java畫圖,java畫圖工具

本文目錄一覽：

1、java畫圖問題
2、如何用java實現畫圖
3、用Java一個簡單的畫圖程序
4、java 實現簡單畫圖功能(簡單點的)
5、JAVA的畫圖小程序
6、關於java中畫圖形的paint方法

java畫圖問題

因為程序初始化的時候會自動調用paint()方法而你沒有進行重寫在加入

public void paint(Graphics g){

}

這樣的一段代碼後在運行程序會看到一個藍色邊框的長方形橘黃色的實體長方形和粉紅色的

依次橫向排列但是經測試並不是每一次都能正確的初始化所以建議畫圖操作盡量在上述方法中進行操作

如何用java實現畫圖

使用Java的Graphics類進行繪圖

Graphics類提供基本的幾何圖形繪製方法，主要有：畫線段、畫矩形、畫圓、畫帶顏色的圖形、畫橢圓、畫圓弧、畫多邊形等

用Java一個簡單的畫圖程序

下面是我以前做的小程序，希望能給你點幫助！

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(“列印”);

JMenuItem jmi=new JMenuItem(“列印預覽”);

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”,”千”,”百”,”十”,”元”,”角”,”分”};

int csx=200;//列印x的初始坐標

int csy=200;//列印y的初始坐標

int x=csx;

int y=csy;

int a=x+20;//列印字體x的初始坐標

int b=y+20;//列印字體y的初始坐標

int row=7;//一共列印出幾條橫線

int cul=5;//一共列印出幾條豎線

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);//列印出記賬憑證這幾個字

g.drawLine(x+100, y-30, x+340, y-30);//列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”, 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);//此循環用於畫出表格的行

if(i==0)

y+=hangju*2;

else

y+=hangju;

}

y=csy;

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

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

g.drawLine(x, y, x, row*hangju+y);//此循環用於畫出表格的列

x+=lieju;

}

x=csx;

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

g.setColor(Color.red);//設置顏色

g.setFont(new Font(“”,Font.TYPE1_FONT,13));//設置表頭字體

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列印出一個表格形狀

int xx=lieju*3+x+10;

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

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循環用於畫出表格的列

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);//設置顏色

else

g.setColor(Color.BLUE);//設置顏色

xx+=10;

}

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

g.drawLine(xx, y+hangju, xx, row*hangju+y+hangju);//此循環用於畫出表格的列

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

if(n%2==0)

g.setColor(Color.red);//設置顏色

else

g.setColor(Color.BLUE);//設置顏色

xx+=10;

}

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

g.setColor(Color.black);//設置顏色

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

g.drawLine(x,yy , cul*lieju+x, yy);//此循環用於畫出表格的行

yy+=hangju;

}

yy=hangju*row+y;

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

g.drawLine(x, yy, x, (row+1)*hangju+y);//此循環用於畫出表格的列

if(j0){

x+=lieju;

}else{

x+=lieju*3;

}

}//112-128列印出表格的最後一行單元格

x=csx;

g.setFont(new Font(“”,Font.TYPE1_FONT,13));

g.drawString(“合計”,x+60, c);

g.drawString(“會計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);//列印出最後一列

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為最後一列寫入字體

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為最後一列後寫入字體

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getActionCommand().equals(“列印預覽”)){

this.repaint();

}

使用drawLine()做了一個記賬憑證。

執行點擊”列印”子菜單”列印預覽”就可顯示出我們所畫的”記賬憑證表”

希望這個小程序能夠給你點靈感

java 實現簡單畫圖功能(簡單點的)

樓主給你一個我編的，直接保存成pb.java編譯運行，就是你要的畫圖功能

____________________________________________________________________

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;//畫筆大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具標記

//toolFlag工具對應表：

//（0–畫筆）；（1–橡皮）；（2–清除）；

//（3–直線）；（4–圓）；（5–矩形）；

Color c = new Color(0,0,0); //畫筆顏色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//畫筆粗細

Point cutflag = new Point(-1, -1, c, 6, con);//截斷標誌

Vector paintInfo = null;//點信息向量組

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*/

//顏色選擇

ColChoice = new Choice();

ColChoice.add(“black”);

ColChoice.add(“red”);

ColChoice.add(“blue”);

ColChoice.add(“green”);

ColChoice.addItemListener(this);

//畫筆大小選擇

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(“畫筆”);

drLine = new Button(“畫直線”);

drCircle = new Button(“畫圓形”);

drRect = new Button(“畫矩形”);

openPic = new Button(“打開圖畫”);

savePic = new Button(“保存圖畫”);

colchooser = new Button(“顯示調色板”);

//各組件事件監聽

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(“畫筆顏色”,Label.CENTER);

大小B = new Label(“畫筆大小”,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,”打開圖畫”,FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,”保存圖畫”,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://畫直線

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

g2d.draw(line2);

break;

case 4://畫圓

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://截斷，跳過

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//預選顏色

{

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)//畫筆大小

{

String selected = SizeChoice.getSelectedItem();

if(selected==”1″)

{

con = 1;