paint flashing java

Question

1.再描画中にウィンドウが点滅しています。どうすればそれを排除できますか？ updateメソッドを使用しても動作しません。 2. NetBeansで最新ではないクラスをすべて更新するにはどうすればよいですか？私のネットビーンズは古いクラス（jdk 7より前）を使っているようです。

import java.awt.Frame; 
import java.awt.Graphics; 
import java.awt.GraphicsConfiguration; 
import java.awt.*; 
import java.awt.event.ActionListener; 
import java.util.Timer; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.JWindow; 


public class Splash extends JWindow { 

    private boolean mIsRunning; 
    private boolean mIsFadingOut; 
    volatile static boolean s = true; 
    private int mAngle; 
    private int mFadeCount; 
    private int mFadeLimit = 15; 

    Splash(Frame f) { 
     super(f); 
    } 

    public void startt() { 
     while (s) { 
      repaint(); 

      mAngle += 3; 
      if (mAngle >= 360) { 
       mAngle = 0; 
      } 
      if (mIsFadingOut) { 
       if (--mFadeCount == 0) { 
        mIsRunning = false; 
       } 
      } else if (mFadeCount < mFadeLimit) { 
       mFadeCount++; 
      } 
      try { 
       Thread.sleep(100); 
      } catch (InterruptedException ex) { 
       Logger.getLogger(Splash.class.getName()).log(Level.SEVERE, null, ex); 
      } 
     } 
    } 

    public void paint(Graphics g) { 
     int w = getWidth(); 
     int h = getHeight(); 

     // Paint the view. 
     super.paintComponents(g); 
     Graphics2D g2 = (Graphics2D) g.create(); 
     float fade = (float) mFadeCount/(float) mFadeLimit; 
     // Gray it out. 
     Composite urComposite = g2.getComposite(); 
     g2.setComposite(AlphaComposite.getInstance(
       AlphaComposite.SRC_OVER, .5f * fade)); 
     g2.fillRect(0, 0, w, h); 
     g2.setComposite(urComposite); 

     // Paint the wait indicator. 
     int s = Math.min(w, h)/5; 
     int cx = w/2; 
     int cy = h/2; 
     g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
       RenderingHints.VALUE_ANTIALIAS_ON); 
     g2.setStroke(
       new BasicStroke(s/4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); 
     g2.setPaint(Color.white); 
     g2.rotate(Math.PI * mAngle/180, cx, cy); 
     for (int i = 0; i < 12; i++) { 
      float scale = (11.0f - (float) i)/11.0f; 
      g2.drawLine(cx + s, cy, cx + s * 2, cy); 
      g2.rotate(-Math.PI/6, cx, cy); 
      g2.setComposite(AlphaComposite.getInstance(
        AlphaComposite.SRC_OVER, scale * fade)); 
     } 

     g2.dispose(); 
    } 
} 

public void showSplash(){ 
    final JFrame p = this; //parent 
    final Rectangle s = this.getBounds(); //parent size 

    new Thread(){ 
     public void run(){ 
      splash = new Splash(p); 
      splash.setBounds(s); 
      splash.setVisible(true); 
      splash.startt(); 
     } 
    }.start(); 
} 

}

Answer 1

この問題は、JWindowのペイントメソッドをオーバーライドするという問題が原因です。 JPanelのpaintComponent()をオーバーライドする代わりに、ダブルバッファリングを使用します。

import java.awt.AlphaComposite; 
import java.awt.BasicStroke; 
import java.awt.Color; 
import java.awt.Composite; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.RenderingHints; 
import java.util.logging.Level; 
import java.util.logging.Logger; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JWindow; 
import javax.swing.SwingUtilities; 

public class Test extends JFrame { 

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

      @Override 
      public void run() { 
       JWindow window = new JWindow(); 
       final Splash splash = new Splash(); 
       window.add(splash); 
       window.setSize(100, 30); 
       window.setVisible(true); 

       new Thread() { 

        @Override 
        public void run() { 
         splash.startt(); 
        } 
       }.start(); 
      } 
     }); 
    } 

    public static class Splash extends JPanel { 

     private boolean mIsRunning; 
     private boolean mIsFadingOut; 
     volatile static boolean s = true; 
     private int mAngle; 
     private int mFadeCount; 
     private int mFadeLimit = 30; 

     Splash() { 
     } 

     @Override 
     protected void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      int w = getWidth(); 
      int h = getHeight(); 

      // Paint the view. 
      super.paintComponents(g); 
      Graphics2D g2 = (Graphics2D) g.create(); 
      float fade = (float) mFadeCount/(float) mFadeLimit; 
      // Gray it out. 
      Composite urComposite = g2.getComposite(); 
      g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .5f * fade)); 
      g2.fillRect(0, 0, w, h); 
      g2.setComposite(urComposite); 

      // Paint the wait indicator. 
      int s = Math.min(w, h)/5; 
      int cx = w/2; 
      int cy = h/2; 
      g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); 
      g2.setStroke(new BasicStroke(s/4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); 
      g2.setPaint(Color.white); 
      g2.rotate(Math.PI * mAngle/180, cx, cy); 
      for (int i = 0; i < 12; i++) { 
       float scale = (11.0f - i)/11.0f; 
       g2.drawLine(cx + s, cy, cx + s * 2, cy); 
       g2.rotate(-Math.PI/6, cx, cy); 
       g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, scale * fade)); 
      } 

      g2.dispose(); 
     } 

     public void startt() { 
      while (s) { 

       mAngle += 3; 
       if (mAngle >= 360) { 
        mAngle = 0; 
       } 
       if (mIsFadingOut) { 
        if (--mFadeCount == 0) { 
         mIsRunning = false; 
        } 
       } else if (mFadeCount < mFadeLimit) { 
        mFadeCount++; 
       } 
       repaint(); 
       try { 
        Thread.sleep(100); 
       } catch (InterruptedException ex) { 
        Logger.getLogger(Splash.class.getName()).log(Level.SEVERE, null, ex); 
       } 
      } 
     } 

    } 

} 

Answer 2

EDT上Thread.sleep(...)を呼び出すのではなく、例えば、ショーのようなスイングタイマーを使用しないでください。また、Swingのデフォルトのダブルバッファリングを使用するためにJWindowが保持するJPanelのメソッドpaintComponent(...)を描画する必要があります。