Calculadora.java - Githubissues

import java.awt.; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.; import java.util.ArrayList;
public class Calculadora extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JPanel janela;
private JTextField Area_Texto;
private JButton n1,n2,n3,n4,n5,n6,n7,n8,n9,n0,mai,men,div,mul,igu;
int valor1 =0, valor2 =0, resultado =0;

public Calculadora(){

    super("CALCULADORA");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    Container janela;
    janela = getContentPane();
    janela.setLayout (new GridLayout(5,5));

    Area_Texto = new JTextField (12);
    Area_Texto.setEditable(false);
    n1 = new JButton ("1");
    n1.addActionListener(this);
    n2 = new JButton ("2");
    n2.addActionListener(this);
    n3 = new JButton ("3");
    n3.addActionListener(this);
    n4 = new JButton ("4");
    n4.addActionListener(this);
    n5 = new JButton ("5");
    n5.addActionListener(this);
    n6 = new JButton ("6");
    n6.addActionListener(this);
    n7 = new JButton ("7");
    n7.addActionListener(this);
    n8 = new JButton ("8");
    n8.addActionListener(this);
    n9 = new JButton ("9");
    n9.addActionListener(this);
    n0 = new JButton ("0");
    n0.addActionListener(this);
    mai = new JButton ("+");
    mai.addActionListener(this);
    men = new JButton ("-");
    men.addActionListener(this);
    div = new JButton ("/");
    div.addActionListener(this);
    mul = new JButton ("x");
    mul.addActionListener(this);
    igu = new JButton ("=");
    igu.addActionListener(this);

    janela.add(div);
    janela.add(mul);
    janela.add(men);
    janela.add(mai);
    janela.add(n7);
    janela.add(n8);
    janela.add(n9);
    janela.add(Area_Texto);
    janela.add(n4);
    janela.add(n5);
    janela.add(n6);
    janela.add(igu);
    janela.add(n1);
    janela.add(n2);
    janela.add(n3);
    janela.add(n0);

}

public static void main(String[] args) {
    Calculadora Calculadora = new Calculadora();
    JFrame.setDefaultLookAndFeelDecorated(true);
    Calculadora.setVisible(true);
    Calculadora.setSize(300,300);

    //ArrayList<int> numeros = new ArrayList<int> ();

}

public void actionPerformed(ActionEvent e) {
    // TODO Stub de método gerado automaticamente

    if (e.getSource() == n0){
    Area_Texto.setText(Area_Texto.getText() + "0");
    }if (e.getSource() == n1){
    Area_Texto.setText(Area_Texto.getText() + "1");
    }if (e.getSource() == n2){
    Area_Texto.setText(Area_Texto.getText() + "2");
    }if (e.getSource() == n3){
    Area_Texto.setText(Area_Texto.getText() + "3");
    }if (e.getSource() == n4){
    Area_Texto.setText(Area_Texto.getText() + "4");
    }if (e.getSource() == n5){
    Area_Texto.setText(Area_Texto.getText() + "5");
    }if (e.getSource() == n6){
    Area_Texto.setText(Area_Texto.getText() + "6");
    }if (e.getSource() == n7){
    Area_Texto.setText(Area_Texto.getText() + "7");
    }if (e.getSource() == n8){
    Area_Texto.setText(Area_Texto.getText() + "8");
    }if (e.getSource() == n9){
    Area_Texto.setText(Area_Texto.getText() + "9");
    }if(e.getSource() == mai){
        valor1 = Integer.parseInt(Area_Texto.getText());
        Area_Texto.setText("");
        if (e.getSource() == n0){
        Area_Texto.setText(Area_Texto.getText() + "0");
        }if (e.getSource() == n1){
        Area_Texto.setText(Area_Texto.getText() + "1");
        }if (e.getSource() == n2){
        Area_Texto.setText(Area_Texto.getText() + "2");
        }if (e.getSource() == n3){
        Area_Texto.setText(Area_Texto.getText() + "3");
        }if (e.getSource() == n4){
        Area_Texto.setText(Area_Texto.getText() + "4");
        }if (e.getSource() == n5){
        Area_Texto.setText(Area_Texto.getText() + "5");
        }if (e.getSource() == n6){
        Area_Texto.setText(Area_Texto.getText() + "6");
        }if (e.getSource() == n7){
        Area_Texto.setText(Area_Texto.getText() + "7");
        }if (e.getSource() == n8){
        Area_Texto.setText(Area_Texto.getText() + "8");
        }if (e.getSource() == n9){
        Area_Texto.setText(Area_Texto.getText() + "9");
        }if(e.getSource() == igu){
        valor2 = Integer.parseInt(Area_Texto.getText());
        resultado = valor1 + valor2;
        Area_Texto.setText("" + resultado);
        JOptionPane.showMessageDialog(null, resultado + valor1 + valor2 + " foi");
        }
        JOptionPane.showMessageDialog(null, valor1 + resultado + " n foi");
    } 
    else{
    //  JOptionPane.showMessageDialog(null, "PRESSIONOU CANCELAR");
    }
}
}
rockpraxedes / Java

Calculadora.java #1
