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随意画等功能的java画图程序,根据java代码画类图

本文目录一览:

用Java一个简单的画图程序

下面是我以前做的小程序,希望能给你点帮助!

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("编辑");

jmb.add(jm);

jm=new JMenu("打印");

JMenuItem jmi=new JMenuItem("打印预览");

jmi.addActionListener(this);

jm.add(jmi);

jmb.add(jm);

jm=new JMenu("帮助");

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","子目或户名","借方金额","贷方金额"};

String danwei[]={"千","百","十","万","千","百","十","元","角","分"};

int csx=200;//打印x的初始坐标

int csy=200;//打印y的初始坐标

int x=csx;

int y=csy;

int a=x+20;//打印字体x的初始坐标

int b=y+20;//打印字体y的初始坐标

int row=7;//一共打印出几条横线

int cul=5;//一共打印出几条竖线

int hangju=30;//线与线之间的纵向间距

int lieju=100;//线与线之间的横向间距

int yy=hangju*row+y;

int c=yy+20;

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

g.drawString("记 账 凭 证", x+160, y-40);//打印出记账凭证这几个字

g.drawLine(x+100, y-30, x+340, y-30);//打印出记账凭证下面的那条线

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

g.drawString("年 月 日 第_______号", 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);//此循环用于画出表格的行

if(i==0)

y+=hangju*2;

else

y+=hangju;

}

y=csy;

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

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

g.drawLine(x, y, x, row*hangju+y);//此循环用于画出表格的列

x+=lieju;

}

x=csx;

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

g.setColor(Color.red);//设置颜色

g.setFont(new Font("",Font.TYPE1_FONT,13));//设置表头字体

if(z3)

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

else

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

a+=lieju;

}//76-89打印出一个表格形状

int xx=lieju*3+x+10;

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

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循环用于画出表格的列

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

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

if(v%2==0)

g.setColor(Color.red);//设置颜色

else

g.setColor(Color.BLUE);//设置颜色

xx+=10;

}

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

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循环用于画出表格的列

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

if(n%2==0)

g.setColor(Color.red);//设置颜色

else

g.setColor(Color.BLUE);//设置颜色

xx+=10;

}

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

g.setColor(Color.black);//设置颜色

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

g.drawLine(x,yy , cul*lieju+x, yy);//此循环用于画出表格的行

yy+=hangju;

}

yy=hangju*row+y;

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

g.drawLine(x, yy, x, (row+1)*hangju+y);//此循环用于画出表格的列

if(j0){

x+=lieju;

}else{

x+=lieju*3;

}

}//112-128打印出表格的最后一行单元格

x=csx;

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

g.drawString("合 计",x+60, c);

g.drawString("会计主管 记账 出纳 审核 制证", 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("记",cul*lieju+x+6, y+15);

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

g.drawString("√", cul*lieju+x+6, y+55);//134-136为最后一列写入字体

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

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

g.drawString("张", cul*lieju+x+35, y+175);//134-136为最后一列后写入字体

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getActionCommand().equals("打印预览")){

this.repaint();

}

}

}

使用drawLine()做了一个记账凭证。

执行点击"打印"子菜单"打印预览"就可显示出我们所画的"记账凭证表"

希望这个小程序能够给你点灵感

java 绘图程序

我基于你原来画图的方法,添加了事件触发的命令b[j].setActionCommand("b" + j);否则你不能在事件响应处理的方法中使用e.getActionCommand(),而且字符串的比较用equals方法比较好。现在可以运行了,你可以看一下:

import java.applet.Applet;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class drawing extends Applet implements ActionListener {

Button b[] = new Button[5];

String fontname = "仿宋_GB2312";

int style = Font.PLAIN;

int size = 24;

int index = 0;

Font myfont;

public void init() {

setSize(700,700);

myfont = new Font(fontname, style, size);

b[0] = new Button("扇形");

b[1] = new Button("圆形");

b[2] = new Button("三角形");

b[3] = new Button("长方形");

b[4] = new Button("椭圆形");

for (int j = 0; j b.length; j++) {

b[j].setBounds(10, 10, 50, 20);

b[j].addActionListener(this);

b[j].setActionCommand("b" + j);

add(b[j]);

}

}

public void actionPerformed(ActionEvent e) {

if (e.getActionCommand().equals("b0")) {

index = 0;

repaint();

}

if (e.getActionCommand().equals("b1")) {

index = 1;

repaint();

}

if (e.getActionCommand().equals("b2")) {

index = 2;

repaint();

}

if (e.getActionCommand().equals("b3")) {

index = 3;

repaint();

