java代码画一张图 java怎么画图片

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！

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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 如何用BufferedImage画出图像

drawimage都是对Image对象处理，和组件的绘制一点关系也没;

把newImage的图再画到image里面去;

实例代码如下：

public class Tank extends JFrame {

private Image img = null;

boolean fi = false;

BufferedImage bi;

public Tank() {

this.addKeyListener(new KeyMonitor());

this.setBounds(300, 300, 300, 300);

this.setVisible(true);

this.setDefaultCloseOperation(Tank.EXIT_ON_CLOSE);

}

class KeyMonitor extends KeyAdapter {

@Override

public void keyPressed(KeyEvent e) {

switch (e.getKeyCode()) {

case 37: {

img = getToolkit().createImage("res/TankPic/pre.GIF");

fi = true;

System.out.println(img);

repaint();

break;

}

public void paint(Graphics g) {

super.paint(g);

bi = new BufferedImage(getSize().width, getSize().height, BufferedImage.TYPE_INT_ARGB);

bi.getGraphics();

if (fi) {

g = img.getGraphics();

g.drawImage(bi, 50, 50, 40, 40, this);

}

public static void main(String[] args) {

new Tank();

}

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;