java畫(huà)圖的程序

import java.awt.*;

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import javax.swing.*;

public class TankWar extends JFrame {

public TankWar (String title) {

super(title);

this.setSize(600,500);

this.setLocationRelativeTo(null); //設(shè)置窗口的位置屏幕中間

this.setResizable(false); //設(shè)置為不可改變大小

this.setDefaultCloseOperation(EXIT_ON_CLOSE); //設(shè)置關(guān)閉事件

MyJPanel myJPanel = new MyJPanel(); //創(chuàng)建一個(gè)MyJPanel實(shí)例對(duì)象myJPanel

myJPanel.setBackground(Color.blue);//設(shè)置myJPanel的背景顏色

this.add(myJPanel);

this.setVisible(true);

}

/*內(nèi)部繼承JPanel類*/

class MyJPanel extends JPanel {

protected void paintComponent(Graphics g) {

g.setClip(30,30,300,300);

Color c = g.getColor();

g.setColor(Color.red);

g.fillOval(200, 100, 300, 300);

g.setColor(c);

}

}

public static void main(String args[]){

new TankWar ("坦克大戰(zhàn)");

}

}

JAVA編譯簡(jiǎn)易畫(huà)圖板代碼

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//畫(huà)筆大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具標(biāo)記

//toolFlag工具對(duì)應(yīng)表：

//（0--畫(huà)筆）；（1--橡皮）；（2--清除）；

//（3--直線）；（4--圓）；（5--矩形）；

Color c = new Color(0,0,0); //畫(huà)筆顏色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//畫(huà)筆粗細(xì)

Point cutflag = new Point(-1, -1, c, 6, con);//截?cái)鄻?biāo)志

Vector paintInfo = null;//點(diǎn)信息向量組

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--畫(huà)筆，直線，圓，矩形，多邊形,橡皮，清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 顏色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按鈕及選擇項(xiàng)*/

//顏色選擇

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//畫(huà)筆大小選擇

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小選擇

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("畫(huà)筆");

drLine = new Button("畫(huà)直線");

drCircle = new Button("畫(huà)圓形");

drRect = new Button("畫(huà)矩形");

openPic = new Button("打開(kāi)圖畫(huà)");

savePic = new Button("保存圖畫(huà)");

colchooser = new Button("顯示調(diào)色板");

//各組件事件監(jiān)聽(tīng)

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

顏色 = new Label("畫(huà)筆顏色",Label.CENTER);

大小B = new Label("畫(huà)筆大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加組件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(顏色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打開(kāi)圖畫(huà)",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存圖畫(huà)",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

for(int i=0; in ;i++){

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://畫(huà)筆

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://畫(huà)直線

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://畫(huà)圓

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://畫(huà)矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截?cái)?，跳過(guò)

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//預(yù)選顏色

{

String name = ColChoice.getSelectedItem();

if(name=="black")

{c = new Color(0,0,0); }

else if(name=="red")

{c = new Color(255,0,0);}

else if(name=="green")

{c = new Color(0,255,0);}

else if(name=="blue")

{c = new Color(0,0,255);}

}

else if(e.getSource()==SizeChoice)//畫(huà)筆大小

{

String selected = SizeChoice.getSelectedItem();

if(selected=="1")

{

con = 1;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="3")

{

con = 3;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="5")

{con = 5;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="7")

{con = 7;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="9")

{con = 9;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

}

else if(e.getSource()==EraserChoice)//橡皮大小

{

String Esize = EraserChoice.getSelectedItem();

if(Esize=="5")

{ Econ = 5*2; }

else if(Esize=="9")

{ Econ = 9*2; }

else if(Esize=="13")

{ Econ = 13*2; }

else if(Esize=="17")

{ Econ = 17*3; }

}

}

public void mouseDragged(MouseEvent e)

{

Point p1 ;

switch(toolFlag){

case 0://畫(huà)筆

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p1);

repaint();

break;

case 1://橡皮

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, null, toolFlag, Econ);

paintInfo.addElement(p1);

repaint();

break;

default :

}

}

public void mouseMoved(MouseEvent e) {}

public void update(Graphics g)

{

paint(g);

}

public void mousePressed(MouseEvent e)

{

Point p2;

switch(toolFlag){

case 3://直線

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 4: //圓

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

default :

}

}

public void mouseReleased(MouseEvent e)

{

Point p3;

switch(toolFlag){

case 0://畫(huà)筆

paintInfo.addElement(cutflag);

break;

case 1: //eraser

paintInfo.addElement(cutflag);

break;

case 3://直線

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 4: //圓

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

default:

