求java做動畫代碼

import?java.awt.Canvas;

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import?java.awt.Color;

import?java.awt.Dimension;

import?java.awt.EventQueue;

import?java.awt.Frame;

import?java.awt.Graphics;

import?java.awt.Graphics2D;

import?java.awt.Image;

import?java.awt.RenderingHints;

import?java.awt.event.KeyEvent;

import?java.awt.event.KeyListener;

import?java.awt.event.WindowAdapter;

import?java.awt.event.WindowEvent;

import?java.awt.image.BufferedImage;

import?java.io.File;

import?java.io.IOException;

import?javax.imageio.ImageIO;

public?class?TestImage?extends?Frame

{

private?static?final?long?serialVersionUID?=?1L;

private?static?boolean?PRESSED?=?false;

private?static?int?pointX?=?0;

private?static?int?pointy?=?200;

private?static?int?RIGHT_GO?=?0;

private?static?int?LEFT_GO?=?0;

private?static?int?DIR?=?0;

private?static?int?ANGLE?=?0;

private?static?int?W?=?50;

private?static?int?H?=?60;

private?_Canvas?canvas?=?null;

public?TestImage?()

{

add?(canvas?=?new?_Canvas?());

setIgnoreRepaint?(true);

requestFocus?();

}

public?class?_Canvas?extends?Canvas?implements?Runnable

{

private?static?final?long?serialVersionUID?=?1L;

private?BufferedImage?bi?=?null;

private?Image?bufferedImage?=?null;

private?Thread?thread?=?null;

private?long?sleepTime?=?10;

public?_Canvas?()

{

try

{

bi?=?ImageIO.read?(new?File?("go.png"));

}

catch?(IOException?e)

{}

setBackground?(Color.BLACK);

requestFocus?();

addKeyListener?(new?KeyListener?()

{

@Override

public?void?keyTyped?(?KeyEvent?e?)

{}

@Override

public?void?keyReleased?(?KeyEvent?e?)

{

RIGHT_GO?=?0;

PRESSED?=?false;

}

@Override

public?void?keyPressed?(?KeyEvent?e?)

{

//?38?40?37?39上下左右

DIR?=?e.getKeyCode?();

PRESSED?=?true;

}

});

}

@Override

public?void?paint?(?Graphics?g?)

{

Graphics2D?g2d?=?(Graphics2D)?g;

g2d.setRenderingHint?(RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g2d.drawImage?(rotateImage?(bi.getSubimage?(RIGHT_GO,?LEFT_GO,?W,?H),?ANGLE,?true),?pointX,?pointy,?W,?H,

this);

g2d.dispose?();

}

@Override

public?void?update?(?Graphics?g?)

{

if?(null?==?bufferedImage)

{

bufferedImage?=?createImage?(getWidth?(),?getHeight?());

}

Graphics?bufferedG?=?bufferedImage.getGraphics?();

bufferedG.clearRect?(0,?0,?getWidth?(),?getHeight?());

paint?(bufferedG);

bufferedG.dispose?();

g.drawImage?(bufferedImage,?0,?0,?this);

g.dispose?();

}

public?void?start?()

{

thread?=?new?Thread?(this);

thread.setName?("TestImage");

thread.setPriority?(Thread.MIN_PRIORITY);

thread.start?();

}

public?synchronized?void?stop?()

{

thread?=?null;

notify?();

}

@Override

public?void?run?()

{

Thread?me?=?Thread.currentThread?();

while?(thread?==?me??!isShowing?()?||?getSize?().width?==?0)

{

try

{

Thread.sleep?(555);

}

catch?(InterruptedException?e)

{

return;

}

}

while?(thread?==?me??isShowing?())

{

if?(PRESSED)

{

try

{

if?(DIR?==?39)

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(pointX??420)

{

ANGLE?=?90;

pointX--;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?37)

{

pointX?=?pointX?-?1;

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?60;

if?(pointX??0)

{

ANGLE?=?-90;

pointX++;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?38)

{

W?=?50;

H?=?60;

pointy?=?150;

ANGLE?=?0;

RIGHT_GO?=?100;

}

else?if?(DIR?==?40)

{

W?=?50;

H?=?60;

ANGLE?=?0;

pointy?=?200;

RIGHT_GO?=?0;

}

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

else

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

if?(pointX??500)

{

pointX?=?0;

}

try

{

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

}

thread?=?null;

}

}

/**

?*?旋轉(zhuǎn)圖像為指定角度

?*?

