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用JAVA做个画笔，有画笔和橡皮功能就行。越简单越好

3d画廊 • 2023-5-14 • 软件运维 • 阅读 7

用JAVA做个画笔，有画笔和橡皮功能就行。越简单越好,第1张

新建一个java文件,取名叫做PaintJava.java

代码如下:

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//画笔大小

int Econ = 5//橡皮大小

int toolFlag = 0//toolFlag:工具标记

//toolFlag工具对应表：

//（0--画笔）；（1--橡皮）；（2--清除）；

//（3--直线）；（4--圆）；（5--矩形）；

Color c = new Color(0,0,0)//画笔颜色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL)//画笔粗细

Point cutflag = new Point(-1, -1, c, 6, con)//截断标志

Vector paintInfo = null//点信息向量组

int n = 1

FileInputStream picIn = null

FileOutputStream picOut = null

ObjectInputStream VIn = null

ObjectOutputStream VOut = null

// *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/

Panel toolPanel

Button eraser, drLine,drCircle,drRect

Button clear ,pen

Choice ColChoice,SizeChoice,EraserChoice

Button colchooser

Label 颜色,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()

/*各工具按钮及选择项*/

//颜色选择

ColChoice = new Choice()

ColChoice.add("black")

ColChoice.add("red")

ColChoice.add("blue")

ColChoice.add("green")

ColChoice.addItemListener(this)

//画笔大小选择

SizeChoice = new Choice()

SizeChoice.add("1")

SizeChoice.add("3")

SizeChoice.add("5")

SizeChoice.add("7")

SizeChoice.add("9")

SizeChoice.addItemListener(this)

//橡皮大小选择

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("画笔")

drLine = new Button("画直线")

drCircle = new Button("画圆形")

drRect = new Button("画矩形")

openPic = new Button("打开图画")

savePic = new Button("保存图画")

colchooser = new Button("显示调色板")

//各组件事件监听

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)

颜色 = new Label("画笔颜色",Label.CENTER)

大小B = new Label("画笔大小",Label.CENTER)

大小E = new Label("橡皮大小",Label.CENTER)

//面板添加组件

toolPanel.add(openPic)

toolPanel.add(savePic)

toolPanel.add(pen)

toolPanel.add(drLine)

toolPanel.add(drCircle)

toolPanel.add(drRect)

toolPanel.add(颜色)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,"打开图画",FileDialog.LOAD)

openPicture.setVisible(false)

savePicture = new FileDialog(this,"保存图画",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=0i<n 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://画笔

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://画直线

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

g2d.draw(line2)

break

case 4://画圆

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://画矩形

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://截断，跳过

i=i+1

break

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//预选颜色

{

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)//画笔大小

{

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://画笔

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://直线

x = (int)e.getX()

y = (int)e.getY()

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

paintInfo.addElement(p2)

break

case 4: //圆

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://画笔

paintInfo.addElement(cutflag)

break

case 1: //eraser

paintInfo.addElement(cutflag)

break

case 3://直线

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: //圆

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)//画笔

{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)//画线

{toolFlag = 3}

if(e.getSource()==drCircle)//画圆

{toolFlag = 4}

if(e.getSource()==drRect)//画矩形

{toolFlag = 5}

if(e.getSource()==colchooser)//调色板

{

Color newColor = JColorChooser.showDialog(this,"调色板",c)

c = newColor

}

if(e.getSource()==openPic)//打开图画

{

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)//保存图画

{

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 PaintJava

{

public static void main(String args[])

{ new paintboard("画图程序")}

}

累啊..给分吧...!!

好麻烦哟！终于作好了！

Dim Ht As Boolean

Private Type Zb

X0 As Long

Y0 As Long

End Type

Dim Cszb As Zb

Private Sub Command1_Click()

Ht = True

End Sub

Private Sub Command2_Click()

Ht = False

End Sub

Private Sub Command3_Click()

Picture1.Cls

End Sub

Private Sub Command4_Click()

Dim Ys As Integer

Ys = InputBox("请填入正整数，0:黑色，1:红色，2:黄色，3:绿色，4:蓝色，>5:白色", "设置颜色", 0)

