//Calculator.java
package calculator;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;




public class Calculator extends JFrame implements ActionListener{
    JButton enter, clear, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btnC, plus, minus, divide, multiplication, sine, cosine, tan, csc, sec, cot, equal, btnP;
    JTextField txt = new JTextField(15);
    Inner logic = new Inner();
    JPanel panel = new JPanel();
    String op = "";
    double total1;
    String fnum, snum;
    public Calculator(String title){
        super(title);
        this.init();
        this.setSize(225, 300);
        this.setVisible(true);

    }
    void init()
    {
        JButton ln = new JButton("ln");
        JButton sqrt = new JButton("\u221A");
        JButton rec = new JButton("1/x");
        JButton btn0 = new JButton("0");
        JButton btn1 = new JButton("1");
        JButton btn2 = new JButton("2");
        JButton btn3 = new JButton("3");
        JButton btn4 = new JButton("4");
        JButton btn5 = new JButton("5");
        JButton btn6 = new JButton("6");
        JButton btn7 = new JButton("7");
        JButton btn8 = new JButton("8");
        JButton btn9 = new JButton("9");
        JButton btnC = new JButton("C");
        JButton btnP = new JButton(".");
        JButton plus = new JButton("+");
        JButton multiplication = new JButton("*");
        JButton divide = new JButton("/");
        JButton minus = new JButton("-");
        JButton equal = new JButton("=");
        JButton sine = new JButton("sin");
        JButton cosine = new JButton("cos");
        JButton tan  = new JButton("tan");
        JButton csc  = new JButton("csc");
        JButton sec  = new JButton("sec");
        JButton cot = new JButton("cot");
        ln.addActionListener(this);
        rec.addActionListener(this);
        btn0.addActionListener(this);
        btn1.addActionListener(this);
        btn2.addActionListener(this);
        btn3.addActionListener(this);
        btn4.addActionListener(this);
        btn5.addActionListener(this);
        btn6.addActionListener(this);
        btn7.addActionListener(this);
        btn8.addActionListener(this);
        btn9.addActionListener(this);
        btnC.addActionListener(this);
        btnP.addActionListener(this);
        plus.addActionListener(this);
        minus.addActionListener(this);
        equal.addActionListener(this);
        sine.addActionListener(this);
        cosine.addActionListener(this);
        tan.addActionListener(this);
        csc.addActionListener(this);
        sec.addActionListener(this);
        cot.addActionListener(this);

        txt.setBounds(35,15,360,50);
        btn7.setBounds(35,85,50,50);
        btn8.setBounds(95,85,50,50);
        btn9.setBounds(155,85,50,50);
        btn4.setBounds(35,145,50,50);
        btn5.setBounds(95,145,50,50);
        btn6.setBounds(155,145,50,50);
        btn1.setBounds(35,205,50,50);
        btn2.setBounds(95,205,50,50);
        btn3.setBounds(155,205,50,50);
        btnC.setBounds(340,85,50,50);
        btnP.setBounds(95,265,50,50);
        plus.setBounds(280,145,50,50);
        multiplication.setBounds(340,145,50,50);
        minus.setBounds(280,205,50,50);
        divide.setBounds(340,205,50,50);
        sine.setBounds(280, 265, 110, 50);
        cosine.setBounds(340, 265, 50, 50);
        tan.setBounds(280,315, 170, 50);
        csc.setBounds(340, 325, 50, 50);
        sec.setBounds(280, 375,230, 50);
        cot.setBounds(340, 385, 50, 50);
        equal.setBounds(280,315,170,50);
        panel.add(txt);
        panel.add(btn1);
        panel.add(btn2);
        panel.add(btn3);
        panel.add(plus);
        panel.add(btn4);
        panel.add(btn5);
        panel.add(btn6);
        panel.add(minus);
        panel.add(btn7);
        panel.add(btn8);
        panel.add(btn9);
        panel.add(multiplication);
        panel.add(btnC);
        panel.add(btn0);
        panel.add(btnP);
        panel.add(divide);
        panel.add(rec);
        panel.add(sqrt);
        panel.add(ln);
        panel.add(equal);
        panel.add(sine);
        panel.add(cosine);
        panel.add(tan);
        panel.add(csc);
        panel.add(sec);
        panel.add(cot);
        this.add(panel);
        setVisible(true);
    }
    public void actionPerformed(ActionEvent ea)
    {
            String e = ea.getActionCommand();
            String input = txt.getText();
            if(e.equals("C"))
            {
                txt.setText("");
                //logic.setTotal("");
            }
            else if(e.equals("1"))
            {
                txt.setText(input + "1");
            }
            if(e.equals("2"))
            {
                txt.setText(input + "2");
            }
            if(e.equals("3"))
            {
                txt.setText(input + "3");
            }
            if(e.equals("4"))
            {
                txt.setText(input + "4");
            }
            if(e.equals("5"))
            {
                txt.setText(input + "5");
            }
            if(e.equals("6"))
            {
                txt.setText(input + "6");
            }
            if(e.equals("7"))
            {
                txt.setText(input + "7");
            }
            if(e.equals("8"))
            {
                txt.setText(input + "8");
            }
            if(e.equals("9"))
            {
                txt.setText(input + "9");
            }
            if(e.equals("."))
            {
                txt.setText(input + ".");
            }

