComponent(textField, GroupLayout.DEFAULT_SIZE, 414, Short.MAX_VALUE)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(satu)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(dua)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(tiga))
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(empat)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(lima)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(enam))
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(tujuh)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(delapan)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(sembilan))
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(nol)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(btnBa)))
.addGap(23)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(2)
.addComponent(perkalian)
.addPreferredGap(ComponentPlacement.UNRELATED)
.addComponent(pengurangan, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(penjumlahan)
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(2)
.addComponent(pembagian, GroupLayout.PREFERRED_SIZE, 39, GroupLayout.PREFERRED_SIZE))
.addComponent(btnC))
.addPreferredGap(ComponentPlacement.UNRELATED)
.addComponent(samadengan)))
.addContainerGap(169, Short.MAX_VALUE))))
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(114)
.addComponent(EkiRiyadani, GroupLayout.PREFERRED_SIZE, 191, GroupLayout.PREFERRED_SIZE)
.addContainerGap(119, Short.MAX_VALUE))
.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()
.addContainerGap(274, Short.MAX_VALUE)
.addComponent(lblTmd)
.addGap(22))
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(EkiRiyadani)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(lblHasil)
.addGap(10)
.addComponent(textField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addGap(23)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(satu)
.addComponent(dua)
.addComponent(tiga)
.addComponent(perkalian)
.addComponent(pengurangan))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(empat)
.addComponent(lima)
.addComponent(enam)
.addComponent(pembagian, GroupLayout.PREFERRED_SIZE, 23, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(tujuh)
.addComponent(delapan)
.addComponent(sembilan)
.addComponent(penjumlahan))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(nol)
.addComponent(btnBa)
.addComponent(btnC)))
.addComponent(samadengan, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(ComponentPlacement.RELATED, 13, Short.MAX_VALUE)
.addComponent(lblTmd))
);
contentPane.setLayout(gl_contentPane);
}
}
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