Codigo1 (Principal.java):
package Recortar;
public class Principal extends javax.swing.JFrame {
public Principal() {
initComponents();
this.setLocationRelativeTo(null);
}
private void initComponents() { ... }
private void jButtonIniciarActionPerformed(java.awt.event.ActionEvent evt) {
Imagen im = new Imagen(jPanel1);
jPanel1.add(im).repaint();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Principal().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButtonIniciar;
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
Codigo 2 (Imagen.java):
package Recortar;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
public class Imagen extends javax.swing.JPanel {
int x, y;
public Imagen(JPanel jPanel1) {
this.x = jPanel1.getWidth();
this.y = jPanel1.getHeight();
this.setSize(x, y);
}
@Override
public void paint(Graphics g) {
BufferedImage imagen, recorte;
try {
File f = new File("src/Images/imagen1.png");
imagen = ImageIO.read(f);
g.drawImage(imagen, 0, 0, this);
recorte = ((BufferedImage) imagen).getSubimage(150, 150, 150, 150);
g.drawImage(recorte, 0, 0, this);
} catch (IOException ex) { }
}
}
Resultado:
