混乱的Java语法
我正在尝试将以下代码（从）从Java转换为JavaScript：混乱的Java语法,java,javascript,arrays,syntax,maze,Java,Javascript,Arrays,Syntax,Maze,我正在尝试将以下代码（从）从Java转换为JavaScript： /* * 3 June 2003, [[:en:User:Cyp]]: * Maze, generated by my algorithm * 24 October 2006, [[:en:User:quin]]: * Source edited for clarity * 25 January 2009, [[:en:User:DebateG]]: * Source edited again
/*
* 3 June 2003, [[:en:User:Cyp]]:
* Maze, generated by my algorithm
* 24 October 2006, [[:en:User:quin]]:
* Source edited for clarity
* 25 January 2009, [[:en:User:DebateG]]:
* Source edited again for clarity and reusability
* 1 June 2009, [[:en:User:Nandhp]]:
* Source edited to produce SVG file when run from the command-line
*
* This program was originally written by [[:en:User:Cyp]], who
* attached it to the image description page for an image generated by
* it on en.wikipedia. The image was licensed under CC-BY-SA-3.0/GFDL.
*/
import java.awt.*;
import java.applet.*;
import java.util.Random;
/* Define the bit masks */
class Constants {
public static final int WALL_ABOVE = 1;
public static final int WALL_BELOW = 2;
public static final int WALL_LEFT = 4;
public static final int WALL_RIGHT = 8;
public static final int QUEUED = 16;
public static final int IN_MAZE = 32;
}
public class Maze extends java.applet.Applet {
/* The width and height (in cells) of the maze */
private int width;
private int height;
private int maze[][];
private static final Random rnd = new Random();
/* The width in pixels of each cell */
private int cell_width;
/* Construct a Maze with the default width, height, and cell_width */
public Maze() {
this(20,20,10);
}
/* Construct a Maze with specified width, height, and cell_width */
public Maze(int width, int height, int cell_width) {
this.width = width;
this.height = height;
this.cell_width = cell_width;
}
/* Initialization method that will be called when the program is
* run from the command-line. Maze will be written as SVG file. */
public static void main(String[] args) {
Maze m = new Maze();
m.createMaze();
m.printSVG();
}
/* Initialization method that will be called when the program is
* run as an applet. Maze will be displayed on-screen. */
public void init() {
createMaze();
}
/* The maze generation algorithm. */
private void createMaze(){
int x, y, n, d;
int dx[] = { 0, 0, -1, 1 };
int dy[] = { -1, 1, 0, 0 };
int todo[] = new int[height * width], todonum = 0;
/* We want to create a maze on a grid. */
maze = new int[width][height];
/* We start with a grid full of walls. */
for (x = 0; x < width; ++x) {
for (y = 0; y < height; ++y) {
if (x == 0 || x == width - 1 || y == 0 || y == height - 1) {
maze[x][y] = Constants.IN_MAZE;
} else {
maze[x][y] = 63;
}
}
}
/* Select any square of the grid, to start with. */
x = 1 + rnd.nextInt (width - 2);
y = 1 + rnd.nextInt (height - 2);
/* Mark this square as connected to the maze. */
maze[x][y] &= ~48;
/* Remember the surrounding squares, as we will */
for (d = 0; d < 4; ++d) {
if ((maze[][d][][d] & Constants.QUEUED) != 0) {
/* want to connect them to the maze. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[][d][][d] &= ~Constants.QUEUED;
}
}
/* We won't be finished until all is connected. */
while (todonum > 0) {
/* We select one of the squares next to the maze. */
n = rnd.nextInt (todonum);
x = todo[n] >> 16; /* the top 2 bytes of the data */
y = todo[n] & 65535; /* the bottom 2 bytes of the data */
/* We will connect it, so remove it from the queue. */
todo[n] = todo[--todonum];
/* Select a direction, which leads to the maze. */
do {
d = rnd.nextInt (4);
}
while ((maze[][d][][d] & Constants.IN_MAZE) != 0);
/* Connect this square to the maze. */
maze[x][y] &= ~((1 << d) | Constants.IN_MAZE);
maze[][d][][d] &= ~(1 << (d ^ 1));
/* Remember the surrounding squares, which aren't */
for (d = 0; d < 4; ++d) {
