一个十分好的java基础学习的课件

				import java.applet.*;
				import java.awt.*;
				public class Example1 extends Applet
				{   Button button1,button2;
				    int sum;
				    public void init( )
				    {   button1=new Button("Yes");
				        button2=new Button("No");
				        add(button1);
				        add(button2);
				    }
				    public void start( )
				    {   sum=0;
				        for(int i=1;i				            {   sum=sum+i;   }
				    }
				    public void stop( )
				    {    }
				    public void destroy( )
				    {    }
				    public void paint(Graphics g)
				    {   g.setColor(Color.blue);
				        g.drawString("程序设计方法",20,60);
				        g.setColor(Color.red);
				        g.drawString("sum=    "+sum,20,100);
				    }
				}