java简单图形代码 java图形界面设计代码

求一计算器java代码，最好简单一点（图形界面）

import java.awt.*;

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import java.awt.event.*;

import java.lang.*;

import javax.swing.*;

public class Counter extends Frame

{

//声明三个面板的布局

GridLayout gl1,gl2,gl3;

Panel p0,p1,p2,p3;

JTextField tf1;

TextField tf2;

Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;

StringBuffer str;//显示屏所显示的字符串

double x,y;//x和y都是运算数

int z;/哪基/Z表示单击了那一个运算符.0表示"+",1表示"-",2表示"*",3表示"/"

static double m;//记忆的数字

public Counter()

{

gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局

gl2=new GridLayout(4,1,0,15);

gl3=new GridLayout(4,5,10,15);

tf1=new JTextField(27);//显示屏

tf1.setHorizontalAlignment(JTextField.RIGHT);

tf1.setEnabled(false);

tf1.setText("0");

tf2=new TextField(10);//显示记忆的索引值

tf2.setEditable(false);

//实例化所有按钮、设置其前景色并注册监听器

b0=new Button("Backspace");

b0.setForeground(Color.red);

b0.addActionListener(new Bt());

b1=new Button("CE");

b1.setForeground(Color.red);

b1.addActionListener(new Bt());

b2=new Button("C");

b2.setForeground(Color.red);

b2.addActionListener(new Bt());

b3=new Button("MC");

b3.setForeground(Color.red);

b3.addActionListener(new Bt());

b4=new Button("李逗谨MR");

b4.setForeground(Color.red);

b4.addActionListener(new Bt());

b5=new Button("MS");

b5.setForeground(Color.red);

b5.addActionListener(new Bt());

b6=new Button("M+");

b6.setForeground(Color.red);

b6.addActionListener(new Bt());

b7=new Button("7");

b7.setForeground(Color.blue);

b7.addActionListener(new Bt());

b8=new Button("8");

b8.setForeground(Color.blue);

b8.addActionListener(new Bt());

b9=new Button("9");

b9.setForeground(Color.blue);

b9.addActionListener(new Bt());

b10=new Button("/"指铅);

b10.setForeground(Color.red);

b10.addActionListener(new Bt());

b11=new Button("sqrt");

b11.setForeground(Color.blue);

b11.addActionListener(new Bt());

b12=new Button("4");

b12.setForeground(Color.blue);

b12.addActionListener(new Bt());

b13=new Button("5");

b13.setForeground(Color.blue);

b13.addActionListener(new Bt());

b14=new Button("6");

b14.setForeground(Color.blue);

b14.addActionListener(new Bt());

b15=new Button("*");

b15.setForeground(Color.red);

b15.addActionListener(new Bt());

b16=new Button("%");

b16.setForeground(Color.blue);

b16.addActionListener(new Bt());

b17=new Button("1");

b17.setForeground(Color.blue);

b17.addActionListener(new Bt());

b18=new Button("2");

b18.setForeground(Color.blue);

b18.addActionListener(new Bt());

b19=new Button("3");

b19.setForeground(Color.blue);

b19.addActionListener(new Bt());

b20=new Button("-");

b20.setForeground(Color.red);

b20.addActionListener(new Bt());

b21=new Button("1/X");

b21.setForeground(Color.blue);

b21.addActionListener(new Bt());

b22=new Button("0");

b22.setForeground(Color.blue);

b22.addActionListener(new Bt());

b23=new Button("+/-");

b23.setForeground(Color.blue);

b23.addActionListener(new Bt());

b24=new Button(".");

b24.setForeground(Color.blue);

b24.addActionListener(new Bt());

b25=new Button("+");

b25.setForeground(Color.red);

b25.addActionListener(new Bt());

b26=new Button("=");

b26.setForeground(Color.red);

b26.addActionListener(new Bt());

//实例化四个面板

p0=new Panel();

p1=new Panel();

p2=new Panel();

p3=new Panel();

//创建一个空字符串缓冲区

str=new StringBuffer();

//添加面板p0中的组件和设置其在框架中的位置和大小

p0.add(tf1);

p0.setBounds(10,25,300,40);