?*?@param?degree

?*?@return

?*/

public?static?BufferedImage?rotateImage?(?final?BufferedImage?image,?final?int?angdeg,?final?boolean?d?)

{

int?w?=?image.getWidth?();

int?h?=?image.getHeight?();

int?type?=?image.getColorModel?().getTransparency?();

BufferedImage?img;

Graphics2D?graphics2d;

(?graphics2d?=?(?img?=?new?BufferedImage?(w,?h,?type)?).createGraphics?()?).setRenderingHint?(

RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

graphics2d.rotate?(d???-Math.toRadians?(angdeg)?:?Math.toRadians?(angdeg),?w?/?2,?h?/?2);

graphics2d.drawImage?(image,?0,?0,?null);

graphics2d.dispose?();

return?img;

}

public?static?void?main?(?String[]?args?)

{

EventQueue.invokeLater?(new?Runnable?()

{

@Override

public?void?run?()

{

final?TestImage?ti?=?new?TestImage?();

ti.setSize?(new?Dimension?(500,?300));

ti.setLocationRelativeTo?(null);

ti.addWindowListener?(new?WindowAdapter?()

{

@Override

public?void?windowClosing?(?WindowEvent?e?)

{

System.exit?(0);

}

@Override

public?void?windowDeiconified?(?WindowEvent?e?)

{

ti.canvas.start?();

}

@Override

public?void?windowIconified?(?WindowEvent?e?)

{

ti.canvas.stop?();

}

});

ti.setResizable?(false);

ti.canvas.start?();

ti.setVisible?(true);

}

});

}

}

java怎么把一段字符串當(dāng)做代碼來執(zhí)行

在javascript中eval()可以實現(xiàn)字符串轉(zhuǎn)代碼，java中需要使用動態(tài)編譯。

把獲得的字符串寫入一個臨時文件中，然后編譯它，在調(diào)用其中的函數(shù)。

我們把要轉(zhuǎn)換的字符串構(gòu)造一個完整的類:如果方法是有返回值的.則:

public object eval(string str){

//生成java文件

string s = "class temp{";

s += "object rt(){"

s += "myclass mc = new myclass();"

s += " return mc."+str+"();";

s += "}"

s +="}";

file f = new file("temp.java");

printwriter pw = new printwriter(new filewriter(f));

pw.println(s);

pw.close();

//動態(tài)編譯

com.sun.tools.javac.main javac = new com.sun.tools.javac.main();

string[] cpargs = new string[] {"-d", "所在目錄","temp.java"};

int status = javac.compile(cpargs);

if(status!=0){

system.out.println("沒有成功編譯源文件!");

return null;

}

//調(diào)用temp的rt方法返回結(jié)果:

myclassloader mc = new myclassloader();

class clasz = mc.loadclass("test.class",true);

method rt = clasz.getmethod("rt", new class[]{ string[].class });

return rt.invoke(null, new object[] { new string[0] });

//如果方法沒有返回就直接調(diào)用

}

我們可以先寫好多個重載的eval,有返回值和沒有返回值的.以及可以傳遞參數(shù)的.

這樣我們就可以用字符串轉(zhuǎn)換為java的語句來執(zhí)行.

