в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:24:32Z

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== java.awt.Point ==

<OL><LI>A Point object represents a point in a coordinate system.</LI><LI>It has two int fields, x and y.</LI><LI>You can construct a Point object by using one of its constructors.</LI></OL>



<source lang="java">
public Point ()
public Point (int x, int y)
public Point (Point anotherPoint)</source>



<p>The Point class"s getX and getY methods return the value of the x and y fields in double, respectively.</p>

== Playing with Point Objects ==



<source lang="java">
import java.awt.Point;
public class MainClass {
public static void main(String[] args) {
Point aPoint = new Point(); // Initialize to 0,0
Point bPoint = new Point(50, 25);
Point cPoint = new Point(bPoint);
System.out.println("aPoint is located at: " + aPoint);
aPoint.move(100, 50); // Change to position 100,50
bPoint.x = 110;
bPoint.y = 70;
aPoint.translate(10, 20); // Move by 10 in x and 20 in y
System.out.println("aPoint is now at: " + aPoint);
if (aPoint.equals(bPoint))
System.out.println("aPoint and bPoint are at the same location.");
}
}</source>



<pre class=codeResult>aPoint is located at: java.awt.Point[x=0,y=0]
aPoint is now at: java.awt.Point[x=110,y=70]
aPoint and bPoint are at the same location.</pre>

== Point class ==



<source lang="java">
import java.awt.Point;
class PointSetter {
public static void main(String[] arguments) {
Point location = new Point(4, 13);
System.out.println("Starting location:");
System.out.println("X equals " + location.x);
System.out.println("Y equals " + location.y);
System.out.println("\nMoving to (7, 6)");
location.x = 7;
location.y = 6;
System.out.println("\nEnding location:");
System.out.println("X equals " + location.x);
System.out.println("Y equals " + location.y);
}
}</source>

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