if ((maze[][d][][d] & Constants.QUEUED) != 0) {
/* connected to the maze, and aren't yet queued to be. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[][d][][d] &= ~Constants.QUEUED;
}
}
/* Repeat until finished. */
}
/* Add an entrance and exit. */
maze[1][1] &= ~Constants.WALL_ABOVE;
maze[width - 2][height - 2] &= ~Constants.WALL_BELOW;
}
/* Called by the applet infrastructure to display the maze on-screen. */
public void paint(Graphics g) {
drawMaze(g);
}
/* Called to write the maze to an SVG file. */
public void printSVG() {
System.out.format("<svg width=\"%d\" height=\"%d\" version=\"1.1\""
+ " xmlns=\"http://www.w3.org/2000/svg\">\n",
width*cell_width, height*cell_width);
System.out.println(" <g stroke=\"black\" stroke-width=\"1\""
+ " stroke-linecap=\"round\">");
drawMaze(null);
System.out.println(" </g>\n</svg>");
}
/* Main maze-drawing loop. */
public void drawMaze(Graphics g) {
int x, y;
for (x = 1; x < width - 1; ++x) {
for (y = 1; y < height - 1; ++y) {
if ((maze[x][y] & Constants.WALL_ABOVE) != 0)
drawLine( x * cell_width, y * cell_width,
(x + 1) * cell_width, y * cell_width, g);
if ((maze[x][y] & Constants.WALL_BELOW) != 0)
drawLine( x * cell_width, (y + 1) * cell_width,
(x + 1) * cell_width, (y + 1) * cell_width, g);
if ((maze[x][y] & Constants.WALL_LEFT) != 0)
drawLine( x * cell_width, y * cell_width,
x * cell_width, (y + 1) * cell_width, g);
if ((maze[x][y] & Constants.WALL_RIGHT) != 0)
drawLine((x + 1) * cell_width, y * cell_width,
(x + 1) * cell_width, (y + 1) * cell_width, g);
}
}
}
/* Draw a line, either in the SVG file or on the screen. */
public void drawLine(int x1, int y1, int x2, int y2, Graphics g) {
if ( g != null ) g.drawLine(x1, y1, x2, y2);
else System.out.format(" <line x1=\"%d\" y1=\"%d\""
+ " x2=\"%d\" y2=\"%d\" />\n", x1, y1, x2, y2);
}
}
/*
*2003年6月3日，[：en:User:Cyp]：
*迷宫，由我的算法生成
*2006年10月24日，[:en:User:quin]:
*为清晰起见，对源代码进行了编辑
*2009年1月25日，[：en:User:DebateG]：
*为了清晰和可重用，再次编辑源代码
*2009年6月1日，[:en:User:Nandhp]]：
*从命令行运行时编辑源代码以生成SVG文件
*
*这个程序最初是由[[：en:User:Cyp]]编写的
*将其附加到由生成的图像的图像描述页面
*它出现在维基百科上。该图像根据CC-BY-SA-3.0/GFDL获得许可。
*/
导入java.awt.*；
导入java.applet.*；
导入java.util.Random；
/*定义位掩码*/
类常数{
公共静态最终内墙=1；
公共静态最终内墙_=2；
公共静态最终内墙_左=4；
公共静态最终内墙（右=8）；
公共静态final int QUEUED=16；
_迷宫中的公共静态最终int=32；
}
公共类迷宫扩展了java.applet.applet{
/*迷宫的宽度和高度（以单元格为单位）*/
私有整数宽度；
私人内部高度；
私有int迷宫[]；
私有静态最终随机rnd=新随机（）；
/*每个单元格的宽度（以像素为单位）*/
专用int单元的宽度；
/*使用默认宽度、高度和单元格宽度构建迷宫*/
公共迷宫（）{
这（20,20,10）；
}
/*构建一个具有指定宽度、高度和单元格宽度的迷宫*/
公共迷宫（整数宽度、整数高度、整数单元格宽度）{
这个。宽度=宽度；
高度=高度；
this.cell\u width=cell\u width；
}
/*当程序运行时将调用的初始化方法
*从命令行运行。迷宫将作为SVG文件写入*/
公共静态void main（字符串[]args）{
迷宫m=新迷宫（）；
m、 createMaze（）；
m、 printSVG（）；
}
/*当程序运行时将调用的初始化方法
*作为小程序运行。迷宫将显示在屏幕上*/
公共void init（）{
createMaze（）；
}
/*迷宫生成算法*/
私有void createMaze（）{
int x，y，n，d；
int dx[]={0,0，-1,1}；
int dy[]={-1,1,0,0}；
int todo[]=新int[高度*宽度]，todonum=0；
/*我们想在网格上创建一个迷宫*/
迷宫=新的整数[宽度][高度]；
/*我们从满是墙的网格开始*/
对于（x=0；x
在我看来，有两组方括号太多的代码是错误的。maze
声明并初始化为二维int
数组。没有理由它应该有更多。可能是错误信息或错误代码生成器的结果
只需从数组访问中删除前面的空方括号[]
（或][
），您就可以进行设置。我有根据的猜测是缺少一些代码。删除额外的[]会使代码编译，但不会生成迷宫，而是陷入无限循环
我认为[][d][[d]应该是迷宫[x+dx[d][y+dy[d]]
很明显，d应该索引到dx和dy数组中，它们是当前单元格相邻区域的偏移量，通常迭代4次。另外todo[todonum++]=（（x+dx[d]）好的，下面是JavaScript版本：
/*
* 3 June 2003, [[:en:User:Cyp]]:
* Maze, generated by my algorithm
* 24 October 2006, [[:en:User:quin]]:
* Source edited for clarity
* 25 January 2009, [[:en:User:DebateG]]:
* Source edited again for clarity and reusability
* 1 June 2009, [[:en:User:Nandhp]]:
* Source edited to produce SVG file when run from the command-line
* 7 January, 2011 [[:en:User:SharkD]]:
* Source converted to JavaScript
*
* This program was originally written by [[:en:User:Cyp]], who
* attached it to the image description page for an image generated by
* it on en.wikipedia. The image was licensed under CC-BY-SA-3.0/GFDL.