//添加面板p1中的组件和设置其在框架中的位置和大小

p1.setLayout(gl1);

p1.add(tf2);

p1.add(b0);

p1.add(b1);

p1.add(b2);

p1.setBounds(10,65,300,25);

//添加面板p2中的组件并设置其的框架中的位置和大小

p2.setLayout(gl2);

p2.add(b3);

p2.add(b4);

p2.add(b5);

p2.add(b6);

p2.setBounds(10,110,40,150);

//添加面板p3中的组件并设置其在框架中的位置和大小

p3.setLayout(gl3);//设置p3的布局

p3.add(b7);

p3.add(b8);

p3.add(b9);

p3.add(b10);

p3.add(b11);

p3.add(b12);

p3.add(b13);

p3.add(b14);

p3.add(b15);

p3.add(b16);

p3.add(b17);

p3.add(b18);

p3.add(b19);

p3.add(b20);

p3.add(b21);

p3.add(b22);

p3.add(b23);

p3.add(b24);

p3.add(b25);

p3.add(b26);

p3.setBounds(60,110,250,150);

//设置框架中的布局为空布局并添加4个面板

setLayout(null);

add(p0);

add(p1);

add(p2);

add(p3);

setResizable(false);//禁止调整框架的大小

//匿名类关闭窗口

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e1)

{

System.exit(0);

}

});

setBackground(Color.lightGray);

setBounds(100,100,320,280);

setVisible(true);

}

//构造监听器

class Bt implements ActionListener

{

public void actionPerformed(ActionEvent e2)

{

try{

if(e2.getSource()==b1)//选择"CE"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数

}

else if(e2.getSource()==b2)//选择"C"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);

}

else if(e2.getSource()==b23)//单击"+/-"选择输入的运算数是正数还是负数

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(-x));

}

else if(e2.getSource()==b25)//单击加号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);//清空缓冲区以便接收新的另一个运算数

y=0d;

z=0;

}

else if(e2.getSource()==b20)//单击减号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=1;

}

else if(e2.getSource()==b15)//单击乘号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=2;

}

else if(e2.getSource()==b10)//单击除号按钮获得x的值和z的值并空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=3;

}

else if(e2.getSource()==b26)//单击等号按钮输出计算结果

{

str.setLength(0);

switch(z)

{

case 0 : tf1.setText(""+(x+y));break;

case 1 : tf1.setText(""+(x-y));break;

case 2 : tf1.setText(""+(x*y));break;

case 3 : tf1.setText(""+(x/y));break;

}

}

else if(e2.getSource()==b24)//单击"."按钮输入小数

{

if(tf1.getText().trim().indexOf(′.′)!=-1)//判断字符串中是否已经包含了小数点

{

}

else//如果没数点有小

{

if(tf1.getText().trim().equals("0"))//如果初时显示为0

{

str.setLength(0);

tf1.setText((str.append("0"+e2.getActionCommand())).toString());

}

else if(tf1.getText().trim().equals(""))//如果初时显示为空则不做任何操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

}

}

y=0d;

}

else if(e2.getSource()==b11)//求平方根

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText("数字格式异常");

if(x0)

tf1.setText("负数没有平方根");

else

tf1.setText(""+Math.sqrt(x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b16)//单击了"%"按钮

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(0.01*x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b21)//单击了"1/X"按钮

{

x=Double.parseDouble(tf1.getText().trim());

if(x==0)

{

tf1.setText("除数不能为零");

}

else

{

tf1.setText(""+(1/x));

}

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b3)//MC为清除内存

{

m=0d;

tf2.setText("");

str.setLength(0);

}

else if(e2.getSource()==b4)//MR为重新调用存储的数据

{

if(tf2.getText().trim()!="")//有记忆数字

{

tf1.setText(""+m);

}

}

else if(e2.getSource()==b5)//MS为存储显示的数据

{

m=Double.parseDouble(tf1.getText().trim());

tf2.setText("M");

tf1.setText("0");

str.setLength(0);

}

else if(e2.getSource()==b6)//M+为将显示的数字与已经存储的数据相加要查看新的数字单击MR

{

m=m+Double.parseDouble(tf1.getText().trim());