}

if (e.getActionCommand().equals("b4")) {

index = 4;

repaint();

}

}

public void paint(Graphics g) {

switch (index) {

case 0:

g.fillArc(0, 60, 80, 60, 30, 120);

break;

case 1:

g.drawOval( 300, 50, 60, 60);

break;

case 2:

Polygon filledPolygon = new Polygon();

filledPolygon.addPoint(380, 50);

filledPolygon.addPoint(380, 110);

filledPolygon.addPoint(450, 90);

g.drawPolygon(filledPolygon);

break;

case 3:

g.drawRect( 200, 50, 80, 60);

break;

case 4:

g.drawOval(100, 50, 80, 60);

break;

default:

g.fillArc(0, 60, 80, 60, 30, 120);

break;

}

}

/*

* public void paint(Graphics g) { g.fillArc( 0, 60, 80, 60, 30, 120);

* //绘制扇形 g.drawOval( 100, 50, 80, 60); g.drawRect( 200, 50, 80, 60);

* g.drawOval( 300, 50, 60, 60); Polygon filledPolygon=new Polygon();

* filledPolygon.addPoint(380,50); filledPolygon.addPoint(380,110);

* filledPolygon.addPoint(450,90); g.drawPolygon(filledPolygon); }

*/

}

java 实现 简单画图功能(简单点的)

楼主给你一个我编的,直接保存成pb.java编译运行,就是你要的画图功能

____________________________________________________________________

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;//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"); }

}

用Java编写一个绘制图形的小程序

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import javax.swing.*;

//不规则图形的绘制

public class IrregularShapeDemo extends JFrame {

GeneralPath gPath= new GeneralPath(); //GeneralPath对象实例

Point aPoint;

//构造函数

public IrregularShapeDemo() {

super("不规则图形的绘制"); //调用父类构造函数

enableEvents(AWTEvent.MOUSE_EVENT_MASK|AWTEvent.MOUSE_MOTION_EVENT_MASK); //允许事件

setSize(300, 200); //设置窗口尺寸

setVisible(true); //设置窗口可视

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序

}

public void paint(Graphics g) { //重载窗口组件的paint()方法

Graphics2D g2D = (Graphics2D)g; //获取图形环境

g2D.draw(gPath); //绘制路径

}

public static void main(String[] args) {

new IrregularShapeDemo();

}

protected void processMouseEvent(MouseEvent e) { //鼠标事件处理

if(e.getID() == MouseEvent.MOUSE_PRESSED) {

aPoint = e.getPoint(); //得到当前鼠标点

gPath = new GeneralPath(); //重新实例化GeneralPath对象

gPath.moveTo(aPoint.x,aPoint.y); //设置路径点

}

}

protected void processMouseMotionEvent(MouseEvent e) { //鼠标运动事件处理

if(e.getID() == MouseEvent.MOUSE_DRAGGED) {

aPoint = e.getPoint(); //得到当前鼠标点

gPath.lineTo(aPoint.x, aPoint.y); //设置路径

gPath.moveTo(aPoint.x, aPoint.y);

repaint(); //重绘组件

}

}

}

如何实现java画图程序,并可在已画的图上添加文字等,求大神T-T

只提指导,没有源码。

在 Java 中要自定义组件,一般是覆盖掉 protected void paintComponent(Graphics g); 方法就可以了,对于你这个类似画笔的程序,首先,整个画布是一个自定义的继承自像 JPanel 一样的东西,不过我们需要覆盖它的 paintComponent 方法,因为:一、我们需要在当鼠标拖放一个东西时我们移动这个选中的图形时记住它的位置;二、设定 label 时需要保存它的 Label。三、知道图形的形状。

,然后在 paintComponent 时依次画出各个图形来。

要绘图:

1、直线,g.drawLine(x,y,x2,y2); // 参数分别是起止点坐标。

2、矩形,g.fillRect(x, y, w, h); // 参数分别是左上角坐标和宽及高。

3、椭圆,g.fillOval(x, y, w, h); // 参数分别是椭圆形的外切矩形的左上角坐标及宽和高,当w 和 h 相等时是个圆。

准备绘图前 g.setColor() 设置前景色;先把整个画布用 g.fillRect() 涂成白色,再分别画各个图形,最后绘制 Label 应该在画图形之后再做。

移动图形,是给 画布组件 addMouseMotionListener 来监听事件的,在拖动时先通过 mouseDragged 事件的 MouseEvent.point 知道它的位置是在哪个图形的内部,之后的移动就修改这个图形的位置。