jFrameにたくさんのGraphics2Dを表示するには？

Question

私はjFrame（解像度：300x300）を持っており、楕円をたくさん表示したいと思っています。そのフィールド解像度は4000x4000でなければなりません。それ、どうやったら出来るの？楕円のフィールドの場合は、jComponentを作成して500楕円をすべて表示します。

jComponentの一部だけ表示されることがわかります。jComponentのサイズを変更してすべての省略記号を表示する方法はありますか？

楕円/ JComponentの

package home; 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.geom.Ellipse2D; 
import java.util.ArrayList; 
import java.util.Random; 

import javax.swing.JComponent; 

public class Karte extends JComponent { 

    private static final long serialVersionUID = 1L; 
    int AMOUNT= 500; 
    public ArrayList<Ellipse2D> Kreise = new ArrayList<Ellipse2D>(); 

    public Karte() { 
     createCircles(AMOUNT); 
    } 

    private void createCircles(int AMOUNT) { 
     Random r = new Random(); 
     for (int i = 1; i <= AMOUNT; i++) { 
      Kreise.add(new Ellipse2D.Double(r.nextInt(4000), r.nextInt(4000), 4, 4)); 
     } 

    } 

    @Override 
    protected void paintComponent(Graphics g) { 


     Graphics2D kreis = (Graphics2D) g;  

     for (Ellipse2D t : Kreise) { 

      kreis.setColor(Color.BLACK); 
      kreis.draw(t); 

     } 

    } 
} 

の

http://i.stack.imgur.com/75QA9.png

その私の地域ANSこれはあなたが、JPanelにこのJPanelプットをごJComponentsを入れて持っている私のGUI

package home; 

import java.awt.Dimension; 
import java.awt.geom.Ellipse2D; 
import java.util.ArrayList; 

public class NewJFrame extends javax.swing.JFrame { 

    private static final long serialVersionUID = 1L; 

    public NewJFrame() { 
     initComponents(); 

    } 

    private void initComponents() { 

     jLayeredPane1 = new javax.swing.JLayeredPane(); 
     karte1 = new home.Karte(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     javax.swing.GroupLayout karte1Layout = new javax.swing.GroupLayout(karte1); 
     karte1.setLayout(karte1Layout); 
     karte1Layout.setHorizontalGroup(karte1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER).addGap(0, 4000, Short.MAX_VALUE)); 
     karte1Layout.setVerticalGroup(karte1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER).addGap(0, 4000, Short.MAX_VALUE)); 

     karte1.setBounds(0, 0, 4000, 4000); 
     karte1.setMinimumSize(new Dimension(300, 300)); 
     jLayeredPane1.add(karte1, javax.swing.JLayeredPane.DEFAULT_LAYER); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(jLayeredPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, 
       Short.MAX_VALUE)); 
     layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(jLayeredPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, 
       Short.MAX_VALUE)); 

     pack(); 
    } 

    public static void main(String args[]) { 

     try { 
      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
       if ("Windows".equals(info.getName())) { 
        javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (InstantiationException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (IllegalAccessException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 

     java.awt.EventQueue.invokeLater(new Runnable() { 

      public void run() { 
       new NewJFrame().setVisible(true); 
      } 
     }); 
    } 

    private javax.swing.JLayeredPane jLayeredPane1; 
    private home.Karte karte1; 

} 

Answer 1

ですJScrollPane

EDIT：

：

@PeterGriffinは、多分あなたはBufferedImageにごCustom Paintを作成するには、この画像は、例えばJComponentまたはIcon/ImageIcon

JLabelのように置く jScrollPane is nice, but i want to display all ellipes in this jFrame. That means the area (500 ellipses) should be scaled down to 300x300.

を書きました

コードから：

import java.awt.*; 
import java.awt.event.*; 
import java.util.*; 
import javax.swing.*; 
import javax.swing.SwingUtilities; 
import javax.swing.Timer; 
//http://stackoverflow.com/questions/3256269/jtextfields-on-top-of-active-drawing-on-jpanel-threading-problems/3256941#3256941 
public class AnimationBackground { 

