import java.awt.FlowLayout;

import javax.swing.*;

public class calc_97_lvl {
	
public static JLabel jlab;
	
	calc_97_lvl() {
	
	ListenCalc LC=new ListenCalc();
	
	JFrame jfrm=new JFrame("Калькулятор Кузнецова");
    jfrm.setSize(185,157);
    jfrm.setLayout(new FlowLayout());
    jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jfrm.setVisible(true);
    JLabel jlab=new JLabel();
    jlab.setText("egeherjrj!");
    jlab.setSize(150, 150);
    
    JButton but1=new JButton("+");
    JButton but2=new JButton("-");
    JButton but3=new JButton("*");
    JButton but4=new JButton("/");
    JButton but5=new JButton(".");
    JButton but6=new JButton("e");
    JButton but7=new JButton("=");
    
    JButton b1=new JButton("1");
    JButton b2=new JButton("2");
    JButton b3=new JButton("3");
    JButton b4=new JButton("4");
    JButton b5=new JButton("5");
    JButton b6=new JButton("6");
    JButton b7=new JButton("7");
    JButton b8=new JButton("8");
    JButton b9=new JButton("9");
    JButton b0=new JButton("0");
    
    but1.addActionListener(LC);
    but2.addActionListener(LC);
    but3.addActionListener(LC);
    but4.addActionListener(LC);
    but5.addActionListener(LC);
    but6.addActionListener(LC);
    but7.addActionListener(LC);
   
    b1.addActionListener(LC);
    b2.addActionListener(LC);
    b3.addActionListener(LC);
    b4.addActionListener(LC);
    b5.addActionListener(LC);
    b6.addActionListener(LC);
    b7.addActionListener(LC);
    b8.addActionListener(LC);
    b9.addActionListener(LC);
    b0.addActionListener(LC);
    
    jfrm.add(jlab);
    jfrm.add(b1);
    jfrm.add(b2);
    jfrm.add(b3);
    jfrm.add(but1);
    jfrm.add(b4);
    jfrm.add(b5);
    jfrm.add(b6);
    jfrm.add(but2);
    jfrm.add(b7);
    jfrm.add(b8);
    jfrm.add(b9);
    jfrm.add(but3);
    jfrm.add(but5);
    jfrm.add(b0);
    jfrm.add(but6);
    jfrm.add(but7);
    
	} 
	public void set_jlab(String newText){jlab.setText(newText);}
	public static void main(String[] args){
        SwingUtilities.invokeLater(new Runnable(){
        	public void run(){
        		new calc_97_lvl();
        	    }
            });
    }}
	  









import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.StringTokenizer;


public class ListenCalc implements ActionListener  {
	

double numberResult;
	
	public void actionPerformed(ActionEvent ae){
		resultGiver(ae.getActionCommand());
	    }
	
	public double resultGiver(String textResult){
		StringTokenizer ST=new StringTokenizer(textResult, "+-*/e",true);
				
		   String s1=ST.nextToken();
		   String s2=ST.nextToken();
		   String s3=ST.nextToken();
		   double op1=Double.parseDouble(s1);
		   double op2=Double.parseDouble(s3);
		   if(s2.equals("+")){numberResult=op1+op2;}
		   else if(s2.equals("-")){numberResult=op1-op2;}
		   else if(s2.equals("*")){numberResult=op1*op2;}
		   else if(s2.equals("/")){numberResult=op1/op2;}
		   else{}
		return 0;
    }
}