}

else//选择的是其他的按钮

{

if(e2.getSource()==b22)//如果选择的是"0"这个数字键

{

if(tf1.getText().trim().equals("0"))//如果显示屏显示的为零不做操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

else if(e2.getSource()==b0)//选择的是“BackSpace”按钮

{

if(!tf1.getText().trim().equals("0"))//如果显示屏显示的不是零

{

if(str.length()!=1)

{

tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能抛出字符串越界异常

}

else

{

tf1.setText("0");

str.setLength(0);

}

}

y=Double.parseDouble(tf1.getText().trim());

}

else//其他的数字键

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

}

catch(NumberFormatException e){

tf1.setText("数字格式异常");

}

catch(StringIndexOutOfBoundsException e){

tf1.setText("字符串索引越界");

}

}

}

public static void main(String args[])

{

new Counter();

}

}

JAVA的图形用户界面代码

package hao;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.GridLayout;

import java.io.File;

import javax.swing.BorderFactory;

import javax.swing.Box;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextPane;

import javax.swing.text.BadLocationException;

import javax.swing.text.SimpleAttributeSet;

import javax.swing.text.StyleConstants;

import javax.swing.text.StyledDocument;

public class ChatPanel extends JPanel {

private static final long serialVersionUID = 1L;

JButton send,record,saveRecord,image;

JTextArea inputArea;

JTextPane text;//注意用法****************************************************************************

JComboBox fontName = null, fontSize = null, fontStyle = null, fontColor = null,fontBackColor = null;

public StyledDocument doc = null; JScrollPane scrollPane;JPanel textChat;

JButton music;

public ChatPanel() {

setLayout(new BorderLayout());

text = new JTextPane();

text.setEditable(false);

doc = text.getStyledDocument();/搏搜/跟踪文本和图片写到该区域的位置*************************************

scrollPane = new JScrollPane(text);

//注意下面对JComboBox的巧用***********************************************************************

String[] str_name = { "宋体"陆逗, "黑体", "Dialog", "Gulim" };

String[] str_Size = { "12", "14", "18", "22", "30", "40" };

String[] str_Style = { "常规", "斜体", "粗体", "粗斜体" };

String[] str_Color = { "黑色", "红色", "蓝色", "黄色", "绿色" };

String[] str_BackColor = { "无色", "灰色", "淡红基悉历", "淡蓝", "淡黄", "淡绿" };

fontName = new JComboBox(str_name);

fontSize = new JComboBox(str_Size);

fontStyle = new JComboBox(str_Style);

fontColor = new JComboBox(str_Color);

fontBackColor = new JComboBox(str_BackColor);

fontName.setBackground(new Color(255,153,255));

fontSize.setBackground(new Color(255,153,255));

fontStyle.setBackground(new Color(255,153,255));

fontColor.setBackground(new Color(255,153,255));

fontBackColor.setBackground(new Color(255,153,255));

Box box = Box.createVerticalBox();//创建一个可以容纳多个Box组件的Box*******************************

Box box_1 = Box.createHorizontalBox();

Box box_2 = Box.createHorizontalBox();

Box box_4 = Box.createHorizontalBox();

box.add(box_1);

box.add(box_2);

box.add(box_4);

JLabel b1= new JLabel("字体~~"), b2 = new JLabel("样式~~"),b3 = new JLabel("字号~~"),b4 = new JLabel("颜色~~"),b5 = new JLabel("背景~~");

b1.setBackground(new Color(255,153,255));

b2.setBackground(new Color(255,153,255));

b3.setBackground(new Color(255,153,255));

b4.setBackground(new Color(255,153,255));

b5.setBackground(new Color(255,153,255));

box_1.add(b1);

box_1.add(fontName);

box_1.add(Box.createHorizontalStrut(8));

box_1.add(b2);

box_1.add(fontStyle);

box_1.add(Box.createHorizontalStrut(8));

box_1.add(b3);

box_1.add(fontSize);

box_2.add(Box.createHorizontalStrut(8));

box_2.add(b4);

box_2.add(fontColor);

box_2.add(Box.createHorizontalStrut(8));

box_4.add(b5);

box_4.add(fontBackColor);

textChat = new JPanel();

textChat.setLayout(new BorderLayout());

textChat.setBackground(new Color(255,153,255));

inputArea = new JTextArea(3, 20);

inputArea.setLineWrap(true); //设置文本区的换行策略。88888*********************************

send = new JButton("发送");

record=new JButton("显示记录");

saveRecord=new JButton("储存记录");

image=new JButton("表情");

send.setBackground(new Color(255,153,255));

record.setBackground(new Color(255,153,255));

saveRecord.setBackground(new Color(255,153,255));

image.setBackground(new Color(255,153,255));

