import java.util.*;
import java.awt.*;
//import  java.awt.ActionListener;
//Leornado da vinte kkkk
import javax.swing.*;
class Calc{
    static char aux=' ';
	static int num1=0,num2=0,result=0;

	static String n="";
	public static void main(String args[]){

		JFrame jan=new JFrame();

		jan.setVisible(true);
		jan.setResizable(false);


		jan.setBounds(0,0,0,0);
		jan.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jan.setSize(240,160);
		JPanel painel = new JPanel();

		jan.add(painel);

		JButton btnresult = new JButton("+");
		JButton btnSubt = new JButton("-");
		JButton btnMult = new JButton("*");
		JButton btnDiv  = new JButton("/");
		JButton btnIgual = new JButton("=");
		JButton btnApagar =new JButton("CE");

		JButton btnOne 	 	= new JButton("1");
		JButton btnTwo  	= new JButton("2");
		JButton btnThree 	= new JButton("3");
		JButton btnFour 	= new  JButton("4");
		JButton btnFive		= new JButton("5");
		JButton btnSix		= new JButton("6");
		JButton btnSeven	= new JButton("7");
		JButton btnHeigh	= new JButton("8");
		JButton btnNine		= new JButton("9");
		JButton btnZero     = new JButton("0");


		JTextField campo = new JTextField(10);
		jan.setTitle("Calculadora");

		jan.add(painel);
		painel.add(campo);
		painel.add(btnresult);
		painel.add(btnSubt);
		painel.add(btnMult);
		painel.add(btnDiv);
		painel.add(btnApagar);

		painel.add(btnOne);
		painel.add(btnTwo);
		painel.add(btnThree);
		painel.add(btnFour);
		painel.add(btnFive);
		painel.add(btnSix);
		painel.add(btnSeven);
		painel.add(btnHeigh);
		painel.add(btnNine);
		painel.add(btnZero);
		painel.add(btnIgual);

		//JOptionPane.showMessageDialog(null,"oo");


		btnOne.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="1";
				campo.setText(n);


				if(aux==' '){
					num1=1;
					//a1++;
				}else{
				//	a1=0;
					num2=1;
				}

				//JOptionPane.showMessageDialog(null,num1);
				//JOptionPane.showMessageDialog(null,num2);
			}

		});

		btnTwo.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="2";
				campo.setText(n);
				if (aux==' '){
					num1=2;

				}else{
					num2=2;
				}
			}
		});

		btnThree.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="3";
				campo.setText(n);
				 if(aux==' '){
				 	num1=3;
				 }else{
				 	num2=3;
				 }


			}

		});

		btnFour.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="4";
				campo.setText(n);
				if(aux==' '){
					num1=4;
				}else{
					num2=4;
				}
			}

		});
		btnFive.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="5";
				campo.setText(n);
				if(aux==' '){
					num1=5;
				}else{
					num2=5;
				}
			}

		});
		btnSix.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="6";
				campo.setText(""+n);
				if(aux==' '){
					num1=6;
				}else{
					num2=6;
				}
			}

		});
		btnSeven.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="7";
				campo.setText(n);
				if(aux==' '){
					num1=7;
				}else{
					num2=7;
				}
			}

		});
		btnHeigh.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="8";
				campo.setText(n);
				if(aux==' '){
					num1=8;
				}else{
					num2=8;
				}

			}

		});
		btnNine.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="9";
				campo.setText(n);
				if(aux==' '){
					num1=9;
				}else{
					num2=9;
				}
			}

		});
		btnZero.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n+="0";
				campo.setText(n);
				if(aux==' '){
					num1=0;
				}else{
					num2=0;
				}

			}

		});

		btnApagar.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				n="";
				campo.setText(n);
				num1=0;
				num2=0;
			//	aux_n=0;
			}

		});
		btnresult.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){

				n+="+";
				campo.setText(n);
				aux='+';

			}

		});

		btnSubt.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				aux='-';
				n+="-";
				campo.setText(n);
			}
		});//fim btnSubt

		btnMult.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				aux='*';
				n+="*";
				campo.setText(n);
			}
		});
		btnDiv.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				aux='/';
				n+="/";
				campo.setText(n);
			}
		});

		btnIgual.addActionListener(new java.awt.event.ActionListener(){
			public void actionPerformed(java.awt.event.ActionEvent e){
				//campo.setText("o valor de num1 "+num1);
				switch(aux){
					case '+':
					result=0;
					result=num1+num2;
					num1=0;
					num2=0;
					campo.setText(" "+result);
					break;
					case '-':
					result=0;
					result=num1-num2;
					num1=0;
					num2=0;
					campo.setText(" "+result);
					break;
					case '*':
					result=0;
					result=num1*num2;
					num1=0;
					num2=0;
					campo.setText(" "+result);
					break;

					case '/':
					result=0;
					if(num2!=0){
						result=num1/num2;
					}else{
						campo.setText("Erro!");
					}
					campo.setText(" "+result);
					break;

					default:
						campo.setText("Erro!");
						break;

				}
				result=0;
				n=" ";
				num1=0;
				num2=0;
				aux=' ';

			}
			//result=0;
		});
		//fim btnIgual




		}
}