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java繪圖小程序代碼 java繪制圖形代碼

如何用Java編寫一個繪制圖形的小程序？

import java.awt.*;

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import java.awt.event.*;

import java.awt.geom.*;

import javax.swing.*;

//不規(guī)則圖形的繪制

public class IrregularShapeDemo extends JFrame {

GeneralPath gPath= new GeneralPath(); //GeneralPath對象實例

Point aPoint;

//構(gòu)造函數(shù)

public IrregularShapeDemo() {

super("不規(guī)則圖形的繪制"); //調(diào)用父類構(gòu)造函數(shù)

enableEvents(AWTEvent.MOUSE_EVENT_MASK|AWTEvent.MOUSE_MOTION_EVENT_MASK); //允許事件

setSize(300, 200); //設(shè)置窗口尺寸

setVisible(true); //設(shè)置窗口可視

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //關(guān)閉窗口時退出程序

}

public void paint(Graphics g) { //重載窗口組件的paint()方法

Graphics2D g2D = (Graphics2D)g; //獲取圖形環(huán)境

g2D.draw(gPath); //繪制路徑

}

public static void main(String[] args) {

new IrregularShapeDemo();

}

protected void processMouseEvent(MouseEvent e) { //鼠標事件處理

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

aPoint = e.getPoint(); //得到當前鼠標點

gPath = new GeneralPath(); //重新實例化GeneralPath對象

gPath.moveTo(aPoint.x,aPoint.y); //設(shè)置路徑點

}

}

protected void processMouseMotionEvent(MouseEvent e) { //鼠標運動事件處理

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

aPoint = e.getPoint(); //得到當前鼠標點

gPath.lineTo(aPoint.x, aPoint.y); //設(shè)置路徑

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

repaint(); //重繪組件

}

}

}

JAVA的畫圖小程序

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

class MyLine

{

private int x1,x2,y1,y2;

public MyLine(int x1,int x2,int y1,int y2)

{

this.x1=x1;

this.x2=x2;

this.y1=y1;

this.y2=y2;

}

public void drawMe(Graphics g)

{

g.drawLine(x1,y1,x2,y2);

g.drawString("起始坐標："+new String(x1+","+y1),x1,y1);

}

}

public class DrawLine extends Frame

{

Vector v=new Vector();

public static void main(String[]args)

{

DrawLine dl=new DrawLine();

dl.init();

}

public void paint(Graphics g)

{

g.setColor(Color.BLUE);

Enumeration en=v.elements();

while(en.hasMoreElements())

{

MyLine m=(MyLine)en.nextElement();

m.drawMe(g);

}

}

public void init()

{

setSize(300,300);

setVisible(true);

addMouseListener(new MouseAdapter()

{

int x1,x2,y1,y2;

public void mousePressed(MouseEvent e)

{

x1=e.getX();

y1=e.getY();

}

public void mouseReleased(MouseEvent e)

{

x2=e.getX();

y2=e.getY();

Graphics g=e.getComponent().getGraphics();

g.setColor(Color.BLUE);

g.drawLine(x1,y1,x2,y2);

g.drawString(new String("起始點坐標："+x1+","+y1),x1,y1);

v.add(new MyLine(x1,x2,y1,y2)); // here pay attention

}

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

((Window)e.getSource()).dispose();

System.exit(0);

}}

);

}

}

求JAVA大神給我發(fā)一段完整可運行的java圖形小程序的代碼（不用太多類），謝謝了

/*計算器*/

import java.awt.*;

import javax.swing.*;

import javax.swing.border.*;

import java.awt.event.*;

public class Calculator implements ActionListener{

JFrame frame;

JPanel panel;

