Calculadora en JCreator con Applet – Java

Este fin de semana tuve que entregar como parte de mi evaluación de la materia una calculadora en Java, y esto fue el resultado:

Descarga Calculadora.rar

/**
* @(#)Calculadora.java
*
*
* @Jesús Manuel González Gómez
* @Calculadora version 1.00 2007/11/10
*/

public class Calculadora extends Applet
{
public void init()
{
Interfaz();
}
public void Interfaz()
{
//Se declaran toda la parte de interfaz.
lab_1 = new Label ();
lab_1.setBounds(20,60,260,30);
lab_1.setFont(new Font(“serif”, Font.BOLD, 20));
lab_1.setBackground(Color.lightGray);
lab_2 = new Label (“** Calculadora **”);
lab_2.setBounds(70,30,160,20);
lab_2.setFont(new Font(“serif”, Font.BOLD, 20));
lab_2.setBackground(Color.lightGray);
lab_2.setForeground(Color.blue);
tex_1 = new TextField ();
tex_1.setBounds(20,100,260,30);
tex_1.setFont(new Font(“serif”, Font.BOLD, 20));
tex_1.setEditable(false);
but_0 = new Button(“0″);
but_0.setBounds(20,290,92,40);
but_0.setFont(new Font(“serif”, Font.BOLD, 20));
but_0.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”0″);
}
});
but_1 = new Button(“1″);
but_1.setBounds(20,150,46,46);
but_1.setFont(new Font(“serif”, Font.BOLD, 20));
but_1.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”1″);
}
});
but_2 = new Button(“2″);
but_2.setBounds(66,150,46,46);
but_2.setFont(new Font(“serif”, Font.BOLD, 20));
but_2.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”2″);
}
});
but_3 = new Button(“3″);
but_3.setBounds(112,150,46,46);
but_3.setFont(new Font(“serif”, Font.BOLD, 20));
but_3.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”3″);
}
});
but_4 = new Button(“4″);
but_4.setBounds(20,196,46,46);
but_4.setFont(new Font(“serif”, Font.BOLD, 20));
but_4.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”4″);
}
});
but_5 = new Button(“5″);
but_5.setBounds(66,196,46,46);
but_5.setFont(new Font(“serif”, Font.BOLD, 20));
but_5.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”5″);
}
});
but_6 = new Button(“6″);
but_6.setBounds(112,196,46,46);
but_6.setFont(new Font(“serif”, Font.BOLD, 20));
but_6.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”6″);
}
});
but_7 = new Button(“7″);
but_7.setBounds(20,242,46,46);
but_7.setFont(new Font(“serif”, Font.BOLD, 20));
but_7.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”7″);
}
});
but_8 = new Button(“8″);
but_8.setBounds(66,242,46,46);
but_8.setFont(new Font(“serif”, Font.BOLD, 20));
but_8.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”8″);
}
});
but_9 = new Button(“9″);
but_9.setBounds(112,242,46,46);
but_9.setFont(new Font(“serif”, Font.BOLD, 20));
but_9.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”9″);
}
});
but_pun = new Button(“,”);
but_pun.setBounds(112,290,46,40);
but_pun.setFont(new Font(“serif”, Font.BOLD, 20));
but_pun.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
tex_1.setText(tex_1.getText()+”.”);
}
});
but_mas = new Button(“+”);
but_mas.setBounds(188,242,46,92);
but_mas.setFont(new Font(“serif”, Font.BOLD, 20));
but_mas.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
mas();
}
});
but_men = new Button(“-”);
but_men.setBounds(234,288,46,46);
but_men.setFont(new Font(“serif”, Font.BOLD, 20));
but_men.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
menos();
}
});
but_por = new Button(“*”);
but_por.setBounds(188,196,46,46);
but_por.setFont(new Font(“serif”, Font.BOLD, 20));
but_por.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
por();
}
});
but_div = new Button(“/”);
but_div.setBounds(234,196,46,46);
but_div.setFont(new Font(“serif”, Font.BOLD, 20));
but_div.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
divide();
}
});
but_mod = new Button(“mem”); //Merodo para guardar en memoria
but_mod.setBounds(234,242,46,46);
but_mod.setFont(new Font(“serif”, Font.BOLD, 20));
but_mod.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
mod();
}
});
but_igu = new Button(“=”);
but_igu.setBounds(75,345,150,55);
but_igu.setFont(new Font(“serif”, Font.BOLD, 20));
but_igu.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
resultado();
}
});
but_mm = new Button(“+/-”);
but_mm.setBounds(234,150,46,42);
but_mm.setFont(new Font(“serif”, Font.BOLD, 20));
but_mm.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
mm();
}
});
but_bor = new Button(“C A”);
but_bor.setBounds(188,150,46,42);
but_bor.setFont(new Font(“serif”, Font.BOLD, 20));
but_bor.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
borrar();
}
});

