当用户使用java awt standalone（homework）移动滑块时，我试图更新圆圈的颜色。我必须使用Frame。我可以看到我的值从滑块更新，但是我可以将这些值放到paint方法中的内部类圆圈中进行重新绘制并更新圆形的颜色（目标） 谢谢你的帮助！！ 到目前为止，这是我的代码：
package cs111b;
import java.awt.*;
import java.awt.event.*;
public class ColorFactory extends Frame implements ActionListener, AdjustmentListener
{
private static final long serialVersionUID = 1L;
static Dimension t = Toolkit.getDefaultToolkit().getScreenSize();
Panel pS,cP,rB;
Scrollbar rScroll, gScroll, bScroll;
Checkbox hex, dec, oct,bin;
int[] Red = new int[4];
int[] Green = new int[4];
int[] Blue = new int[4];
int[] rgb = new int[3];
Color cl = new Color(rgb[0],rgb[1],rgb[2]);
Dimension Cr = new Dimension((int)(t.width*.70),(int)(t.height*.60));
int w = 300;
int x = (Cr.width/2)-(w/2);
int y = (Cr.height/2)-(w/2);
class Circle extends Canvas
{
private static final long serialVersionUID = 1L;
Dimension Cr = new Dimension((int)(t.width*.70),(int)(t.height*.60));
int w = 300;
int x = (Cr.width/2)-(w/2);
int y = (Cr.height/2)-(w/2);
//Color c;// = new Color(rgb[0],rgb[1],rgb[2]);
public Circle(int[] c)
{
cl = new Color(rgb[0],rgb[1],rgb[2]);
setSize(Cr);
}
@Override
public void paint(Graphics g)
{
super.paint(g);
//c = new Color(rgb[0],rgb[1],rgb[2]);
g.setColor(cl);
g.fillOval(x, y, w, w);
}
}
class Rect extends Canvas
{
private static final long serialVersionUID = 1L;
public Rect()
{
}
public Rect(int x,int y,int w, int h)
{
Red[0] = x;
Red[1] = y;
Red[2] = w;
Red[3] = h;
}
@Override
public void paint(Graphics g)
{
super.paint(g);
g.setColor(Color.WHITE);
g.fillRect(Red[0], Red[1], Red[2], Red[3]);
g.setColor(Color.GREEN);
g.fillRect(Green[0], Green[1], Green[2], Green[3]);
g.setColor(Color.BLUE);
g.fillRect(Blue[0], Blue[1], Blue[2], Blue[3]);
}
}
public ColorFactory()
{
addWindowListener( new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
setSize(t);
setTitle("Color Factory");
setLayout(new FlowLayout());
//*****************Creating Label
Label l = new Label("Color Factory");
l.setAlignment(Label.CENTER);
l.setPreferredSize(new Dimension(t.width,(int)(t.height*.1)));
l.setFont(new Font("Seriff",Font.BOLD,35));
l.setForeground(Color.ORANGE);
add(l);
//******************Creating Scrolls
rScroll = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
gScroll = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
bScroll = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,255);
rScroll.setPreferredSize(new Dimension(255,20));
gScroll.setPreferredSize(new Dimension(255,20));
bScroll.setPreferredSize(new Dimension(255,20));
//******************Creating Panel
pS = new Panel();
pS.setPreferredSize(new Dimension(t.width, (int)(t.height*.10)));
pS.setBackground(Color.BLUE);
//rScroll.setPreferredSize(new Dimension((int)(this.getWidth()*.2),(int)(this.getHeight()*.02)));
rScroll.setBackground(Color.WHITE);
gScroll.setBackground(Color.WHITE);
bScroll.setBackground(Color.WHITE);
rgb[0]= rScroll.getValue();
rgb[1]= gScroll.getValue();
rgb[2]= bScroll.getValue();
pS.add(rScroll);
pS.add(gScroll);
pS.add(bScroll);
add(pS);
//Creating Circle
cP = new Panel();
cP.setBackground(Color.BLUE);
cP.setPreferredSize(new Dimension((int)(t.width*.70), (int)(t.height*.60)));
Circle C = new Circle(rgb);
C.setBackground(Color.DARK_GRAY);
//C.setForeground(Color.cyan);
C.setPreferredSize(new Dimension((int)(t.width*.70), (int)(t.height*.60)));
cP.add(C);
add(cP);
//creating radio buttons panel
rB = new Panel();
rB.setPreferredSize(new Dimension((int)(t.width*.27), (int)(t.height*.60)));
rB.setBackground(Color.RED);
//Creating CheckBoxes
CheckboxGroup cg = new CheckboxGroup();
hex = new Checkbox("Hex",cg,true);
dec = new Checkbox("Dec",cg,true);
oct = new Checkbox("Oct",cg,true);
bin = new Checkbox("Bin",cg,true);
rB.add(hex);
rB.add(dec);
rB.add(oct);
rB.add(bin);
//creating Rectangles
Red[0] = (int)(rB.getWidth()*.20);Red[1]= (int)(rB.getHeight()*8);Red[2] = 20; Red[3]= rScroll.getValue();
Green[0] = (int)(rB.getWidth()*.20)+40;Green[1]= (int)(rB.getHeight()*8);Green[2] = 20; Red[3]= rScroll.getValue();
Blue[0] = (int)(rB.getWidth()*.20)+80;Blue[1]= (int)(rB.getHeight()*8);Blue[2] = 20; Blue[3]= rScroll.getValue();
Rect r = new Rect();
r.setSize(this.getWidth(), this.getHeight());
rB.add(r);
add(rB);
rScroll.addAdjustmentListener(this);
gScroll.addAdjustmentListener(this);
bScroll.addAdjustmentListener(this);
setVisible(true);
}
/*
public void paint(Graphics g)
{
super.paint(g);
//g.setXORMode(cl);
g.setColor(cl);
g.fillOval(x, y, w, w);
}
*/
public static void main(String[] args)
{
new ColorFactory();
}
@Override
public void actionPerformed(ActionEvent e)
{
}
@Override
public void adjustmentValueChanged(AdjustmentEvent e)
{
if(rScroll.getValueIsAdjusting())
{
Red[3]= e.getValue();
rgb[0]= e.getValue();
cP.setForeground(new Color(rgb[0],rgb[1],rgb[2]));
cP.repaint();
}
if(gScroll.getValueIsAdjusting())
{
rgb[1] = e.getValue();
cP.repaint();
}
if(bScroll.getValueIsAdjusting())
{
rgb[2] = e.getValue();
cP.repaint();
}
rB.repaint();
}
}