JTextField tfShow;/*定義顯示文本框*/

JButton b1[]=new JButton[10]; /*數(shù)字按鈕*/

JButton b2[]=new JButton[6]; /*操作按鈕*/

boolean isNumber;/*判斷是否輸入多位數(shù)字的變量*/

double number;/*存儲輸入數(shù)值、顯示結(jié)果的變量*/

double result;/*存儲中間運算結(jié)果的變量*/

char operator;/*存儲當前操作符的成員變量*/

public Calculator(){

frame=new JFrame("計算器");

frame.setSize(300,300);/*指定框架窗口的大小*/

frame.setResizable(false);/*使框架窗口不可改變大小*/

JPanel contentPane=(JPanel)frame.getContentPane();

contentPane.setBorder(new EmptyBorder(20,20,20,20));/*繪制框架的指定大小的空透明邊框*/

tfShow=new JTextField("0",25);/*指定屬性的文本域*/

tfShow.setHorizontalAlignment(JTextField.RIGHT);/*設(shè)置文本域中文本的對齊方式*/

isNumber=true;/*初始值設(shè)置*/

number=0;/*初始值設(shè)置*/

result=0;/*初始值設(shè)置*/

operator=' ';/*初始值設(shè)置*/

for(int i=0;ib1.length;i++){

b1[i]=new JButton(Integer.toString(i));/*創(chuàng)建數(shù)字按鈕*/

b1[i].setActionCommand(Integer.toString(i));

b1[i].addActionListener(this);

b1[i].setForeground(Color.blue);

}

String bs[]={"/","*","-","C","+","="};

for(int i=0;ib2.length;i++){

b2[i]=new JButton(bs[i]);/*創(chuàng)建操作按鈕*/

b2[i].setActionCommand(bs[i]);

b2[i].addActionListener(this);

b2[i].setForeground(Color.red);

}

panel=new JPanel();

panel.setLayout(new GridLayout(4,5));

panel.add(b1[1]);

panel.add(b1[2]);

panel.add(b1[3]);

panel.add(b2[0]);

panel.add(b1[4]);

panel.add(b1[5]);

panel.add(b1[6]);

panel.add(b2[1]);

panel.add(b1[7]);

panel.add(b1[8]);

panel.add(b1[9]);

panel.add(b2[2]);

panel.add(b1[0]);

panel.add(b2[3]);

panel.add(b2[4]);

panel.add(b2[5]);

frame.add(tfShow,BorderLayout.NORTH);/*將文本框放置在框架上方*/

frame.add(panel,BorderLayout.CENTER);/*將裝有按鈕組的panel放在框架的中心*/

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/*設(shè)置框架窗口的默認窗口關(guān)閉操作*/

frame.setVisible(true);/*設(shè)置框架可見*/

}

public double getDisplay(){/*返回要顯示的結(jié)果*/

return number;

}

public void reDisplay(){/*刷新文本域的內(nèi)容*/

tfShow.setText(""+getDisplay());

}

/*對輸入數(shù)字的處理*/

public void numberProcess(int num){

if(isNumbernum!=0){

String s1=Integer.toString(num);

String s2=Integer.toString((int)(this.number));

this.number=Double.parseDouble(s2+s1);/*對多位數(shù)字的處理*/

}else{

this.number=num;

}

isNumber=true;/*輸入連續(xù)數(shù)字（即多位數(shù)字）時為真*/

}?

public void operationProcess(char operator){/*根據(jù)輸入的操作符改變當前操作符*/

switch(operator){

case '-':

this.operator='-';

break;

case '+':

this.operator='+';

break;

case '*':

this.operator='*';

break;

case '/':

this.operator='/';

break;

}

result=number;

isNumber=false;/*輸入操作符時表示輸入連續(xù)數(shù)字的標記變量為假*/

}?

public void clear(){

number=0;

result=0;

}??

public void equal(){/*計算運算結(jié)果*/

switch(operator){

case '-':

result=result-number;

break;

case '+':

result=result+number;

break;

case '*':

result=result*number;

break;

case '/':

result=result/number;

break;

case ' ':

result=number;

break;

}

number=result; /*把運算結(jié)果賦值給顯示變量*/

isNumber=false;

operator=' ';?

