Basiccal.java

package GUI;

//Download More code https://github.com/dotLK/

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class Basiccal {

    public static void main(String[] args) {

        clabody cal = new clabody();

    }

}

class clabody extends JFrame {
    
    double fn , sn , sum ;
    String what ;

    clabody() {

        setVisible(true);
        setTitle("My Cal");
        setSize(300, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        BorderLayout bd = new BorderLayout();

        JPanel p1 = new JPanel();
        //p1.setBackground(Color.red);
        JPanel p2 = new JPanel();
        p2.setBackground(Color.GREEN);

        add(p1, BorderLayout.NORTH);
        add(p2, BorderLayout.CENTER);

        TextField t1 = new TextField(15);
        t1.setFont(new Font("", 0, 30));
        p1.add(t1);

        GridLayout gl = new GridLayout(3, 3);
        p2.setLayout(gl);

        Button b1 = new Button("1");
        // b1.setBackground(Color.red);
        p2.add(b1);
        b1.setFont(new Font("", 0, 30));
        
        b1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                
               String v = t1.getText(); //0123               
              v += "1"; // 01231 +               
              t1.setText(v);
                
            }
        });

        Button b2 = new Button("2");
        //b2.setBackground(Color.BLUE);
        p2.add(b2);
        b2.setFont(new Font("", 0, 30));
        b2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
              
              String v = t1.getText(); //0123               
              v += "2"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b3 = new Button("3");
        // b3.setBackground(Color.GRAY);
        p2.add(b3);
        b3.setFont(new Font("", 0, 30));
        b3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               String v = t1.getText(); //0123               
              v += "3"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b4 = new Button("4");
        // b4.setBackground(Color.ORANGE);
        p2.add(b4);
        b4.setFont(new Font("", 0, 30));
        b4.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "4"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b5 = new Button("5");
        // b5.setBackground(Color.DARK_GRAY);
        p2.add(b5);
        b5.setFont(new Font("", 0, 30));
        b5.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "5"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b6 = new Button("6");
        // b6.setBackground(Color.PINK);
        p2.add(b6);
        b6.setFont(new Font("", 0, 30));
        b6.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "6"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b7 = new Button("7");
        // b7.setBackground(Color.red);
        p2.add(b7);
        b7.setFont(new Font("", 0, 30));
        b7.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "7"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b8 = new Button("8");
        // b8.setBackground(Color.darkGray);
        p2.add(b8);
        b8.setFont(new Font("", 0, 30));
        b8.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "8"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b9 = new Button("9");
        // b9.setBackground(Color.cyan);
        p2.add(b9);
        b9.setFont(new Font("", 0, 30));
        b9.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "9"; // 01231 +               
              t1.setText(v);
            }
        });

        Button b0 = new Button("0");
        p2.add(b0);
        b0.setFont(new Font("", 0, 30));
        b0.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "0"; // 01231 +               
              t1.setText(v);
            }
        });
        Button dot = new Button(".");
        p2.add(dot);
        dot.setFont(new Font("", 0, 30));
        dot.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String v = t1.getText(); //0123               
              v += "."; // 01231 +               
              t1.setText(v);
            }
        });
        Button clr = new Button("C");
        p2.add(clr);
        clr.setFont(new Font("", 0, 30));
        clr.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                t1.setText("");
                fn = 0.0;
                sn = 0.0;
                what= "";
            }
        });
        
        Button plus = new Button("+");
        p2.add(plus);
        plus.setFont(new Font("", 0, 30));
        plus.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
                fn = Double.parseDouble(t1.getText()) ;
                System.out.print(fn);
                t1.setText("");
                what = "+";
                System.out.print(what);
                
            }
        });

        Button min = new Button("-");
        p2.add(min);
        min.setFont(new Font("", 0, 30));
        min.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
                fn = Double.parseDouble(t1.getText()) ;
                System.out.print(fn);
                t1.setText("");
                what = "-";
                System.out.print(what);
            }
        });

        Button mul = new Button("*");
        p2.add(mul);
        mul.setFont(new Font("", 0, 30));
        mul.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
                fn = Double.parseDouble(t1.getText()) ;
                System.out.print(fn);
                t1.setText("");
                what = "*";
                System.out.print(what);
            }
        });
        Button devi = new Button("/");
        p2.add(devi);
        devi.setFont(new Font("", 0, 30));
        devi.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
                fn = Double.parseDouble(t1.getText()) ;
                System.out.print(fn);
                t1.setText("");
                what = "/";
                System.out.print(what);
            }
        });
        Button sqr = new Button("√");
        p2.add(sqr);
        sqr.setFont(new Font("", 0, 30));
        sqr.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
             // math.sqtr();
             double sq = Double.valueOf(t1.getText());
            
             double ans =  Math.sqrt(sq) ;
                System.out.println(ans);
             t1.setText(String.valueOf(ans));
             
                
            }
        });
        Button qe = new Button("=");
        p2.add(qe);
        qe.setFont(new Font("", 0, 30));
        qe.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
               
                sn = Double.parseDouble(t1.getText()) ;
                System.out.print(sn);
                sum = cal(fn, sn, what);
                System.out.println(" = " +sum);
                t1.setText(String.valueOf(sum));
                
            }
        });
        
        MenuBar mb = new MenuBar();
        setMenuBar(mb);

        Menu m1 = new Menu("File");
        Menu m2 = new Menu("Edit");
        Menu m3 = new Menu("View");
        mb.add(m1);
        mb.add(m2);
        mb.add(m3);

        MenuItem m_new = new MenuItem("New File");
        MenuItem m_save = new MenuItem("Save");
        MenuItem m_Exit = new MenuItem("Exit");
        m1.add(m_new);
        m1.add(m_save);
        m1.add(m_Exit);
        m_Exit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(rootPane, "Hi iam java...!!");
            }
        });
    }
public double cal(double a , double b ,String w){
 
    double tot = 0;
 
    if (w.equals("+")) {
        tot =  a+ b;
        
    } else if(w.equals("-")) {
        tot =  a -  b;
    
    } else if(w.equals("*")) {
        tot =  a  *  b;
    
    } else if(w.equals("/")) {
        tot =  a  /  b;
    }
 
return tot ;
}
}