Java by API/java.awt/Point

Материал из Java эксперт
Версия от 14:23, 31 мая 2010; Admin (обсуждение | вклад) (1 версия)
(разн.) ← Предыдущая | Текущая версия (разн.) | Следующая → (разн.)
Перейти к: навигация, поиск

new Point(int x, int y)

 
/*
 * Output:
cPoint is located at: java.awt.Point[x=50,y=25]
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.
 
 * */
import java.awt.Point;
public class MainClass {
  public static void main(String[] args) {
    Point aPoint = new Point();
    Point bPoint = new Point(50, 25);
    Point cPoint = new Point(bPoint);
    
    System.out.println("cPoint is located at: " + cPoint);
    
    System.out.println("aPoint is located at: " + aPoint);
    aPoint.move(100, 50);
    bPoint.x = 110;
    bPoint.y = 70;
    aPoint.translate(10, 20);
    System.out.println("aPoint is now at: " + aPoint);
    if (aPoint.equals(bPoint))
      System.out.println("aPoint and bPoint are at the same location.");
  }
}





new Point(Point p)

 
/*
 * Output:
cPoint is located at: java.awt.Point[x=50,y=25]
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.
 
 * */
import java.awt.Point;
public class MainClass {
  public static void main(String[] args) {
    Point aPoint = new Point();
    Point bPoint = new Point(50, 25);
    Point cPoint = new Point(bPoint);
    
    System.out.println("cPoint is located at: " + cPoint);
    
    System.out.println("aPoint is located at: " + aPoint);
    aPoint.move(100, 50);
    bPoint.x = 110;
    bPoint.y = 70;
    aPoint.translate(10, 20);
    System.out.println("aPoint is now at: " + aPoint);
    if (aPoint.equals(bPoint))
      System.out.println("aPoint and bPoint are at the same location.");
  }
}





Point: equals(Object p)

 
/*
 * Output:
cPoint is located at: java.awt.Point[x=50,y=25]
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.
 
 * */
import java.awt.Point;
public class MainClass {
  public static void main(String[] args) {
    Point aPoint = new Point();
    Point bPoint = new Point(50, 25);
    Point cPoint = new Point(bPoint);
    
    System.out.println("cPoint is located at: " + cPoint);
    
    System.out.println("aPoint is located at: " + aPoint);
    aPoint.move(100, 50);
    bPoint.x = 110;
    bPoint.y = 70;
    aPoint.translate(10, 20);
    System.out.println("aPoint is now at: " + aPoint);
    if (aPoint.equals(bPoint))
      System.out.println("aPoint and bPoint are at the same location.");
  }
}





Point: move(int x, int y)

 
/*
 * Output:
cPoint is located at: java.awt.Point[x=50,y=25]
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.
 
 * */
import java.awt.Point;
public class MainClass {
  public static void main(String[] args) {
    Point aPoint = new Point();
    Point bPoint = new Point(50, 25);
    Point cPoint = new Point(bPoint);
    
    System.out.println("cPoint is located at: " + cPoint);
    
    System.out.println("aPoint is located at: " + aPoint);
    aPoint.move(100, 50);
    bPoint.x = 110;
    bPoint.y = 70;
    aPoint.translate(10, 20);
    System.out.println("aPoint is now at: " + aPoint);
    if (aPoint.equals(bPoint))
      System.out.println("aPoint and bPoint are at the same location.");
  }
}





Point: translate(int dx, int dy)

 
/*
 * Output:
cPoint is located at: java.awt.Point[x=50,y=25]
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.
 
 * */
import java.awt.Point;
public class MainClass {
  public static void main(String[] args) {
    Point aPoint = new Point();
    Point bPoint = new Point(50, 25);
    Point cPoint = new Point(bPoint);
    
    System.out.println("cPoint is located at: " + cPoint);
    
    System.out.println("aPoint is located at: " + aPoint);
    aPoint.move(100, 50);
    bPoint.x = 110;
    bPoint.y = 70;
    aPoint.translate(10, 20);
    System.out.println("aPoint is now at: " + aPoint);
    if (aPoint.equals(bPoint))
      System.out.println("aPoint and bPoint are at the same location.");
  }
}





Point.x

 
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel implements KeyListener {
  private Point startPoint = new Point(0, 0);
  private Point endPoint = new Point(0, 0);
  public Main() {
    addKeyListener(this);
  }
  public void keyPressed(KeyEvent evt) {
    int keyCode = evt.getKeyCode();
    int d;
    if (evt.isShiftDown())
      d = 5;
    else
      d = 1;
    if (keyCode == KeyEvent.VK_LEFT)
      add(-d, 0);
    else if (keyCode == KeyEvent.VK_RIGHT)
      add(d, 0);
    else if (keyCode == KeyEvent.VK_UP)
      add(0, -d);
    else if (keyCode == KeyEvent.VK_DOWN)
      add(0, d);
  }
  public void keyReleased(KeyEvent evt) {
  }
  public void keyTyped(KeyEvent evt) {
  }
  public boolean isFocusTraversable() {
    return true;
  }
  public void add(int dx, int dy) {
    endPoint.x += dx;
    endPoint.y += dy;
    Graphics g = getGraphics();
    g.drawLine(startPoint.x, startPoint.y, endPoint.x, endPoint.y);
    g.dispose();
    startPoint.x = endPoint.x;
    startPoint.y = endPoint.y;
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setTitle("Sketch");
    frame.setSize(300, 200);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();
    contentPane.add(new Main());
    frame.setVisible(true);
  }
}





Point.y

 
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel implements KeyListener {
  private Point startPoint = new Point(0, 0);
  private Point endPoint = new Point(0, 0);
  public Main() {
    addKeyListener(this);
  }
  public void keyPressed(KeyEvent evt) {
    int keyCode = evt.getKeyCode();
    int d;
    if (evt.isShiftDown())
      d = 5;
    else
      d = 1;
    if (keyCode == KeyEvent.VK_LEFT)
      add(-d, 0);
    else if (keyCode == KeyEvent.VK_RIGHT)
      add(d, 0);
    else if (keyCode == KeyEvent.VK_UP)
      add(0, -d);
    else if (keyCode == KeyEvent.VK_DOWN)
      add(0, d);
  }
  public void keyReleased(KeyEvent evt) {
  }
  public void keyTyped(KeyEvent evt) {
  }
  public boolean isFocusTraversable() {
    return true;
  }
  public void add(int dx, int dy) {
    endPoint.x += dx;
    endPoint.y += dy;
    Graphics g = getGraphics();
    g.drawLine(startPoint.x, startPoint.y, endPoint.x, endPoint.y);
    g.dispose();
    startPoint.x = endPoint.x;
    startPoint.y = endPoint.y;
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setTitle("Sketch");
    frame.setSize(300, 200);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();
    contentPane.add(new Main());
    frame.setVisible(true);
  }
}


Источник — «http://jexp.ru/index.php?title=Java_by_API/java.awt/Point&oldid=1090»