Box box_3 = Box.createHorizontalBox();

box_3.add(send); box_3.add(Box.createHorizontalStrut(8));//设置按钮间距*************************888

box_3.add(record); box_3.add(Box.createHorizontalStrut(8)); //设置按钮间距*************************888

box_3.add(saveRecord); box_3.add(Box.createHorizontalStrut(8));//设置按钮间距*************************888

box_3.add(image);

box.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));//设置Box的边框线********************

box_3.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));

textChat.add(box,BorderLayout.NORTH);

textChat.add(inputArea,BorderLayout.CENTER);

textChat.add(box_3, BorderLayout.SOUTH);

inputArea.requestFocus(true);

inputArea.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));//设置输入窗口边框线*******************

text.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),8));//设置输入窗口边框线*******************

JPanel audioPanel = new JPanel();//最上面的边框************************************************************************

audioPanel.setBackground(new Color(255,153,255));

audioPanel.setLayout(new GridLayout(1,1));

music = new JButton("想听就听");

music.setPreferredSize(new Dimension(320,50));

music.setBorder(BorderFactory.createLineBorder(Color.BLACK,10));//设置输入窗口边框线*******************

audioPanel.add(music);

add(audioPanel, BorderLayout.NORTH);

add(scrollPane,BorderLayout.CENTER);

add(textChat, BorderLayout.SOUTH);

}

void insertIcon(ImageIcon image) {

text.setCaretPosition(doc.getLength());

text.insertIcon(image);

insert(new MessageStyle());//?????????????????????????????????????????????????????????????????????????????/

}

public void insert(MessageStyle attrib) {

try {

doc.insertString(doc.getLength(), attrib.getText() + "\n", attrib.getAttrSet());//写完后接着换行************

} catch (BadLocationException e) {

e.printStackTrace();

}

}

public MessageStyle getMessageStyle(String line) {

MessageStyle att = new MessageStyle();

att.setText(line);

att.setName((String) fontName.getSelectedItem());

att.setSize(Integer.parseInt((String) fontSize.getSelectedItem()));

String temp_style = (String) fontStyle.getSelectedItem();

if (temp_style.equals("常规")) {

att.setStyle(MessageStyle.GENERAL);

}

else if (temp_style.equals("粗体")) {

att.setStyle(MessageStyle.BOLD);

}

else if (temp_style.equals("斜体")) {

att.setStyle(MessageStyle.ITALIC);

}

else if (temp_style.equals("粗斜体")) {

att.setStyle(MessageStyle.BOLD_ITALIC);

}

String temp_color = (String) fontColor.getSelectedItem();

if (temp_color.equals("黑色")) {

att.setColor(new Color(0, 0, 0));

}

else if (temp_color.equals("红色")) {

att.setColor(new Color(255, 0, 0));

}

else if (temp_color.equals("蓝色")) {

att.setColor(new Color(0, 0, 255));

}

else if (temp_color.equals("黄色")) {

att.setColor(new Color(255, 255, 0));

}

else if (temp_color.equals("绿色")) {

att.setColor(new Color(0, 255, 0));

}

String temp_backColor = (String) fontBackColor.getSelectedItem();

if (!temp_backColor.equals("无色")) {

if (temp_backColor.equals("灰色")) {

att.setBackColor(new Color(200, 200, 200));

}

else if (temp_backColor.equals("淡红")) {

att.setBackColor(new Color(255, 200, 200));

}

else if (temp_backColor.equals("淡蓝")) {

att.setBackColor(new Color(200, 200, 255));

}

else if (temp_backColor.equals("淡黄")) {

att.setBackColor(new Color(255, 255, 200));