}?

public static void main(String args[]){

Calculator cal=new Calculator();/*創(chuàng)建計算器*/

}

public void actionPerformed(ActionEvent e){

String command=e.getActionCommand();/*獲取按鈕激發(fā)的操作事件的命令名稱*/

char c=command.charAt(0);/*將按鈕命令名稱的第一個字符賦值給一個字符c*/

switch(c){

case '1':

case '2':

case '3':

case '4':

case '5':

case '6':

case '7':

case '8':

case '9':

case '0':

int number=Integer.parseInt(command);

numberProcess(number);/*輸入數(shù)字的處理*/

break;

case '+':

case '-':

case '*':

case '/':

operationProcess(c);/*算數(shù)運算符的處理*/

break;

case '=':equal();break;/*計算運算結(jié)果*/

case 'C':clear();break;/*清零*/

}

reDisplay(); /*在文本域中顯示信息*/

}

}

運行截圖：

java繪圖，求代碼

上代碼：

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.LayoutManager;

import java.awt.Paint;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import java.awt.event.*;

public class YuanYiDong extends JFrame{

private static int BANJIN=0;

private static int X=0;

private static int Y=0;

JTextField rTxt=new JTextField(5);

JTextField xField=new JTextField(5);

JTextField yField=new JTextField(5);

JButton paintBt=new JButton("畫");

JLabel huaban=new huaban();

JPanel jPanel=new JPanel();

JLabel banjingLabel,xLabel,yLabel;

public YuanYiDong(){

banjingLabel=new JLabel("半徑");

xLabel=new JLabel("X坐標");

yLabel=new JLabel("Y坐標");

this.setTitle("圓的移動");

this.setLocation(300,100);

this.setSize(500, 400);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

this.add(rTxt);

jPanel.setLayout(new FlowLayout());

add(huaban,BorderLayout.CENTER);

jPanel.add(banjingLabel);

jPanel.add(rTxt);

jPanel.add(xLabel);

jPanel.add(xField);

jPanel.add(yLabel);

jPanel.add(yField);

jPanel.add(paintBt);

add(jPanel,BorderLayout.NORTH);

paintBt.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

BANJIN=Integer.parseInt(rTxt.getText());

X=Integer.parseInt(xField.getText());

Y=Integer.parseInt(yField.getText());

huaban.repaint();

}

});

}

private void drawCirlce(Graphics g) {

g.setColor(Color.blue);

g.fillOval(X, Y, BANJIN,BANJIN);

}

public static void main(String[] args) {

YuanYiDong frame = new YuanYiDong();

}

public class huaban extends JLabel{

public huaban(){}

public void paint(Graphics g) {

Image image = createImage(getWidth(), getHeight());

drawCirlce(image.getGraphics());

g.drawImage(image, 0, 0, null);

}

}

}

給分吧！

編寫一個繪圖java 小程序,用戶點擊某一按鈕后,程序繪制相應(yīng)的圖形(如點擊"畫圓"，則繪制圓形）；

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

public class Tester extends Applet implements ActionListener

{

Button btn1,btn2,btn3,btn4;

public void init(){

setLayout(null);

btn1=new Button("繪制直線");

btn2=new Button("繪制矩形");

btn3=new Button("繪制圓");

add(btn1);

add(btn2);

add(btn3);

btn1.setBounds(10, 60, 60, 20);

btn2.setBounds(10, 90, 60, 20);

btn3.setBounds(10, 120, 60, 20);

btn1.addActionListener(this);

btn2.addActionListener(this);

btn3.addActionListener(this);

validate();

setVisible(true);

}

public void start(){

}

public void actionPerformed(ActionEvent e)

{

Graphics g=this.getGraphics();

if(e.getSource()==btn1)

{

g.drawLine(200, 100, 300, 200);

}

else if(e.getSource()==btn2)

{

g.drawRect(200, 250, 200, 200);

}

else

{

g.drawArc(200, 500, 200, 200, 0, 360);

}

}

}


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