Java Tutorial/2D Graphics/Point

java.awt.Point

1. A Point object represents a point in a coordinate system.
2. It has two int fields, x and y.
3. You can construct a Point object by using one of its constructors.

   <source lang="java">

public Point () public Point (int x, int y) public Point (Point anotherPoint)</source>

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

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>

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.

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>