}

else if (temp_backColor.equals("淡绿")) {

att.setBackColor(new Color(200, 255, 200));

}

}

return att;

}

}

用JAVA写一个简单图形类

public class Test013 {

/**

* 编写液樱一个图形类MyGraphic。 1）它有两个基本属性：图形线条的颜色String lineColor和图形的填充颜色String

* fillColor。 2）设计矩形类CRectangle，有属性double rLong和宽double rWidth， 使用方法 float

* calCircum()可以返回矩形的周长，使用方法float calSquare()可以返回矩形的面积。

* 编写方法show()，显示图形的线条颜色和填充颜色，输出面积和方法。 3）设计圆形类CCircle,定义属性：半径double

* radius，可以通过同名方法计算周长和面积。 编写方法show()，显示图形的线条颜色和填充颜色，输出面积和方法。

* 4）编写出应用程序对CRectangle类和CCircle类进行验闹吵丛证。 完成上述要求即可

*/

public static void main(String[] args) {

MyGraphic rectangle = new CRectangle(10, 5);

rectangle.setFillColor("紫色"); //设定矩形填充颜色

rectangle.setLineColor("白色"); //设定矩形线条颜色

rectangle.show();

System.out.println("矩形周长 = " + rectangle.calCircum());

System.out.println("矩形面积 = " + rectangle.calSquare());

MyGraphic circle = new CCircle(3);

circle.setFillColor("红色");

circle.setLineColor("黄色");

circle.show();

System.out.println("园形周长 = " + circle.calCircum());

System.out.println("园形面积 = " + circle.calSquare());

}

}

/**

* 图形类

*

*/

abstract class MyGraphic {

private String lineColor; // 图形线条的颜色

private String fillColor; // 图形的填充颜色

public String getLineColor() {

return lineColor;

}

public void setLineColor(String lineColor) {

this.lineColor = lineColor;

}

public String getFillColor() {

return fillColor;

}

public void setFillColor(String fillColor) {

this.fillColor = fillColor;

}

public MyGraphic(String lineColor, String fillColor) {

this.lineColor = lineColor;

this.fillColor = fillColor;

}

public MyGraphic() {

}

/**

* 显示图碰明形的颜色

*/

public abstract void show();

/**

* 计算图形的周长

*/

public abstract float calCircum();

/**

* 计算图形的面积

*/

public abstract float calSquare();

}

/**

* 矩形类

*

*/

class CRectangle extends MyGraphic {

private double rLong; // 长

private double rWidth; // 宽

/**

* 通过构造函数为图形的属性赋值

*

* @param rLong

* @param rWidth

*/

public CRectangle(double rLong, double rWidth) {

this.rLong = rLong;

this.rWidth = rWidth;

}

/**

* @return 矩形的周长

*/

@Override

public float calCircum() {

return (float) (2 * (rLong + rWidth));

}

/**

* @return 矩形的面积

*/

@Override

public float calSquare() {

return (float) (rLong * rWidth);

}

@Override

public void show() {

System.out.println("矩形线条的颜色: " + super.getLineColor());

System.out.println("矩形填充颜色: " + super.getFillColor());

}

public double getrLong() {

return rLong;

}

public void setrLong(double rLong) {

this.rLong = rLong;

}

public double getrWidth() {

return rWidth;

}

public void setrWidth(double rWidth) {

this.rWidth = rWidth;

}

}

/**

* 圆形类

*

*/

class CCircle extends MyGraphic {

private double radius; // 圆形半径

public CCircle(double radius) {

this.radius = radius;

}

/**

* @return 圆形的周长

*/

@Override

public float calCircum() {

return (float) (2 * Math.PI * radius);

}

/**

* @return 圆形的面积

*/

@Override

public float calSquare() {

return (float) (Math.PI * radius * radius);

}

@Override

public void show() {

System.out.println("圆形线条的颜色: " + super.getLineColor());

System.out.println("圆形填充颜色: " + super.getFillColor());

}

public double getRadius() {

return radius;

}

public void setRadius(double radius) {

this.radius = radius;

}

}

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，就槐拿陪是你要的画图功能

____________________________________________________________________

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）铅蠢；（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;

// *工具面板敏型--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"); }

}