}

}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

public void mouseClicked(MouseEvent e){}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==pen)//畫(huà)筆

{toolFlag = 0;}

if(e.getSource()==eraser)//橡皮

{toolFlag = 1;}

if(e.getSource()==clear)//清除

{

toolFlag = 2;

paintInfo.removeAllElements();

repaint();

}

if(e.getSource()==drLine)//畫(huà)線

{toolFlag = 3;}

if(e.getSource()==drCircle)//畫(huà)圓

{toolFlag = 4;}

if(e.getSource()==drRect)//畫(huà)矩形

{toolFlag = 5;}

if(e.getSource()==colchooser)//調(diào)色板

{

Color newColor = JColorChooser.showDialog(this,"調(diào)色板",c);

c = newColor;

}

if(e.getSource()==openPic)//打開(kāi)圖畫(huà)

{

openPicture.setVisible(true);

if(openPicture.getFile()!=null)

{

int tempflag;

tempflag = toolFlag;

toolFlag = 2 ;

repaint();

try{

paintInfo.removeAllElements();

File filein = new File(openPicture.getDirectory(),openPicture.getFile());

picIn = new FileInputStream(filein);

VIn = new ObjectInputStream(picIn);

paintInfo = (Vector)VIn.readObject();

VIn.close();

repaint();

toolFlag = tempflag;

}

catch(ClassNotFoundException IOe2)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read object");

}

catch(IOException IOe)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read file");

}

}

}

if(e.getSource()==savePic)//保存圖畫(huà)

{

savePicture.setVisible(true);

try{

File fileout = new File(savePicture.getDirectory(),savePicture.getFile());

picOut = new FileOutputStream(fileout);

VOut = new ObjectOutputStream(picOut);

VOut.writeObject(paintInfo);

VOut.close();

}

catch(IOException IOe)

{

System.out.println("can not write object");

}

}

}

}//end paintboard

public class pb

{

public static void main(String args[])

{ new paintboard("畫(huà)圖程序"); }

}

用Java一個(gè)簡(jiǎn)單的畫(huà)圖程序

下面是我以前做的小程序，希望能給你點(diǎn)幫助！

package menu;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class DaYin extends JFrame implements ActionListener{

public DaYin() {

Container c=this.getContentPane();

c.setLayout(new BorderLayout());

JMenuBar jmb=new JMenuBar();

JMenu jm=null;

jm=new JMenu("文件");

jmb.add(jm);

jm=new JMenu("編輯");

jmb.add(jm);

jm=new JMenu("打印");

JMenuItem jmi=new JMenuItem("打印預(yù)覽");

jmi.addActionListener(this);

jm.add(jmi);

jmb.add(jm);

jm=new JMenu("幫助");

jmb.add(jm);

this.setJMenuBar(jmb);

this.setSize(1024,768);

this.setVisible(true);

this.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

});

}

public static void main(String[] args) {

new DaYin();

}

public void update(Graphics g){

g.setColor(Color.black);

String title[]={"摘要","科目","子目或戶名","借方金額","貸方金額"};

String danwei[]={"千","百","十","萬(wàn)","千","百","十","元","角","分"};

int csx=200;//打印x的初始坐標(biāo)

int csy=200;//打印y的初始坐標(biāo)

int x=csx;

int y=csy;

int a=x+20;//打印字體x的初始坐標(biāo)

int b=y+20;//打印字體y的初始坐標(biāo)

int row=7;//一共打印出幾條橫線

int cul=5;//一共打印出幾條豎線

int hangju=30;//線與線之間的縱向間距

int lieju=100;//線與線之間的橫向間距

int yy=hangju*row+y;

int c=yy+20;

g.setFont(new Font("行楷",Font.TYPE1_FONT,24));

g.drawString("記 賬 憑 證", x+160, y-40);//打印出記賬憑證這幾個(gè)字

g.drawLine(x+100, y-30, x+340, y-30);//打印出記賬憑證下面的那條線

g.setFont(new Font("行楷",Font.TYPE1_FONT,13));

g.drawString("年 月 日 第_______號(hào)", x+260, y-10);

//g.drawLine(x+430, y-10, x+470, y-10);

for(int i=0;i=row;i++){

g.drawLine(x, y, cul*lieju+x+25, y);//此循環(huán)用于畫(huà)出表格的行

if(i==0)

y+=hangju*2;

else

y+=hangju;

}

y=csy;

g.drawLine(x+lieju*3, y+hangju, cul*lieju+x, y+hangju);//打印出第一行半的橫線

for(int j=0;j=cul;j++){

g.drawLine(x, y, x, row*hangju+y);//此循環(huán)用于畫(huà)出表格的列

x+=lieju;

