Borrar figuras geometricas con paint Bueno mi problema es que estoy haciendo una aplicación JAVA en la cual varias veces pinto distintas figuras, pero estas se me van acumulando en el jframe, y la verdad no quiero que eso pase. Lo que quiero es que cuando el programa dibuje una nueva figura la anterior se borre. El proyecto lo estoy haciendo en Netbeans 6.9.
Nota: Si la variable figura = 1 se pinta un cuadrado
figura = 2 se pinta un circulo
Si la variable color = 1 se pinta de rojo
color = 2 se pinta de azul
Estructura
Hay dos clases:
Clase 1: Contiene el codigo del jframe y la funcion paint para pintar
package Frame;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
/**
*
* @author Administrador
*/
public class framePrueba extends javax.swing.JFrame implements ActionListener,
WindowListener{
public boolean actualizar = false;
public figuras f;
/** Creates new form framePrueba */
public framePrueba() {
f= new figuras(1,1);
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
pintar = new javax.swing.JButton();
figure = new javax.swing.JTextField();
color = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);
pintar.setText("Pinta");
pintar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
pintarActionPerformed(evt);
}
});
jLabel1.setText("Color");
jLabel2.setText("Figura");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILI NG, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addGap(51, 51, 51)
.addComponent(pintar)
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED, 79, Short.MAX_VALUE)
.addComponent(jLabel2))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)))
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING, false)
.addComponent(figure)
.addComponent(color, javax.swing.GroupLayout.DEFAULT_SIZE, 46, Short.MAX_VALUE))
.addGap(125, 125, 125))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
.addComponent(pintar)
.addComponent(figure, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
.addComponent(color, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addContainerGap(232, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void pintarActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int fig = Integer.parseInt(figure.getText());
int col = Integer.parseInt(color.getText());
if(!actualizar){
f = new figuras(fig,col);
actualizar = true;
} else
{
f.setColor(col);
f.setFigura(fig);
}
repaint();
}
public void paint(Graphics g)
{
try{
f.dibujando(g);
}catch (Exception e)
{
System.out.print("Los datos aun no han sido ingresados");
}
// repaint();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/*java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new framePrueba().setVisible(true);
}
});*/
framePrueba f = new framePrueba();
f.setSize(500,500);
f.setVisible(true);
}
// Variables declaration - do not modify
private javax.swing.JTextField color;
private javax.swing.JTextField figure;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JButton pintar;
// End of variables declaration
public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowOpened(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowClosing(WindowEvent e) {
System.exit(0);
}
public void windowClosed(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowIconified(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowDeiconified(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowActivated(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowDeactivated(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
}
--------------------------------------------------------------------------------------------------------
Clase 2: Se llama figura y contiene los metodos para dibujar la figura que se le indique desde el metodo paint del jframe.
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Frame;
import java.awt.Color;
import java.awt.Graphics;
/**
*
* @author Administrador
*/
public class figuras {
private int figura;
private int color;
public figuras(int figura, int color)
{
this.figura=figura;
this.color=color;
}
public void dibujando(Graphics g)
{
if(figura == 1)
{
if(color == 1){
g.setColor(Color.red);
g.fillRect(100, 100, 50, 50);
}else
{
g.setColor(Color.BLUE);
g.fillRect(100, 100, 50, 50);
}
}else
{
if(color == 1){
g.setColor(Color.red);
g.fillOval(100, 100, 50, 50);
}else
{
g.setColor(Color.BLUE);
g.fillOval(100, 100, 50, 50);
}
}
}
/**
* @param figura the figura to set
*/
public void setFigura(int figura) {
this.figura = figura;
}
/**
* @param color the color to set
*/
public void setColor(int color) {
this.color = color;
}
}
Gracias!!!!
