绘制图像java代码 java绘制图片代码

JAVA编译简易画图板代码

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=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://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 pb

{

public static void main(String args[])

{ new paintboard("画图程序"); }

}

相关问答

Q1: 现在要用JAVA绘制3D立体图像，请大师指点，谢谢！！

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大家可以先把【绘学霸】APP下载到自己手机，方便碎片时间学习——绘学霸APP下载：

Q2: java 在已有的图片上画图

//读取图片文件绘制图像java代码，得到BufferedImage对象

BufferedImage bimg=ImageIO.read(new FileInputStream("图片文件路径"));

//得到Graphics2D 对象

Graphics2D g2d=(Graphics2D)bimg.getGraphics();

//设置颜色和画笔粗细

g2d.setColor(Color.RED);

g2d.setStroke(new BasicStroke(3));

//绘制图案或文字

g2d.drawString("文本", x坐标, y坐标);

//保存新图片

ImageIO.write(bimg, "JPG",new FileOutputStream("文件路径"));

Q3: 求java画初等函数图像，要求可以画任意函数，如sin（PI*x），pow（E，x），及其加减乘除后的函数

程序有点简陋，不过功能倒是全部实现了，你自己看吧

有些参数你自己可以调整

//这个程序哎，以后有机会再改进吧，至少坐标的移动我写的太烦了，可以直接指定的，擦

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.EventQueue;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.geom.Line2D;

import java.awt.geom.Point2D;

import javax.swing.JComponent;

import javax.swing.JFrame;

public class JFrame1 extends JFrame {

private JPanel1 jp;

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

JFrame1 frame = new JFrame1();

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

public JFrame1() {

jp = new JPanel1();

jp.setBackground(Color.BLACK);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

getContentPane().setLayout(new BorderLayout(0, 0));

this.setBackground(Color.BLACK);

this.setContentPane(jp);

this.setSize(800, 600);

this.setLocationRelativeTo(null);

this.setVisible(true);

}

}

class JPanel1 extends JComponent{

int width,height;

int zx,zy;

int unit = 100; //单位长度包含的像素，也可考虑分别设置x，y轴的单位长度像素

public void paintComponent(Graphics g){

g.setColor(Color.BLACK);

width = this.getWidth();

height = this.getHeight();

// zx = 100;

// zy = 200;

zx = width/2; //新坐标系原点坐标位置，可以改变

zy = height/2;

g.setColor(Color.BLACK);

this.paintAxis(g);

this.paintMethod(g);

this.paintMethod1(g);

this.paintMethod2(g);

}

private void paintMethod(Graphics g1){

Point2D temp1,temp2;

double x,y;

Graphics2D g = (Graphics2D)g1;

g.setColor(Color.GREEN);

x = -1.0*zx/unit;

y = Math.pow(x, 3) ;

temp1 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

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

x += 1.0/unit;

y = Math.pow(x, 3) ;

if ( Math.abs(y) zy){

temp2 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

g.draw(new Line2D.Double(temp1, temp2));

temp1 = temp2;

}

}

}

private void paintMethod1(Graphics g1){

Point2D temp1,temp2;

double x,y;

Graphics2D g = (Graphics2D)g1;

g.setColor(Color.BLUE);

x = -1.0*zx/unit;

y = Math.pow(Math.E, x) ;

temp1 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

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

x += 1.0/unit;

y = Math.pow(Math.E, x) ;

if ( Math.abs(y) zy){

temp2 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

g.draw(new Line2D.Double(temp1, temp2));

temp1 = temp2;

}

}

}

private void paintMethod2(Graphics g1){

Point2D temp1,temp2;

double x,y;

Graphics2D g = (Graphics2D)g1;

g.setColor(Color.PINK);

x = -1.0*zx/unit;

y = Math.sin(Math.PI * x);

temp1 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

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

x += 1.0/unit;

y = Math.sin(Math.PI * x);

if ( Math.abs(y) zy){

temp2 = new Point2D.Double(this.alterX(x * unit), this.alterY(y * unit));

g.draw(new Line2D.Double(temp1, temp2));

temp1 = temp2;