Select Case Ys

Case 0

Picture1.ForeColor = &H0&

Case 1

Picture1.ForeColor = &HFF&

Case 2

Picture1.ForeColor = &HFFFF&

Case 3

Picture1.ForeColor = &HFF00&

Case 4

Picture1.ForeColor = &HFF0000

Case Else

Picture1.ForeColor = &HFFFFFF

End Select

End Sub

Private Sub Command5_Click()

Dim Kd As Integer

Kd = Int(InputBox("请输入线条宽度", "线条宽度", 1))

If Kd <1 Then Kd = 1

Picture1.DrawWidth = Kd

End Sub

Private Sub Command6_Click()

End

End Sub

Private Sub Form_Load()

Me.Caption = "简单画笔"

Command1.Caption = "开始画图"

Command2.Caption = "停止画图"

Command3.Caption = "画板清空"

Command4.Caption = "设置颜色"

Command5.Caption = "设置宽度"

Command6.Caption = "退出"

Picture1.AutoRedraw = True

Ht = False

Ys = 0

End Sub

Private Sub Picture1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Cszb.X0 = X

Cszb.Y0 = Y

End Sub

Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)

If Ht And Button = 1 Then

Picture1.Line (Cszb.X0, Cszb.Y0)-(X, Y)

Cszb.X0 = X

Cszb.Y0 = Y

End If

End Sub

画笔一：帧-动作：

this.createEmptyMovieClip("canvas_mc", 999)

var

isDrawing:Boolean = false

//

clear_btn.onRelease = function()

{

canvas_mc.clear()

}

//

var mouseListener:Object = new

Object()

mouseListener.onMouseDown = function() {

canvas_mc.lineStyle(5,

0xFF0000, 100)

canvas_mc.moveTo(_xmouse, _ymouse)

isDrawing =

true

}

mouseListener.onMouseMove = function() {

if (isDrawing)

{

canvas_mc.lineTo(_xmouse,

_ymouse)

updateAfterEvent()

}

}

mouseListener.onMouseUp =

function() {

isDrawing =

false

}

Mouse.addListener(mouseListener)

建一个清除按钮，实例名：clear_btn。

——————————————————————————————————————————————

画笔二：

帧-动作：

var

empiremue = new

ContextMenu()

//删除原始菜单状态！

empiremue.hideBuiltInItems()

//自定义菜单项目！

empiremue.customItems.push(new

ContextMenuItem("鼠标写字", h1))

empiremue.customItems.push(new

ContextMenuItem("清除字迹", h2))

empiremue.customItems.push(new

ContextMenuItem("退出程序", h3,true))

empiremue.customItems.push(new

ContextMenuItem("退出写字", h4))

function h3()

{

fscommand("quit")

}

function h4()

{

Mouse.show()//显示鼠标

_root.clear()

//_root.pen=false

_root.onMouseMove=function(){

updateAfterEvent()

pen._x

= _root._xmouse+1200

pen._y = _root._ymouse+800

}}

function h1()

{

stop()

//_root.mc._visible=false//影片不可见

var

xx=Math.random()*0xFFFFFF

//Mouse.show()//显示鼠标

_root.createEmptyMovieClip("pen",

1)

pen.lineStyle(4, 0x0082FF)

pen._x = 200

pen._y = 200

//浅兰色笔体

pen.beginFill(0x0082FF, 100)

pen.lineTo(20, -8)

pen.lineTo(65, -8)

pen.lineTo(65, 8)

pen.lineTo(20, 8)

pen.lineTo(20, -8)

pen.beginFill(0x0082FF, 100)

endFill(pen)

pen.beginFill(xx,

100)

pen.lineStyle(4, xx)

pen.lineTo(0, 0)

pen.lineTo(20, 8)

pen.lineTo(20, -8)

endFill(pen)

pen._rotation = -50

Mouse.hide()

//定义onMouseDown函数

//Math.random()*0xFFFFFF用代替可使每笔的颜色不同

_root.onMouseDown=function(){

//设定线条样式

_root.lineStyle(4,xx,100)

//绘制直线

_root.moveTo(_root._xmouse,_root._ymouse)

//定义变量isdrawing,并赋值为真

isdrawing=true

}

_root.onMouseMove=function(){

updateAfterEvent()

pen._x

= _root._xmouse

pen._y =

_root._ymouse

//如果变量为真

if(isdrawing==true){

//绘制直线断

_root.lineTo(_root._xmouse,_root._ymouse)

//刷新画面

updateAfterEvent()