            if(e.equals("+"))
            {
                fnum = txt.getText();
                op = "+";
                txt.setText("");
            }
            if(e.equals("-"))
            {
                fnum = txt.getText();
                op = "-";
                txt.setText("");
            }
            if(e.equals("*"))
            {
                fnum = txt.getText();
                logic.setTotal(fnum);
                op = "*";
                txt.setText("");
                JOptionPane.showMessageDialog(null, fnum);
            }
            if(e.equals("/"))
            {
                fnum = txt.getText();
                op = "/";
                txt.setText("");
            }
            if(e.equals("sin"))
            {
                fnum = txt.getText();
                op = "sin";
            }
            if(e.equals("cos"))
            {
                fnum = txt.getText();
                op = "cos";
            }
            if(e.equals("tan"))
            {
                fnum = txt.getText();
                op = "tan";
            }
            if(e.equals("csc"))
            {
                fnum = txt.getText();
                op = "csc";
            }
            if(e.equals("sec"))
            {
                fnum = txt.getText();
                op = "sec";
            }
            if(e.equals("cot"))
            {
                fnum = txt.getText();
                op = "cot";
            }
            if(e.equals("ln"))
            {
                fnum = txt.getText();
                op = "ln";
            }
            if(e.equals("1/x"))
            {
                fnum = txt.getText();
                op = "1/x";
            }
            if(e.equals("\u221A"))
            {
                fnum = txt.getText();
                op = "sqrt";
            }
            else if(e.equals("="))
            {
                  snum = txt.getText();
                  if(op.equals("+"))
                  {
                      logic.setTotal(fnum);
                      logic.add(snum);
                      total1 = logic.total;
                  }
                  else if(op.equals("*"))
                  {
                       logic.setTotal(fnum);
                       logic.multiplication(snum);
                       total1 = logic.total;
                  }
                  else if(op.equals("/")){
                      logic.setTotal(fnum);
                      logic.divide(snum);
                      total1 = logic.total;
                  }
                  else if(op.equals("-"))
                  {
                      logic.setTotal(fnum);
                      logic.substract(snum);
                      total1 = logic.total;
                  }
                  else if(op.equals("sin"))
                  {
                       logic.total = logic.convertToNumber(fnum);
                       logic.sine();
                       total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("cos"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.cosine();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("tan"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.tangent();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("csc"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.csc();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("sec"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.sec();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("cot"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.cot();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("sqrt"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.sqrt();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("ln"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.ln();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  else if(op.equals("1/x"))
                  {
                      logic.total = logic.convertToNumber(fnum);
                      logic.recipocal();
                      total1 = logic.convertToNumber(logic.getTotalString());
                  }
                  txt.setText(""+total1);
            }
        }
}

//Inner.java


package calculator;

public class Inner extends Calculators{
    public double total;
    public Inner()
    {
        total = 0;
    }
    public String getTotalString()
    {
        return "" + total;
    }
    public void setTotal(String n)
    {
        total = convertToNumber(n);
    }
    public void add(String n)
    {
        total += convertToNumber(n);
    }
    public void substract(String n)
    {
        total -= convertToNumber(n);
    }
    public void divide(String n)
    {
        total /= convertToNumber(n);
    }
    public void multiplication(String n)
    {
        total *=convertToNumber(n);
    }
    public void sqrt()
    {
        total = Math.sqrt(total);
    }
    public double convertToNumber(String n)
    {
        return Double.parseDouble(n);
    }
    public void sine()
    {
        total = super.sine(total);
    }
    public void cosine()
    {
        total = super.cosine(total);
    }
    public void tangent()
    {
        total =  super.tangent(total);
    }
    public void csc()
    {
        total = super.csc(total);
    }
    public void sec()
    {
        total = super.sec(total);
    }
    public void cot()
    {
        total = super.cot(total);
    }
    public void ln()
    {
        total = super.logarithm(total);
    }
    public void recipocal()
    {
        total = super.rec(total);
    }
}


//Calculators.java


package calculator;
import java.lang.Math;
public class Calculators {
    public double sine(double s)
    {
        return Math.sin(s);
    }
    public double cosine(double s)
    {
        return Math.cos(s);
    }
    public double tangent(double s)
    {
        return Math.tan(s);
    }
    public double csc (double s )
    {
        return 1.0 / Math.sin(s);
    }
    public double sec ( double s )
    {
        return 1.0 / Math.cos(s);
    }
    public double cot ( double s )
    {
        return 1.0 / Math.tan(s);
    }
    public double logarithm(double s)
    {
        return Math.log(s);
    }
    public double rec(double s)
    {
        return 1/s;
    }
}


//main.java

package calculator;

import javax.swing.*;
public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Calculator window = new Calculator("Calculator");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setVisible(true);
    }
}