Question

Project: Project: Calculator

I need java code for following Problem with screenshot outputs:

Develop a Calculator that takes inputs from the user for the following operations (+, -, *, /, =,and any trignometric function such as log,sine , cos,tan etc ) as well as numbers to be computed.

Sample 1:

Enter the problem statement:

2 + 4 * 5 = 22

Click AC to restart or Exit to stop.

You must have one method for each one of those operations.

For more sample your can use the online calculator.

Answer 1

PLEASE GIVE IT A THUMBS UP

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;

class ScientificCalculator extends JFrame implements ActionListener {
static JTextField tfield, t1;
static double temp, temp1, result, a;
static double m1, m2;
int k = 1, x = 0, y = 0, z = 0;
char ch;
JButton b1, b2, b3, b4, b5, b6, b7, b8, b9, zero, clr, plus, min, div, mul, eq, dot, sin, cos, tan;
Container cont;
JPanel textPanel, buttonpanel;

static void opt(String s){
if(s.equals("add")){
double result = temp + temp1;
tfield.setText("");
tfield.setText(tfield.getText() + result);

}
if(s.equals("sub")){
double result = temp - temp1;
tfield.setText("");
tfield.setText(tfield.getText() + result);
}
if(s.equals("mul")){
double result = temp * temp1;
tfield.setText("");
tfield.setText(tfield.getText() + result);
}
if(s.equals("div")){
double result = temp / temp1;
tfield.setText("");
tfield.setText(tfield.getText() + result);
}
if(s.equals("sin")){
if (tfield.getText().equals("")) {
tfield.setText("");
} else {
a = Math.sin(Double.parseDouble(tfield.getText()));
tfield.setText("");
tfield.setText(tfield.getText() + a);
}
}
if(s.equals("cos")){
if (tfield.getText().equals("")) {
tfield.setText("");
} else {
a = Math.cos(Double.parseDouble(tfield.getText()));
tfield.setText("");
tfield.setText(tfield.getText() + a);
}
}
if(s.equals("tan")){
if (tfield.getText().equals("")) {
tfield.setText("");
} else {
a = Math.tan(Double.parseDouble(tfield.getText()));
tfield.setText("");
tfield.setText(tfield.getText() + a);
}
}
t1.setText(tfield.getText());
}

ScientificCalculator() {
cont = getContentPane();
cont.setLayout(new BorderLayout());
JPanel textpanel = new JPanel();
tfield = new JTextField(25);
t1 = new JTextField(25);
tfield.setHorizontalAlignment(SwingConstants.RIGHT);
t1.setHorizontalAlignment(SwingConstants.RIGHT);
tfield.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent keyevent) {
char c = keyevent.getKeyChar();
if (c >= '0' && c <= '9') {
} else {
keyevent.consume();
}
}
});   
textpanel.add(t1);
textpanel.add(tfield);
buttonpanel = new JPanel();
buttonpanel.setLayout(new GridLayout(8, 4, 2, 2));
boolean t = true;
tfield.setVisible(false);
b1 = new JButton("1");
buttonpanel.add(b1);
b1.addActionListener(this);
b2 = new JButton("2");
buttonpanel.add(b2);
b2.addActionListener(this);
b3 = new JButton("3");
buttonpanel.add(b3);
b3.addActionListener(this);

b4 = new JButton("4");
buttonpanel.add(b4);
b4.addActionListener(this);
b5 = new JButton("5");
buttonpanel.add(b5);
b5.addActionListener(this);
b6 = new JButton("6");
buttonpanel.add(b6);
b6.addActionListener(this);

b7 = new JButton("7");
buttonpanel.add(b7);
b7.addActionListener(this);
b8 = new JButton("8");
buttonpanel.add(b8);
b8.addActionListener(this);
b9 = new JButton("9");
buttonpanel.add(b9);
b9.addActionListener(this);

zero = new JButton("0");
buttonpanel.add(zero);
zero.addActionListener(this);

plus = new JButton("+");
buttonpanel.add(plus);
plus.addActionListener(this);

min = new JButton("-");
buttonpanel.add(min);
min.addActionListener(this);

mul = new JButton("*");
buttonpanel.add(mul);
mul.addActionListener(this);

div = new JButton("/");
div.addActionListener(this);
buttonpanel.add(div);

dot = new JButton(".");
buttonpanel.add(dot);
dot.addActionListener(this);

eq = new JButton("=");
buttonpanel.add(eq);
eq.addActionListener(this);

sin = new JButton("SIN");
buttonpanel.add(sin);
sin.addActionListener(this);
cos = new JButton("COS");
buttonpanel.add(cos);
cos.addActionListener(this);
tan = new JButton("TAN");
buttonpanel.add(tan);
tan.addActionListener(this);