}

x=csx;

for(int z=0;zcul;z++){

g.setColor(Color.red);//設(shè)置顏色

g.setFont(new Font("",Font.TYPE1_FONT,13));//設(shè)置表頭字體

if(z3)

g.drawString(title[z], a, b+hangju/2);

else

g.drawString(title[z], a, b);//為表格添加表頭

a+=lieju;

}//76-89打印出一個(gè)表格形狀

int xx=lieju*3+x+10;

for(int v=0;v=9;v++){

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循環(huán)用于畫(huà)出表格的列

g.setFont(new Font("",Font.TYPE1_FONT,11));

g.drawString(danwei[v], xx-10, y+hangju+20);//為表格添加表頭

if(v%2==0)

g.setColor(Color.red);//設(shè)置顏色

else

g.setColor(Color.BLUE);//設(shè)置顏色

xx+=10;

}

for(int n=0;n9;n++){

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循環(huán)用于畫(huà)出表格的列

g.drawString(danwei[n],xx-10, y+hangju+20);//為表格添加表頭

if(n%2==0)

g.setColor(Color.red);//設(shè)置顏色

else

g.setColor(Color.BLUE);//設(shè)置顏色

xx+=10;

}

g.drawString(danwei[9],xx-10, y+hangju+20);

g.setColor(Color.black);//設(shè)置顏色

for(int i=0;i=1;i++){

g.drawLine(x,yy , cul*lieju+x, yy);//此循環(huán)用于畫(huà)出表格的行

yy+=hangju;

}

yy=hangju*row+y;

for(int j=0;j=3;j++){

g.drawLine(x, yy, x, (row+1)*hangju+y);//此循環(huán)用于畫(huà)出表格的列

if(j0){

x+=lieju;

}else{

x+=lieju*3;

}

}//112-128打印出表格的最后一行單元格

x=csx;

g.setFont(new Font("",Font.TYPE1_FONT,13));

g.drawString("合 計(jì)",x+60, c);

g.drawString("會(huì)計(jì)主管 記賬 出納 審核 制證", x+30, yy+50);

g.drawLine(cul*lieju+x+25, y, cul*lieju+x+25, (row+1)*hangju+y);//打印出最后一列

g.drawString("記",cul*lieju+x+6, y+15);

g.drawString("賬", cul*lieju+x+6, y+35);

g.drawString("√", cul*lieju+x+6, y+55);//134-136為最后一列寫(xiě)入字體

g.drawString("附",cul*lieju+x+35, y+75);

g.drawString("件", cul*lieju+x+35, y+95);

g.drawString("張", cul*lieju+x+35, y+175);//134-136為最后一列后寫(xiě)入字體

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getActionCommand().equals("打印預(yù)覽")){

this.repaint();

}

}

}

使用drawLine()做了一個(gè)記賬憑證。

執(zhí)行點(diǎn)擊"打印"子菜單"打印預(yù)覽"就可顯示出我們所畫(huà)的"記賬憑證表"

希望這個(gè)小程序能夠給你點(diǎn)靈感

怎么用java代碼模擬一張圖片

用java代碼模擬一張圖片可以這樣操作：1.創(chuàng)建BufferedImage類

2.根據(jù)BufferedImage類得到一個(gè)Graphics2D對(duì)象

3.根據(jù)Graphics2D對(duì)象進(jìn)行邏輯操作

4.處理繪圖

5.將繪制好的圖片寫(xiě)入到圖片

java 實(shí)現(xiàn) 簡(jiǎn)單畫(huà)圖功能(簡(jiǎn)單點(diǎn)的)

樓主給你一個(gè)我編的，直接保存成pb.java編譯運(yùn)行，就是你要的畫(huà)圖功能

____________________________________________________________________

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//畫(huà)筆大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具標(biāo)記

//toolFlag工具對(duì)應(yīng)表：

//（0--畫(huà)筆）；（1--橡皮）；（2--清除）；

//（3--直線）；（4--圓）；（5--矩形）；

Color c = new Color(0,0,0); //畫(huà)筆顏色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//畫(huà)筆粗細(xì)

Point cutflag = new Point(-1, -1, c, 6, con);//截?cái)鄻?biāo)志

Vector paintInfo = null;//點(diǎn)信息向量組

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--畫(huà)筆，直線，圓，矩形，多邊形,橡皮，清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 顏色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按鈕及選擇項(xiàng)*/

