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Hallo,
I'm new here...
I want to built the application which is after the application run, user can make two point with mouse and after that the system will calculate the distance between two point...
So can java do that?
If yes, can someone help me in this issues?
Everyone can help me.
<Added>
And i want the source code that can move the line using mouse
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import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import javax.swing.*;
public class MousePoints extends JPanel
{
Point start;
Point end;
JLabel label;
NumberFormat nf;
int lastPoint;
final int START_POINT = 0;
final int END_POINT = 1;
public MousePoints()
{
start = new Point(-2,-2);
end = new Point(-2,-2);
nf = NumberFormat.getInstance();
nf.setMaximumFractionDigits(1);
lastPoint = END_POINT;
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.drawLine(start.x, start.y, end.x, end.y);
g2.setPaint(Color.red);
g2.fillRect(start.x-2, start.y-2, 4, 4);
g2.fillRect(end.x-2, end.y-2, 4, 4);
}
public void setPoint(Point p)
{
if(lastPoint == START_POINT)
{
end = p;
lastPoint = END_POINT;
}
else
{
if(end.x == -2) // for the first time
end = p;
start = p;
lastPoint = START_POINT;
}
setDistance();
repaint();
}
private void setDistance()
{
double distance = start.distance(end);
label.setText(nf.format(distance));
}
private JLabel getLabel()
{
label = new JLabel();
label.setHorizontalAlignment(JLabel.CENTER);
Dimension d = label.getPreferredSize();
d.height = 35;
label.setPreferredSize(d);
return label;
}
public static void main(String[] args)
{
MousePoints mp = new MousePoints();
PointPlacer placer = new PointPlacer(mp);
mp.addMouseListener(placer);
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(mp);
f.getContentPane().add(mp.getLabel(), "South");
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
}
}
class PointPlacer extends MouseAdapter
{
MousePoints mousePoints;
public PointPlacer(MousePoints mp)
{
mousePoints = mp;
}
public void mousePressed(MouseEvent e)
{
mousePoints.setPoint(e.getPoint());
}
}
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Thank you crwood....
I i have any problem, can i ask you again?
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Ok..
I hava stupid question i think...
Can i put java coding in php coding?
And java and javascript.. Is that similar thing?
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amain