}

}

_root.onMouseUp=function(){

//设定变量isdrawing的值为假

isdrawing=false

}

}

function

h2() {

Mouse.hide()

_root.clear()

}

_root.menu = empiremue

画笔三：用鼠标画线

onMouseDown=function ()

{

lineStyle(2,0*000000,100)

lineTo(_xmouse,_ymouse)

}

onMouseMove = function() {

if (a)

{

lineStyle(2,0x000000,100)//指定线条的粗度为2，颜色为黑色，透明度为100；

lineTo(_xmouse,

_ymouse)//画线至鼠标所在位置；

}

updateAfterEvent()//强制刷新；Flash

强制进行显示刷新工作。该语句不依赖于时间帧的触发。

}

onMouseDown = function() {

a = true

//鼠标按下,给a变量赋值true，即执行上面的if后面括号内的语句，开始画线；

moveTo(_xmouse,

_ymouse)//重新定位开始点；

}

onMouseUp = function() {

a = false

//鼠标松开,给a变量赋值false，不执行上面的if后面括号内的语句，停止画线；

}

画笔四：

*两点间画直线

*画螺旋线

*画正方形、圆、椭圆

*抛物线

*正弦、余弦线

使用方法：加到帧中就可

// 画直线

// / x1, y1: 起点坐标

// x2, y2: 终点坐标

// k是层次

Movieclip.prototype.drawline = function(x1, y1, x2, y2, k) {

this.linestyle(1)

this.moveTo(x1, y1)

this.lineTo(x2, y2)

}

// 从(0,0)到(100,100)画一条线

_root.createEmptyMovieClip("mc", 10)

mc.drawline(0, 0, 100, 100)

// 画螺旋线

// w、h为宽和高

// f控制线的长短，用弧度表示

Movieclip.prototype.drawhelix = function(w, h, f) {

for (var i = 0

i<fi += 0.05) {

this.lineTo(x=Math.sin(i)*i*w, y=Math.cos(i)*i*h)

this.linestyle(1)

}

}

// 以(100,100)为中心画螺旋线

_root.createEmptyMovieClip("luo", 1)

with (luo) {

drawhelix(5, 5,

13)

_x += 100

_y += 100

}

// 多功能函数，可画圆，椭圆，正多边形等

// n为边数

Movieclip.prototype.drawmany = function(w, h, n) {

f = 2*Math.PI

for (var i = 0i<=f/n*(n+1)i += f/n) {

this.lineTo(x=Math.sin(i)*w, y=Math.cos(i)*h)

this.linestyle(1)

}

}

// 画一正五边形

_root.createEmptyMovieClip("duobian", 2)

with

(duobian) {

drawmany(50, 50, 5)

_x += 250

_y += 100

//

5为多边形的边数，6.3为2pai

}

// 画一椭圆

_root.createEmptyMovieClip("tuo", 3)

with (tuo) {

drawmany(25, 50, 100)

_x += 400

_y += 100

}

// 圆

_root.createEmptyMovieClip("yuan", 4)

with (yuan) {

drawmany(50, 50, 100)

_x += 400

_y += 300

}

// 抛物线

Movieclip.prototype.drawparabola = function(l, r, k) {

for (var i = -l

i<=ri += 1) {

this.lineTo(x=i, y=k*i*i)

this.linestyle(1)

}

}

// 调用

_root.createEmptyMovieClip("parabola", 100)

with

(parabola) {

drawparabola(50, 50, 0.05)

_x += 200

_y += 200

// 顶点坐标

}

// 正弦线,余弦类似

Movieclip.prototype.drawsin = function(n,

k) {

for (var i = 0i<=90*ni += 1) {

this.lineTo(x=i,

y=k*Math.sin(i*Math.PI/180))

this.linestyle(1)

}

}

_root.createEmptyMovieClip("sin", 101)

with (sin) {

drawsin(4, 50)

_x += 200

_y += 200

// 顶点坐标

}

Movieclip.prototype.drawwave

= function(w, h) {

for (var i = 0i<=6.3i += 0.01) {

this.lineTo(x=w/Math.cos(i), y=h*Math.sin(i)/Math.cos(i))

this.linestyle(1)

}

}

_root.createEmptyMovieClip("wave", 105)

with (wave) {

drawwave(100, 100)

_x += 200

_y += 200

//

顶点坐标

}

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原文地址: http://outofmemory.cn/yw/11281750.html

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