//顏色選擇

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//畫(huà)筆大小選擇

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小選擇

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("畫(huà)筆");

drLine = new Button("畫(huà)直線");

drCircle = new Button("畫(huà)圓形");

drRect = new Button("畫(huà)矩形");

openPic = new Button("打開(kāi)圖畫(huà)");

savePic = new Button("保存圖畫(huà)");

colchooser = new Button("顯示調(diào)色板");

//各組件事件監(jiān)聽(tīng)

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

顏色 = new Label("畫(huà)筆顏色",Label.CENTER);

大小B = new Label("畫(huà)筆大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加組件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(顏色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打開(kāi)圖畫(huà)",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存圖畫(huà)",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

for(int i=0; in ;i++){

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://畫(huà)筆

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://畫(huà)直線

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://畫(huà)圓

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://畫(huà)矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截?cái)?，跳過(guò)

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//預(yù)選顏色

{

String name = ColChoice.getSelectedItem();

if(name=="black")

{c = new Color(0,0,0); }

else if(name=="red")

{c = new Color(255,0,0);}

else if(name=="green")

{c = new Color(0,255,0);}

else if(name=="blue")

{c = new Color(0,0,255);}

}

else if(e.getSource()==SizeChoice)//畫(huà)筆大小

{

String selected = SizeChoice.getSelectedItem();

if(selected=="1")

{

con = 1;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="3")

{

con = 3;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="5")

{con = 5;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="7")

{con = 7;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="9")

{con = 9;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

}

else if(e.getSource()==EraserChoice)//橡皮大小

{

String Esize = EraserChoice.getSelectedItem();

if(Esize=="5")

{ Econ = 5*2; }

else if(Esize=="9")

{ Econ = 9*2; }

else if(Esize=="13")

{ Econ = 13*2; }

else if(Esize=="17")

{ Econ = 17*3; }

}

}

public void mouseDragged(MouseEvent e)

{

Point p1 ;

switch(toolFlag){

case 0://畫(huà)筆

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p1);

repaint();

break;

case 1://橡皮

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, null, toolFlag, Econ);

paintInfo.addElement(p1);

repaint();

break;

default :

}

}

public void mouseMoved(MouseEvent e) {}

public void update(Graphics g)

{

paint(g);

}

public void mousePressed(MouseEvent e)

{

Point p2;

switch(toolFlag){

case 3://直線

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 4: //圓

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

default :

}

}

public void mouseReleased(MouseEvent e)

{

Point p3;

switch(toolFlag){

case 0://畫(huà)筆

paintInfo.addElement(cutflag);

break;

case 1: //eraser

paintInfo.addElement(cutflag);

break;

case 3://直線

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 4: //圓

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

default:

}

}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

public void mouseClicked(MouseEvent e){}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==pen)//畫(huà)筆

{toolFlag = 0;}

if(e.getSource()==eraser)//橡皮

{toolFlag = 1;}

if(e.getSource()==clear)//清除

{

toolFlag = 2;

paintInfo.removeAllElements();

repaint();

}

if(e.getSource()==drLine)//畫(huà)線

{toolFlag = 3;}

if(e.getSource()==drCircle)//畫(huà)圓

{toolFlag = 4;}

if(e.getSource()==drRect)//畫(huà)矩形

{toolFlag = 5;}

if(e.getSource()==colchooser)//調(diào)色板

{

Color newColor = JColorChooser.showDialog(this,"調(diào)色板",c);

c = newColor;

}

if(e.getSource()==openPic)//打開(kāi)圖畫(huà)

{

openPicture.setVisible(true);

if(openPicture.getFile()!=null)

{

int tempflag;

tempflag = toolFlag;

toolFlag = 2 ;

repaint();

try{

paintInfo.removeAllElements();

File filein = new File(openPicture.getDirectory(),openPicture.getFile());

picIn = new FileInputStream(filein);

VIn = new ObjectInputStream(picIn);

paintInfo = (Vector)VIn.readObject();

VIn.close();

repaint();

toolFlag = tempflag;

}

catch(ClassNotFoundException IOe2)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read object");

}

catch(IOException IOe)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read file");

}

}

}

if(e.getSource()==savePic)//保存圖畫(huà)

{

savePicture.setVisible(true);

try{

File fileout = new File(savePicture.getDirectory(),savePicture.getFile());

picOut = new FileOutputStream(fileout);

VOut = new ObjectOutputStream(picOut);

VOut.writeObject(paintInfo);

VOut.close();

}

catch(IOException IOe)

{

System.out.println("can not write object");

}

}

}

}//end paintboard

public class pb

{

public static void main(String args[])

{ new paintboard("畫(huà)圖程序"); }

}

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