    public AnimationBackground() { 
     Random random = new Random(); 
     JFrame frame = new JFrame("Animation Background"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setResizable(false); 
     frame.setLayout(new GridLayout(0, 1, 10, 10)); 
     JPanel fatherPanel = new JPanel(); 
     fatherPanel.setLayout(new GridLayout(0, 3, 10, 10)); 
     for (int iPanels = 0; iPanels < 3; iPanels++) { 
      final MyJPanel panel = new MyJPanel(); 
      panel.setBackground(Color.BLACK); 
      for (int i = 0; i < 100; i++) { 
       Star star = new Star(new Point(random.nextInt(490), random.nextInt(490))); 
       star.setColor(new Color(100 + random.nextInt(155), 100 + random.nextInt(155), 100 + random.nextInt(155))); 
       star.setxIncr(-3 + random.nextInt(7)); 
       star.setyIncr(-3 + random.nextInt(7)); 
       panel.add(star); 
      } 
      panel.setLayout(new GridLayout(10, 1)); 
      JLabel label = new JLabel("This is a Starry background.", JLabel.CENTER); 
      label.setForeground(Color.WHITE); 
      panel.add(label); 
      JPanel stopPanel = new JPanel(); 
      stopPanel.setOpaque(false); 
      stopPanel.add(new JButton(new AbstractAction("Stop this madness!!") { 

       private static final long serialVersionUID = 1L; 

       @Override 
       public void actionPerformed(ActionEvent e) { 
        panel.stopAnimation(); 
       } 
      })); 
      panel.add(stopPanel); 
      JPanel startPanel = new JPanel(); 
      startPanel.setOpaque(false); 
      startPanel.add(new JButton(new AbstractAction("Start moving...") { 

       private static final long serialVersionUID = 1L; 

       @Override 
       public void actionPerformed(ActionEvent e) { 
        panel.startAnimation(); 
       } 
      })); 
      panel.add(startPanel); 
      fatherPanel.add(panel); 
     } 
     JScrollPane scrollPane = new JScrollPane(fatherPanel); 
     frame.add(scrollPane, BorderLayout.CENTER); 
     frame.setSize(400, 300); 
     frame.setLocation(150, 150); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       AnimationBackground animationBackground = new AnimationBackground(); 
      } 
     }); 
    } 

    class Star extends Polygon { 

     private static final long serialVersionUID = 1L; 
     private Point location = null; 
     private Color color = Color.YELLOW; 
     private int xIncr, yIncr; 
     static final int WIDTH = 500, HEIGHT = 500; 

     Star(Point location) { 
      int x = location.x; 
      int y = location.y; 
      this.location = location; 
      this.addPoint(x, y + 8); 
      this.addPoint(x + 8, y + 8); 
      this.addPoint(x + 11, y); 
      this.addPoint(x + 14, y + 8); 
      this.addPoint(x + 22, y + 8); 
      this.addPoint(x + 17, y + 12); 
      this.addPoint(x + 21, y + 20); 
      this.addPoint(x + 11, y + 14); 
      this.addPoint(x + 3, y + 20); 
      this.addPoint(x + 6, y + 12); 
     } 

     public void setColor(Color color) { 
      this.color = color; 
     } 

     public void move() { 
      if (location.x < 0 || location.x > WIDTH) { 
       xIncr = -xIncr; 
      } 
      if (location.y < 0 || location.y > WIDTH) { 
       yIncr = -yIncr; 
      } 
      translate(xIncr, yIncr); 
      location.setLocation(location.x + xIncr, location.y + yIncr); 
     } 

     public void setxIncr(int xIncr) { 
      this.xIncr = xIncr; 
     } 

     public void setyIncr(int yIncr) { 
      this.yIncr = yIncr; 
     } 

     public Color getColor() { 
      return color; 
     } 
    } 

    class MyJPanel extends JPanel { 

     private static final long serialVersionUID = 1L; 
     private ArrayList<Star> stars = new ArrayList<Star>(); 
     private Timer timer = new Timer(20, new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       for (Star star : stars) { 
        star.move(); 
       } 
       repaint(); 
      } 
     }); 

     public void stopAnimation() { 
      if (timer.isRunning()) { 
       timer.stop(); 
      } 
     } 

     public void startAnimation() { 
      if (!timer.isRunning()) { 
       timer.start(); 
      } 
     } 

     @Override 
     public void addNotify() { 
      super.addNotify(); 
      timer.start(); 
     } 

     @Override 
     public void removeNotify() { 
      super.removeNotify(); 
      timer.stop(); 
     } 

     MyJPanel() { 
      this.setPreferredSize(new Dimension(520, 520)); 
     } 

     public void add(Star star) { 
      stars.add(star); 
     } 

     @Override 
     public void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); 
      for (Star star : stars) { 
       g.setColor(star.getColor()); 
       g.fillPolygon(star); 
      } 
     } 
    } 
} 

Answer 2

スケール（...）を使用してGraphics2Dにキャストできます。メソッドに300/4000を渡します（またはあなたが望むサイズと実際のサイズにします）。