怎么樣用Java實現(xiàn)將一張圖片轉(zhuǎn)成字符畫？？

#首先在D盤寫一個文件"temp.html"，如下內(nèi)容

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

html

head

title圖片轉(zhuǎn)文本/title

meta http-equiv="content-type" content="text/html; charset=gbk"

style type="text/css"

body {

font-family: 宋體; line-height: 0.8em; letter-spacing: 0px; font-size: 8px;

}

/style

/head

body

${content}

/body

/html

#在D盤放一個圖片（放小一點的）"a.jpg"

#運行如下JAVA代碼：

import java.awt.Color;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import javax.imageio.ImageIO;

public class Test {

/** 此處設(shè)置灰度字符，此處只用十個字符，可以設(shè)置更多 */

private static char[] cs = new char[] { '.', ',', '*', '+', '=', '', '$', '@', '#', ' ' };

public static void main(String[] args) throws IOException {

// 讀取圖片

BufferedImage bfedimage = ImageIO.read(new File("D:\\a.jpg"));

// 圖片轉(zhuǎn)字符串后的數(shù)組

char[][] css = new char[bfedimage.getWidth()][bfedimage.getHeight()];

for (int x = 0; x bfedimage.getWidth(); x++) {

for (int y = 0; y bfedimage.getHeight(); y++) {

int rgb = bfedimage.getRGB(x, y);

Color c = new Color(rgb);

// 得到灰度值

int cc = (c.getRed() + c.getGreen() + c.getBlue()) / 3;

css[x][y] = cs[(int) ((cc * 10 - 1) / 255)];

}

}

// 取得模板HTML

String temp = readFile(new File("D:\\temp.html"),"gbk");

StringBuffer sb = new StringBuffer();

// 開始拼接內(nèi)容

for (int y = 0; y css[0].length; y++) {

for (int x = 0; x css.length; x++) {

sb.append(css[x][y]);

}

sb.append("\r\n");

}

System.out.println(sb.toString());

// 生成文件

String content = toHTML(sb.toString());

String filecontent = replaceStrAllNotBack(temp, "${content}", content);

writeFile(new File("D:\\content.html"), filecontent, "gbk");

}

public static String toHTML(String s) {

s = s.replaceAll("", "");

s = s.replaceAll(" ", "?");

s = s.replaceAll("", "");

s = s.replaceAll("", "");

s = s.replaceAll("\"", """);

s = s.replaceAll("\\\r\\\n", "br/");

s = s.replaceAll("\\\r", "br/");

s = s.replaceAll("\\\n", "br/");

return s;

}

public static String replaceStrAllNotBack(String str, String strSrc, String strDes) {

StringBuffer sb = new StringBuffer(str);

int index = 0;

while ((index = sb.indexOf(strSrc, index)) != -1) {

sb.replace(index, index + strSrc.length(), strDes);

index += strDes.length();

}

return sb.toString();

}

/**

* 讀文件(使用默認(rèn)編碼)

*

* @param file

* @return 文件內(nèi)容

* @throws IOException

*/

public static String readFile(File file, String charset) throws IOException {

InputStreamReader fr = new InputStreamReader(new FileInputStream(file), charset);

StringBuffer sb = new StringBuffer();

char[] bs = new char[1024];

int i = 0;

while ((i = fr.read(bs)) != -1) {

sb.append(bs, 0, i);

}

fr.close();

return sb.toString();

}

/**

* 寫文件

*

* @param file

* @param string

* 字符串

* @param encoding

* 編碼

* @return 文件大小

* @throws IOException

*/

public static int writeFile(File file, String string, String encoding) throws IOException {

FileOutputStream fos = new FileOutputStream(file);

try {

byte[] bs = string.getBytes(encoding);

fos.write(bs);

return bs.length;

} finally {

fos.close();

}

}

}

#打開"D:\content.html"文件看效果吧。

有什么問題可以聯(lián)系我。

如何用java窗體實現(xiàn)一個字符串動畫效果?

建立循環(huán)改變字符串內(nèi)容 并用repain（）方法刷新窗體內(nèi)容，用每次循環(huán)修改后的字符串替代上次刷新的字符串 即可時間字符串動畫 望樓主采納

新聞標(biāo)題：java動態(tài)字符畫代碼 java動態(tài)創(chuàng)建字符串?dāng)?shù)組
轉(zhuǎn)載源于：http://chinadenli.net/article6/doediig.html

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