PROGRAMA EN JAVA: INCREMENTAR

Se crea un formulario con estos componentes: Edit, Label, un Frame, 2 optionbuttons y un boton

El cçodigo es el siguiente.

import com.ms.wfc.app.*;

import com.ms.wfc.core.*;

import com.ms.wfc.ui.*;

import com.ms.wfc.html.*;

/**

* This class can take a variable number of parameters on the command

* line. Program execution begins with the main() method. The class

* constructor is not invoked unless an object of type 'Adder'

* created in the main() method.

*/

public class Adder extends Form implements IIncrement

{

IIncrement incr;

SingleStep ssObject;

public Adder()

{

super();

// Required for Visual J++ Form Designer support

initForm();

ssObject = new SingleStep();

rbAdder.setChecked(true);

}

/**

* Adder overrides dispose so it can clean up the

* component list.

*/

public void dispose()

{

super.dispose();

components.dispose();

}

// SAMPLE: Implement the interface

public int increment(int x)

{

return x + STEP;

}

private void btnIncrement_click(Object source, Event e)

{

int value;

value = Integer.parseInt(edtValue.getText());

value = incr.increment(value);

edtValue.setText(Integer.toString(value));

}

private void rbAdder_checkedChanged(Object source, Event e)

{

if(rbAdder.getChecked())

incr = this;

else

incr = ssObject;

}

/**

* NOTE: The following code is required by the Visual J++ form

* designer. It can be modified using the form editor. Do not

* modify it using the code editor.

*/

Container components = new Container();

Edit edtValue = new Edit();

Label label1 = new Label();

RadioButton rbAdder = new RadioButton();

RadioButton rbSingleStep = new RadioButton();

Button btnIncrement = new Button();

GroupBox groupBox1 = new GroupBox();

private void initForm()

{

this.setText("Adder");

this.setAutoScaleBaseSize(new Point(5, 13));

this.setClientSize(new Point(130, 172));

edtValue.setEnabled(false);

edtValue.setLocation(new Point(9, 24));

edtValue.setSize(new Point(112, 20));

edtValue.setTabIndex(0);

edtValue.setText("100");

edtValue.setTextAlign(HorizontalAlignment.RIGHT);

label1.setLocation(new Point(8, 8));

label1.setSize(new Point(40, 16));

label1.setTabIndex(1);

label1.setTabStop(false);

label1.setText("Value:");

rbAdder.setLocation(new Point(8, 24));

rbAdder.setSize(new Point(100, 16));

rbAdder.setTabIndex(0);

rbAdder.setText("Use &Adder");

rbAdder.addOnCheckedChanged(new EventHandler(this.rbAdder_checkedChanged));

rbSingleStep.setLocation(new Point(8, 48));

rbSingleStep.setSize(new Point(100, 16));

rbSingleStep.setTabIndex(1);

rbSingleStep.setText("Use &SingleStep");

btnIncrement.setLocation(new Point(27, 136));

btnIncrement.setSize(new Point(75, 23));

btnIncrement.setTabIndex(2);

btnIncrement.setText("&Increment");

btnIncrement.addOnClick(new EventHandler(this.btnIncrement_click));

groupBox1.setLocation(new Point(9, 48));

groupBox1.setSize(new Point(112, 72));

groupBox1.setTabIndex(3);

groupBox1.setTabStop(false);

groupBox1.setText("IIncrementer");

this.setNewControls(new Control[] {

groupBox1,

btnIncrement,

label1,

edtValue});

groupBox1.setNewControls(new Control[] {

rbSingleStep,

rbAdder});

}

/**

* The main entry point for the application.

*

* @param args Array of parameters passed to the application

* via the command line.

*/

public static void main(String args[])

{

Application.run(new Adder());

}

}

Se añaden dos clases, una que se llama Iincrement.java y otra que se llama SingleStep.java

El codigo del priimero es: “Iincrement.java”

public interface IIncrement

{

public int increment(int x);

public static final int STEP = 5;

}

Y el segundo es: “SingleStep.Java”

public class SingleStep implements IIncrement

{

public int increment(int x)

{

return x + 1;

}

}