자바 에플릿으로 만든 그림판인데
버튼은 제대로 나오는데 캔버스가 엉망이고 액션소스에도 문제가 있는것 같아
고수횽들 좀 도와줘 ㅜㅜ

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class PaintTest extends java.applet.Applet
{
 Button buttonLine;
 Button buttonRect;
 Button buttonOval;
 Panel canvas;
 Button buttonRed;
 Button buttonBlue;
 Button buttonYellow;
 Button buttonGreen;
 Button buttonWhite;
 Button buttonBlack;

 int DRAW=0;

 Point p1,p2;   //좌료얻기위한 변수
 Graphics g;  //그리기수행하는 변수

 static Color color;

 public void init()
 {
  buttonLine = new Button("선");   //버튼생성
  add(buttonLine);
  buttonLine.setBounds(10, 10, 75, 30);   //버튼위치 지정
  

  buttonOval = new Button("원");
  add(buttonOval);
  buttonOval.setBounds(10, 50, 75, 30);

  buttonRect = new Button("사각형");
  add(buttonRect);
  buttonRect.setBounds(10, 90, 75, 30);

  buttonRed = new Button("Red");
  add(buttonRed);
  buttonRed.setBounds(10, 150, 30, 30);
  buttonRed.setBackground(Color.red);

  buttonBlue = new Button("Blue");
  add(buttonBlue);
  buttonBlue.setBounds(50, 150, 30, 30);
  buttonBlue.setBackground(Color.blue);
  
  buttonYellow = new Button("Yellow");
  add(buttonYellow);
  buttonYellow.setBounds(10, 190, 30, 30);
  buttonYellow.setBackground(Color.yellow);
  
  buttonGreen = new Button("Green");
  add(buttonGreen);
  buttonGreen.setBounds(50, 190, 30, 30);
  buttonGreen.setBackground(Color.green);
  
  buttonWhite = new Button("White");
  add(buttonWhite);
  buttonWhite.setBounds(10, 230, 30, 30);
  buttonWhite.setBackground(Color.white);
  
  buttonBlack = new Button("Black");
  add(buttonBlack);
  buttonBlack.setBounds(50, 230, 30, 30);
  buttonBlack.setBackground(Color.black);

  canvas = new Panel();
  canvas.setBounds(90,0,410,800);
  canvas.setBackground(Color.green);
  add(canvas);
 }
 
 public void drawLine(Color color)   //선그리기
  {
   g = canvas.getGraphics();
   g.setColor(color);
   g.drawLine((int)p1.getX(),(int)p1.getY(),(int)p2.getX(),(int)p2.getY());
  }
 
 public void drawRect(Color color)  //사각형그리기
  {
   g = canvas.getGraphics();
   g.setColor(color);
   g.drawRect((int)p1.getX(),(int)p1.getY(),(int)p2.getX()-(int)p1.getX(),(int)p2.getY()-(int)p1.getY());
  }
 
 public void drawOval(Color color)   //원그리기
 {
  g = canvas.getGraphics();
  g.setColor(color);
  g.drawOval((int)p1.getX(),(int)p1.getY(),(int)p2.getX()-(int)p1.getX(),(int)p2.getY()-(int)p1.getY());
 }
 
 public void mouseClicked(MouseEvent e) {} 
 public void mouseEntered(MouseEvent e) {}

 public void mouseExited(MouseEvent e) {}

 public void mousePressed(MouseEvent e)
 {
  p1=e.getPoint();
 }
 
 public void mouseReleased(MouseEvent e)
 {
  p2=e.getPoint();
  
  switch(DRAW)
    {
     case 1:drawLine(color);break;
     case 2:drawRect(color);break;
     case 3:drawOval(color);break;
    }
 }

/* public void actionPerformed(ActionEvent e)  //ActionListener 구현
 {
  if (e.getActionCommand().equals("선")) //선 버튼일 경우
  {
   DRAW=1;
  } else if (e.getActionCommand().equals("사각형")) //사각형 버튼일 경우
  {
   DRAW=2;
  } else if (e.getActionCommand().equals("원")) //원 버튼일 경우
  {
   DRAW=3;
     }

  if(e.getActionCommand().equals("Red"))
  {
   color = Color.red;
  } else if(e.getActionCommand().equals("Blue"))
  {
   color = Color.blue;
     } else if(e.getActionCommand().equals("Yellow"))
  {
   color = Color.yellow;
  } else if(e.getActionCommand().equals("Green"))
  {
   color = Color.green;
  } else if(e.getActionCommand().equals("White"))
  {
   color = Color.white;
  } else if(e.getActionCommand().equals("Black"))
  {
   color = Color.black;
  }
 }*/
}