import?java.awt.*;
import?java.awt.event.*;
import?javax.swing.*;

public?class?Casteljau?extends?frame?implements?WindowListenerComponentListenerMouseListenerActionListener
{//polygon?change
????private?double?t=0.0ts=0.0;
????private?double?px[][]=new?double[999][999];
????private?double?py[][]=new?double[999][999];
????private?int?i=0j=0kxysum=0;
????private?Button?button_Castebutton_Clearbutton_OK;
????private?int?flag1=0flag2=0flag3=0;
????private?Dialog?dialog;
????private?Label?label_dialoglabel;
????private?TextField?text;
????
	public?Casteljau（）
	{//initialize?windows
		super（“Bezier曲線的遞推（de?Casteljau）算法“）;
		this.setSize（800600）;
		this.setLocation（250100）;
		this.setLayout（new?FlowLayout（））;//windows?mediacy	
		this.setBackground（Color.lightGray）;
		
		button_Caste=new?Button（“Casteljau“）;
		this.add（button_Caste）;
		button_Caste.addActionListener（this）;
		
		button_Clear=new?Button（“Clear“）;
		this.add（button_Clear）;
		button_Clear.addActionListener（this）;
		
		dialog=new?Dialog（this“錯誤“true）;
		dialog.setSize（24080）;
		label_dialog=new?Label（“沒有給定位置矢量“Label.CENTER）;
		dialog.add（label_dialog）;
		dialog.addWindowListener（this）;
		
		label=new?Label（“求給定?t?坐標“）;
		this.add（label）;
		
		
		text=new?TextField（10）;
		text.setEditable（true）;
		this.add（text）;
		
		button_OK=new?Button（“OK“）;
		this.add（button_OK）;
		button_OK.addActionListener（this）;
		
		this.addComponentListener（this）;
		this.addWindowListener（this）;
		this.addMouseListener（this）;
		this.setVisible（true）;
		
		}
	
	public?void?paint（Graphics?g）{//draw?Axes
	??????????
	??
???????????if（flag1==1）
???????????{
????????????g.setColor（Color.blue）;
????????????g.fillOval（x-5y-51010）;
???????????}????????
????????????????????????????????
	}
	
	???public?void?update（Graphics?g）{//repaint?the?point
	???
	????????if（flag1==1）
	????????{
	????????g.setColor（Color.blue）;
????????????g.fillOval（x-4y-488）;
????????????}
????????????
????????????if（flag2==1）
	????????{????
????????????g.setColor（Color.red）;
????????????for（int?i=0;i????????????{g.drawLine（（int）px[i][0]（int）py[i][0]（int）px[i+1][0]（int）py[i+1][0]）;
????????????//time?delay
?????????????for（int?l=0;l<100000;l++）
		?	?for（int?t=0;t<4000;t++）
		?	???????{}
		?	??????}
		?	??????		?	??????
		?	??????t=0.0;
????????????while（t<=1.0）
????????????{????????????	
????????????for（k=0;k????????????for（i=0;i????????????{point（pxikt）;
?????????????point（pyikt）;}
?????????????g.setColor（Color.black）;???????????
?????????????g.fillOval（（int）px[0][sum-1]-1（int）py[0][sum-1]-122）;???????????
?????????????t=t+0.001;
????????????}
????????????}
????????????
????????????if（flag1==0&&flag2==0）
????????????{????g.setColor（Color.lightGray）;
????????????	g.fillRect（00800800）;
????????????	}
????????????	
????????????if（flag3==1）	
????????????{
????????????	ts=Doubl