//Se añaden los objetos
add(lab_2);
add(lab_1);
add(tex_1);
add(but_1); add(but_2); add(but_3);
add(but_4); add(but_5); add(but_6);
add(but_7); add(but_8); add(but_9);
add(but_0) ; add(but_pun);
add(but_por); add(but_div);
add(but_mas); add(but_mod);
add(but_men);
add(but_igu);
add(but_bor); add(but_mm);
//Color de fondo
setBackground(Color.white);
setLayout(null);

}

public void mm() //Metodo para cambial el signo alas cantidades
{
double num;
num=Double.parseDouble(tex_1.getText());
num=num*(-1);
tex_1.setText(Double.toString(num));
}

public void mas() //Metodo para sumar
{
ope = ‘+’;
//resultado();
mat[0]=Double.parseDouble(tex_1.getText());
lab_1.setText(tex_1.getText()+ope);
tex_1.setText(“”);
}

public void menos() //Metodo para restar
{
ope = ‘-’;
mat[0]=Double.parseDouble(tex_1.getText());
lab_1.setText(tex_1.getText()+” – “);
tex_1.setText(“”);
}

public void por() //Metodo para Multiplicar
{
ope = ‘*’;
mat[0]=Double.parseDouble(tex_1.getText());
lab_1.setText(tex_1.getText()+” * “);
tex_1.setText(“”);

}

public void divide() //Metodo para Dividir
{
ope = ‘/’;
mat[0]=Double.parseDouble(tex_1.getText());
lab_1.setText(tex_1.getText()+” / “);
tex_1.setText(“”);
}

public void mod() //Metodo para guardar en memoria
{
ope = ‘m’;
mat[0]=Double.parseDouble(tex_1.getText());
lab_1.setText(tex_1.getText()+” mod “);
tex_1.setText(“”);
}

public void borrar() //Borran cantidad
{
mat[0]=mat[1]=mat[2]=0;
lab_1.setText(“No Hay Operacion…”);
tex_1.setText(“”);
ope=’0′;
}

public void resultado() //Mostrar el resultado
{

if (tex_1.getText().equals(“”))
{
mat[1]=0;
}
else
{
mat[1]=Double.parseDouble(tex_1.getText());
lab_1.setText(Double.toString(mat[0])+ope+Double.toString(mat[1]));
switch (ope)
{
case ‘+’:
mat[2]=mat[0]+mat[1];
tex_1.setText(Double.toString(mat[2]));
break;
case ‘-’:
mat[2]=mat[0]-mat[1];
tex_1.setText(Double.toString(mat[2]));
break;
case ‘*’:
mat[2]=mat[0]*mat[1];
tex_1.setText(Double.toString(mat[2]));
break;
case ‘/’:
mat[2]=mat[0]/mat[1];
tex_1.setText(Double.toString(mat[2]));
break;
case ‘m’:
mat[2]=mat[0]%mat[1];
tex_1.setText(Double.toString(mat[2]));
break;
}
mat[0]=mat[2];
mat[1]=0;
}
}

TextField tex_1;
Label lab_1,lab_2;
Button but_0,but_1,but_2,but_3,but_4,but_5,but_6,but_7,but_8,but_9,but_mas,but_men,but_por,but_div,but_mod,but_igu,but_bor,but_pun,but_mm;
double[] mat = new double[]{0,0,0};
char ope=’0′;
}