Java Can'；不要将面板添加到布局中
我有一个扩展类JComponent的类，在这里我创建了一个带有图形的组件。我想用MigLayout在frame中添加这个类的对象，但组件并没有添加，我只能看到空的frame。谢谢你的帮助 使用图形创建组件的类Java Can'；不要将面板添加到布局中,java,swing,jcomponent,miglayout,preferredsize,Java,Swing,Jcomponent,Miglayout,Preferredsize,我有一个扩展类JComponent的类，在这里我创建了一个带有图形的组件。我想用MigLayout在frame中添加这个类的对象，但组件并没有添加，我只能看到空的frame。谢谢你的帮助 使用图形创建组件的类 public class DrawPictures extends JComponent { static { flagLeft = true; flagLeft = true; flagforfoot = true;
public class DrawPictures extends JComponent
{
static
{
flagLeft = true;
flagLeft = true;
flagforfoot = true;
}
public void setStringForMoveBall(String string)
{
stringForMoveBall = string;
}
public String getStringForMoveBall ()
{
return stringForMoveBall;
}
public DrawPictures()
{
changeColorBall = 0;
stringForMoveBall = "";
this.offset = 8;
marginBetweenRectangles = 70;
height = radiusWidth = 50;
top = radiusHeight = 30;
width = 60;
left = 20;
this.counter = 11;
rectangles = new LinkedList<RoundRectangle2D>();
ball = new Ellipse2D.Double( 400,570,top, top );
FullCollection(rectangles);
pusherFoot = new RoundRectangle2D.Double( 350, 600, 150, 50,radiusWidth,radiusHeight );
timerForBall = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e)
{
repaint();
}
} );
timerForBall.start();
}
private void DrawRectangles( Graphics2D drawer )
{
if( flagforfoot )
{
//flagforfoot = false;
for( int i = 0; i != rectangles.size(); ++i )
{
if ( i % 4 == 0)
{
drawer.setColor( Color.RED );
drawer.fill(rectangles.get(i));
}
else if ( i % 3 == 0)
{
drawer.setColor( Color.CYAN );
drawer.fill(rectangles.get(i));
}
else if ( i % 5 == 0)
{
drawer.setColor( Color.YELLOW );
drawer.fill(rectangles.get(i));
}
else if ( i % 7 == 0)
{
drawer.setColor( Color.WHITE );
drawer.fill(rectangles.get(i));
}
else if ( i % 8 == 0)
{
drawer.setColor( Color.MAGENTA );
drawer.fill(rectangles.get(i));
}
else if ( i % 9 == 0)
{
drawer.setColor( Color.GREEN );
drawer.fill(rectangles.get(i));
}
else
{
drawer.setColor( Color.PINK );
drawer.fill(rectangles.get(i));
}
}
}
}
@Override protected void paintComponent( Graphics graphics )
{
super.paintComponent(graphics);
drawer = (Graphics2D)graphics;
DrawRectangles(drawer);
drawer.setColor(Color.YELLOW);
drawer.fill(pusherFoot);
MoveFootRectangle(pusherFoot);
drawer.setColor(Color.GREEN);
drawer.fill(ball);
MoveBall( );
}
private void CheckHitBallWithRectangles( )
{
for( int i = rectangles.size() - 1; i > 0; --i )
{
if( ball.getMinY() >= rectangles.get(i).getMinY() &&
ball.getMinY() <= rectangles.get(i).getMaxY() &&
ball.getMaxX() >= rectangles.get(i).getMinX() &&
ball.getMaxX() <= rectangles.get(i).getMaxX() )
{
if ( CompareStringsForMoveBall("") )
{
stringForMoveBall = "DownAndLeftFromTopSide";
rectangles.remove(i);
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
//--i;
}
if( CompareStringsForMoveBall("UpAndRightFromLeftSide") )
{
stringForMoveBall = "DownAndRightFromTopSide";
rectangles.remove(i);
//--i;
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
}
}
if( ball.getMinY() >= rectangles.get(i).getMinY() &&
ball.getMinY() <= rectangles.get(i).getMaxY() &&
ball.getMinX() >= rectangles.get(i).getMinX() &&
ball.getMinX() <= rectangles.get(i).getMaxX())
{
if ( CompareStringsForMoveBall("") )
{
stringForMoveBall = "DownAndLeftFromTopSide";
rectangles.remove(i);
//--i;
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
}
}
if ( ball.getMaxY() >= rectangles.get(i).getMinY() &&
ball.getMaxY() <= rectangles.get(i).getMaxY() &&
ball.getMaxX() >= rectangles.get(i).getMinX() &&
ball.getMaxX() <= rectangles.get(i).getMaxX())
{
if( CompareStringsForMoveBall("DownAndRightFromTopSide") )
{
stringForMoveBall = "DownAndLeftFromTopSide";
rectangles.remove(i);
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
//--i;
}
if( CompareStringsForMoveBall("UpAndRightFromLeftSide") )
{
stringForMoveBall = "DownAndRightFromTopSide";
rectangles.remove(i);
//--i;
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
}
}
if ( ball.getMinX() >= rectangles.get(i).getMinX() &&
ball.getMinX() <= rectangles.get(i).getMaxX()&&
ball.getMinY() >= rectangles.get(i).getMinY() &&