clr = new JButton("AC");
buttonpanel.add(clr);
clr.addActionListener(this);
cont.add("Center", buttonpanel);
cont.add("North", textpanel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {
String s = e.getActionCommand();   
if (s.equals("1")) {
if (z == 0) {
tfield.setText(tfield.getText() + "1");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "1");   
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"1");
else
    t1.setText(tfield.getText());   
}
if (s.equals("2")) {
if (z == 0) {
tfield.setText(tfield.getText() + "2");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "2");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"2");
else
    t1.setText(tfield.getText());
}
if (s.equals("3")) {
if (z == 0) {
tfield.setText(tfield.getText() + "3");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "3");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"3");
else
    t1.setText(tfield.getText());
}
if (s.equals("4")) {
if (z == 0) {
tfield.setText(tfield.getText() + "4");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "4");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"4");
else
    t1.setText(tfield.getText());
}
if (s.equals("5")) {
if (z == 0) {
tfield.setText(tfield.getText() + "5");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "5");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"5");
else
    t1.setText(tfield.getText());
}
if (s.equals("6")) {
if (z == 0) {
tfield.setText(tfield.getText() + "6");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "6");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"6");
else
    t1.setText(tfield.getText());
}
if (s.equals("7")) {
if (z == 0) {
tfield.setText(tfield.getText() + "7");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "7");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"7");
else
    t1.setText(tfield.getText());
}
if (s.equals("8")) {
if (z == 0) {
tfield.setText(tfield.getText() + "8");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "8");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"8");
else
    t1.setText(tfield.getText());
}
if (s.equals("9")) {
if (z == 0) {
tfield.setText(tfield.getText() + "9");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "9");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"9");
else
    t1.setText(tfield.getText());
}
if (s.equals("0")) {
if (z == 0) {
tfield.setText(tfield.getText() + "0");
} else {
tfield.setText("");
tfield.setText(tfield.getText() + "0");
z = 0;
}
if(t1.getText().contains("+") || t1.getText().contains("-") || t1.getText().contains("/") || t1.getText().contains("*"))
    t1.setText(t1.getText()+"0");
else
    t1.setText(tfield.getText());
}
if (s.equals("AC")) {
tfield.setText("");
t1.setText(tfield.getText());
x = 0;
y = 0;
z = 0;
}
if (s.equals(".")) {
if (y == 0) {
tfield.setText(tfield.getText() + ".");
y = 1;
} else {
tfield.setText(tfield.getText());
}
}
if (s.equals("+")) {
if (tfield.getText().equals("")) {
tfield.setText("");
temp = 0;
ch = '+';
} else {
temp = Double.parseDouble(tfield.getText());
t1.setText(tfield.getText()+"+");
tfield.setText("");
ch = '+';
y = 0;
x = 0;
}
tfield.requestFocus();
}
if (s.equals("-")) {
if (tfield.getText().equals("")) {
tfield.setText("");
temp = 0;
ch = '-';
} else {
    t1.setText(tfield.getText()+"-");
x = 0;
y = 0;
temp = Double.parseDouble(tfield.getText());
tfield.setText("");
ch = '-';
}
tfield.requestFocus();
}
if (s.equals("/")) {
if (tfield.getText().equals("")) {
tfield.setText("");
temp = 1;
ch = '/';
} else {
    t1.setText(tfield.getText()+"/");
x = 0;
y = 0;
temp = Double.parseDouble(tfield.getText());
ch = '/';
tfield.setText("");
}
tfield.requestFocus();
}
if (s.equals("*")) {
if (tfield.getText().equals("")) {
tfield.setText("");
temp = 1;
ch = '*';
} else {
x = 0;
t1.setText(tfield.getText()+"*");
y = 0;
temp = Double.parseDouble(tfield.getText());
ch = '*';
tfield.setText("");
}
tfield.requestFocus();
}
if (s.equals("SIN")) {
opt("sin");
}
if (s.equals("COS")) {
opt("cos");
}
if (s.equals("TAN")) {
opt("tan");
}
if (s.equals("=")) {
if (tfield.getText().equals("")) {
tfield.setText("");
} else {
temp1 = Double.parseDouble(tfield.getText());
switch (ch) {
case '+':
opt("add");
break;
case '-':
opt("sub");
break;
case '/':
opt("div");
break;
case '*':
opt("mul");
break;
}
z = 1;
}
}
tfield.requestFocus();
}
public static void main(String args[]) {
try {
UIManager
.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception e) {
}
ScientificCalculator f = new ScientificCalculator();
f.setTitle("ScientificCalculator");
f.pack();
f.setVisible(true);
}
}