bi = new BufferedImage[4]; String s[] = { "bld.jpg", "bld.jpg", "boat.gif", "boat.gif"}; for ( int i = 0; i < bi.length; i++ ) { Image img = getImage(getURL("images/" + s[i])); try { MediaTracker tracker = new MediaTracker(this); tracker.addImage(img, 0); tracker.waitForID(0); } catch ( Exception e ) {} int iw = img.getWidth(this); int ih = img.getHeight(this); bi[i] = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB); Graphics2D big = bi[i].createGraphics(); big.drawImage(img,0,0,this); }
addNotify(); Insets insets = getInsets(); // from inside one container then you get ... insets.top insets.bottom insets.left insets.right
solveRecursively(Problem p) { if (p is trivial) return(the obvious answer); // else simplify the problem Problem p1 = simplerProblem(p); s1 = solveRecursively(p1); // Turn the solution of simpler pb into solution of original problem s = solutionOfOriginalProblem(s1); return s1; }
To test the effectiveness of that procedure, you should try with a file that
contains at least 2
Classes
package net.vuylsteker.test
CLASSPATH="$CLASSPATH;Z:\ClassDir"
export CLASSPATH
Z:\ClassDir"
HelloWord.javaimport net.vuylsteker.test.*
JFileChooser chooser = new JFileChooser(); int returnVal = chooser.showOpenDialog(this); if(returnVal == JFileChooser.APPROVE_OPTION) { fichier = chooser.getSelectedFile(); System.out.println("You chose to open this file: " + fichier.getName()); System.out.println("You chose to open this file: " + fichier.getAbsolutePath()); }
class ShowPanel extends JPanel implements MouseListener, MouseMotionListener { ShowPanel(File f) { addMouseMotionListener(this); addMouseListener(this); setBackground(Color.white);
../.. } // Handles the event of the user pressing down the mouse button.
public void mousePressed(MouseEvent e) {
last_x = rect.x - e.getX();
last_y = rect.y - e.getY();
// Checks whether or not the cursor is inside of the rectangle
// while the user is pressing the mouse.
if ( rect.contains(e.getX(), e.getY()) ) {
updateLocation(e);
} else {
System.out.println("First position the cursor on the rectangle and then drag.");
pressOut = true;
}
}
// Handles the event of a user dragging the mouse while holding
// down the mouse button.
public void mouseDragged(MouseEvent e) {
if ( !pressOut ) {
updateLocation(e);
} else {
System.out.println("First position the cursor on the rectangle and then drag.");
}
}
// Handles the event of a user releasing the mouse button.
public void mouseReleased(MouseEvent e) {
// Checks whether or not the cursor is inside of the rectangle
// when the user releases the mouse button.
if ( rect.contains(e.getX(), e.getY()) ) {
updateLocation(e);
} else {
System.out.println("First position the cursor on the rectangle and then drag.");
pressOut = false;
}
}
// This method is required by MouseListener.
public void mouseMoved(MouseEvent e) {}
// These methods are required by MouseMotionListener.
public void mouseClicked(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
// Updates the coordinates representing the location of the current rectangle.
public void updateLocation(MouseEvent e) {
rect.setLocation(last_x + e.getX(), last_y + e.getY());
/*
* Updates the label to reflect the location of the
* current rectangle
* if checkRect returns true; otherwise, returns error message.
*/
if (checkRect()) {
System.out.println("Rectangle located at " + rect.getX() + ", " + rect.getY());
} else {
System.out.println("Please don't try to "+ " drag outside the area.");
}
repaint();
} public void paintComponent(Graphics g) { super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
// Draws and fills the newly positioned rectangle.
g2.setPaint(Color.red);
g.drawString("Bonjour... "+name, 20, 20);
g.drawImage(img,rect.x,rect.y,null); }