}

}

}

//画坐标轴,可以通过zx,zy的处置来改变原点位置;

private void paintAxis(Graphics g){

g.setColor(Color.CYAN);

g.drawLine(0, zy, width, zy);

g.drawLine(zx, 0, zx, height);

g.drawString("0",zx + 2,zy +12); //画原点数字

for(int i = 1; i*unit width; i++){

g.drawLine(zx + i*unit, zy - 10, zx + i*unit, zy);//x 正向

g.drawLine(zx - i*unit, zy - 10, zx - i*unit, zy);//x 负向

g.drawString(String.valueOf(i), zx + i*unit -3, zy + 12); // x轴数字

g.drawString(String.valueOf(i * -1), zx - i*unit -8, zy + 12); // x轴数字

g.drawLine(zx , zy + i*unit, zx + 10, zy + i*unit);//y 负向

g.drawLine(zx , zy - i*unit, zx + 10, zy - i*unit);//y 正向

g.drawString(String.valueOf(i), zx -12 , zy - i*unit + 5); // y轴数字

g.drawString(String.valueOf(i * -1), zx -12 , zy + i*unit + 5); // y轴数字

}

}

private double alterX(double x){ //新坐标对应的原坐标

return x + zx;

}

private double alterY(double y){ //新坐标对应的原坐标

return -1 *( y - zy);

}

}

Q4: JAVA在面板上画图片有好多错误，望大佬相助，困扰好久了

你是说 JPanel 吗？两种方法：

添加 JLabel，给 JLabel 添加 ImageIcon，然后放置 JLabel 到 JPanel 上就行了：

JPanel pnl = new JPanel();

......

JLabel lblImage = new JLabel(new ImageIcon("你的文件名")); //创建一个带图片的 JLabel

lblImage.setBounds(0, 0, pnl.getWidth(), pnl.getHeight()); //设置 图片的横坐标、纵坐标、宽、高

pnl.add(lblImage); //放置这个 JLabel 到你的 JPanel 上面

还有一种方法是重写 JPanel 的 paint() 方法：

class YourPanel extends JPanel {

private Image img = Toolkit.getDefaultToolkit().createImage("你的文件名"); //用 Toolkit 的 createImage 方法来创建一个 Image 对象

@Override public void paint (Graphics g) {

super.paint(g);

g.drawImage(img, 0, 0, getWidth(), getHeight()); //绘制图片，第一个参数是 Image 对象，第二个参数是 横坐标，第三个是 纵坐标，第四个是 宽，第五个是 高

}

}

以上你隐式重写也可以：

JPanel pnl = new JPanel() {

@Override public void paint (Graphics g) {

...... //但是要注意这样如果你把 Image 声明成了局部变量或者参数形式，你需要声明成 final

}

}

Q5: 用java编写画图工具

要求比较多阿 给绘制图像java代码你个简单绘制图像java代码的供参考

import java.awt.*;

import java.awt.event.*;

class Mycanvas extends Canvas

{ int x,y,r;

Mycanvas()

{ setBackground(Color.cyan);

}

public void setX(int x)

{ this.x=x;

}

public void setY(int y)

{ this.y=y;

}

public void setR(int r)

{ this.r=r;

}

public void paint(Graphics g)

{ g.drawOval(x,y,2*r,2*r); //通过Graphics对象画圆

}

}

class WindowCanvas extends Frame implements ActionListener

{ Mycanvas canvas;

TextField inputR,inputX,inputY;

Button b;

WindowCanvas()

{ canvas=new Mycanvas();//创建画布对象

inputR=new TextField(5);

inputX=new TextField(4);

inputY=new TextField(4);

Panel pNorth=new Panel(), pSouth=new Panel();//创建两个面板

pNorth.add(new Label("圆绘制图像java代码的位置坐标绘制图像java代码："));

pNorth.add(inputX);

pNorth.add(inputY);

pSouth.add(new Label("圆的半径："));

pSouth.add(inputR);

b=new Button("确定");

b.addActionListener(this);

pSouth.add(b);

add(canvas,BorderLayout.CENTER); //添加画布对象到中央区域

add(pNorth,BorderLayout.NORTH);

add(pSouth,BorderLayout.SOUTH);

setBounds(100,100,300,200);

setVisible(true);

}

public void actionPerformed(ActionEvent e)

{ int x,y,r;

try { x=Integer.parseInt(inputX.getText());

y=Integer.parseInt(inputY.getText());

r=Integer.parseInt(inputR.getText());

canvas.setX(x); //设置自定义画布对象的实例变量x

canvas.setY(y);//设置自定义画布对象的实例变量y

canvas.setR(r);//设置自定义画布对象的实例变量r

canvas.repaint();//重画自定义画布对象

}

catch(NumberFormatException ee)

{ x=0;y=0;r=0;

}

}

}

public class Example18

{ public static void main(String args[])

{ new WindowCanvas();

}

}

绘制图像java代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java绘制图片代码、绘制图像java代码的信息别忘了在本站进行查找喔。