ball.getMinY() <= rectangles.get(i).getMaxY())
{
rectangles.remove(i);
//--i;
rectangles.add(i,new RoundRectangle2D.Double(0,0,0,0,0,0));
}
//System.out.println(rectangles.size());
}
}
public void MoveFootRectangle(RoundRectangle2D pusher)
{
if( flagLeft && pusher.getX() >= 0)
{
pusher.setFrame(pusher.getX() - 30, pusher.getY(), 150, 60);
flagLeft = false;
}
if( flagRight && pusher.getX() <= 730 )
{
pusher.setFrame(pusher.getX() + 30, pusher.getY(), 150, 60);
flagRight = false;
}
}
public static void SetStatusFlagLeft( )
{
flagLeft = true;
}
public static void SetStatusFlagRight( )
{
flagRight = true;
}
private void MoveBallYLessNull( )
{
if( CompareStringsForMoveBall( "" ) )
{
stringForMoveBall = "DownAndLeftFromTopSide";
}
else if( CompareStringsForMoveBall( "UpAndRightFromLeftSide" ) )
{
stringForMoveBall = "DownAndRightFromTopSide";
}
}
private void MoveBallXLessNull( )
{
if ( CompareStringsForMoveBall( "DownAndLeftFromTopSide" ) )
{
stringForMoveBall = "DownAndRightFromTopSide";
}
else if( stringForMoveBall.compareTo( "" ) == 0 )
{
stringForMoveBall = "UpAndRightFromLeftSide";
}
}
private void MoveBall()
{
if ( CompareStringsForMoveBall( "" ) )
{
ball.setFrame(ball.getX() - offset, ball.getY() - offset, top, top);
}
if ( CompareStringsForMoveBall( "DownAndLeftFromTopSide" ) )
{
ball.setFrame(ball.getX() - offset, ball.getY() + offset, top, top);
}
if( ball.getX() < 0 )
{
MoveBallXLessNull();
}
if( ball.getY() < 0 )
{
MoveBallYLessNull();
}
if ( CompareStringsForMoveBall( "UpAndRightFromLeftSide" ) )
{
ball.setFrame(ball.getX() + offset, ball.getY() - offset, top, top );
}
if ( CompareStringsForMoveBall( "DownAndRightFromTopSide" ) )
{
ball.setFrame(ball.getX() + offset, ball.getY() + offset, top, top);
}
if ( ball.getMaxY() == pusherFoot.getMinY() &&
ball.getCenterX() > pusherFoot.getMinX()
&& ball.getCenterX() < pusherFoot.getMaxX() )
{
MoveBallHitWithFoot();
}
if( ball.getMaxX() > 880)
{
MoveBallForXMoreWidth();
}
CheckHitBallWithRectangles();
}
public void MoveBallForXMoreWidth( )
{
if ( CompareStringsForMoveBall( "DownAndRightFromTopSide" ) )
{
setStringForMoveBall("DownAndLeftFromTopSide");
}
else if( CompareStringsForMoveBall( "UpAndRightFromLeftSide" ) )
{
setStringForMoveBall("");
}
}
public void MoveBallHitWithFoot( )
{
if ( CompareStringsForMoveBall( "DownAndRightFromTopSide" ) )
{
setStringForMoveBall("UpAndRightFromLeftSide") ;
}
else if ( CompareStringsForMoveBall( "DownAndLeftFromTopSide" ) )
{
setStringForMoveBall("");
}
}
public boolean CompareStringsForMoveBall( String moveforball )
{
if ( (getStringForMoveBall()).compareTo(moveforball) == 0 )
{
return true;
}
else
{
return false;
}
}
private void FullCollection(LinkedList<RoundRectangle2D> newrectangles)
{
int counterTop = 0;
for( int i = 0; i <= counter; ++i )
{
newrectangles.add(new RoundRectangle2D.Double
( top + counterTop,left,width,height,radiusWidth,radiusHeight ));
counterTop += marginBetweenRectangles;
}
counterTop = 0;
for( int i = 0; i <= counter; ++i )
{
newrectangles.add(new RoundRectangle2D.Double
( top + counterTop,left + marginBetweenRectangles,width,height,radiusWidth,radiusHeight ));
counterTop += marginBetweenRectangles;
}
counterTop = 0;
for( int i = 0; i <= counter; ++i )
{
newrectangles.add(new RoundRectangle2D.Double
( top + counterTop,left + marginBetweenRectangles * 2,width,height,radiusWidth,radiusHeight ));
counterTop += marginBetweenRectangles;
}
}
private LinkedList<RoundRectangle2D> rectangles;
private Ellipse2D ball;
private int width,left,top,height, counter,radiusWidth,
radiusHeight,marginBetweenRectangles,offset,changeColorBall;
private RoundRectangle2D pusherFoot;
private Timer timerForBall;
private static boolean flagLeft,flagRight, flagforfoot;
private String stringForMoveBall;
private Graphics2D drawer;
}
public class MyGame {
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run()
{
FrameForGame frameForGame = new FrameForGame();
}
});
}
}
- 默认情况下，从不将适当的大小返回到容器
public class MyGame {
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run()
{
FrameForGame frameForGame = new FrameForGame();
}
});
}
}