*/
/* Recreate a math function that exists in Java but not JavaScript. */
Math.nextInt = function (number) {
return Math.floor(Math.random() * number)
}
/* Recreate a system function that exists in Java but not JavaScript.
* Uncomment either WScript.Echo() or alert() depending on whether you are
* running the script from the Windows command-line or a Web page.
*/
function println(string)
{
// if inside Windows Scripting Host
// WScript.Echo(string)
// if inside a Web page
alert(string)
}
/* Define the bit masks */
var Constants =
{
WALL_ABOVE : 1,
WALL_BELOW : 2,
WALL_LEFT : 4,
WALL_RIGHT : 8,
QUEUED : 16,
IN_MAZE : 32
}
/* Construct a Maze with specified width, height, and cell_width */
function Maze(width, height, cell_width) {
if (width)
this.width = width;
else
this.width = 20;
if (height)
this.height = height;
else
this.height = 20;
if (cell_width)
this.cell_width = cell_width;
else
this.cell_width = 10;
this.maze = []
/* The maze generation algorithm. */
this.createMaze = function() {
var width = this.width
var height = this.height
var maze = this.maze
var x, y, n, d;
var dx = [ 0, 0, -1, 1 ];
var dy = [ -1, 1, 0, 0 ];
var todo = new Array(height * width);
var todonum = 0;
/* We want to create a maze on a grid. */
/* We start with a grid full of walls. */
for (x = 0; x < width; ++x) {
maze[x] = []
for (y = 0; y < height; ++y) {
if (x == 0 || x == width - 1 || y == 0 || y == height - 1) {
maze[x][y] = Constants.IN_MAZE;
}
else {
maze[x][y] = 63;
}
}
}
/* Select any square of the grid, to start with. */
x = 1 + Math.nextInt(width - 2);
y = 1 + Math.nextInt(height - 2);
/* Mark this square as connected to the maze. */
maze[x][y] &= ~48;
/* Remember the surrounding squares, as we will */
for (d = 0; d < 4; ++d) {
if ((maze[x + dx[d]][y + dy[d]] & Constants.QUEUED) != 0) {
/* want to connect them to the maze. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[x + dx[d]][y + dy[d]] &= ~Constants.QUEUED;
}
}
/* We won't be finished until all is connected. */
while (todonum > 0) {
/* We select one of the squares next to the maze. */
n = Math.nextInt(todonum);
x = todo[n] >> 16; /* the top 2 bytes of the data */
y = todo[n] & 65535; /* the bottom 2 bytes of the data */
/* We will connect it, so remove it from the queue. */
todo[n] = todo[--todonum];
/* Select a direction, which leads to the maze. */
do {
d = Math.nextInt(4);
}
while ((maze[x + dx[d]][y + dy[d]] & Constants.IN_MAZE) != 0);
/* Connect this square to the maze. */
maze[x][y] &= ~((1 << d) | Constants.IN_MAZE);
maze[x + dx[d]][y + dy[d]] &= ~(1 << (d ^ 1));
/* Remember the surrounding squares, which aren't */
for (d = 0; d < 4; ++d) {
if ((maze[x + dx[d]][y + dy[d]] & Constants.QUEUED) != 0) {
/* connected to the maze, and aren't yet queued to be. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[x + dx[d]][y + dy[d]] &= ~Constants.QUEUED;
}
}
/* Repeat until finished. */
}
/* Add an entrance and exit. */
maze[1][1] &= ~Constants.WALL_ABOVE;
maze[width - 2][height - 2] &= ~Constants.WALL_BELOW;
}
/* Called to write the maze to an SVG file. */
this.printSVG = function () {
var outstring = "<svg width=\"" + (width * cell_width) + "\" height=\"" + (height*cell_width) + "\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n"
+ " <g stroke=\"black\" stroke-width=\"1\" stroke-linecap=\"round\">\n"
+ this.drawMaze()
+ " </g>\n</svg>\n";
println(outstring)
}
/* Main maze-drawing loop. */
this.drawMaze = function () {
var x, y;
var width = this.width;
var height = this.height;
var cell_width = this.cell_width
var outstring = ""
for (x = 1; x < width - 1; ++x) {
for (y = 1; y < height - 1; ++y) {
if ((this.maze[x][y] & Constants.WALL_ABOVE) != 0)
outstring += this.drawLine( x * cell_width, y * cell_width, (x + 1) * cell_width, y * cell_width);
if ((this.maze[x][y] & Constants.WALL_BELOW) != 0)
outstring += this.drawLine( x * cell_width, (y + 1) * cell_width, (x + 1) * cell_width, (y + 1) * cell_width);
if ((this.maze[x][y] & Constants.WALL_LEFT) != 0)
outstring += this.drawLine( x * cell_width, y * cell_width, x * cell_width, (y + 1) * cell_width);
if ((this.maze[x][y] & Constants.WALL_RIGHT) != 0)
outstring += this.drawLine((x + 1) * cell_width, y * cell_width, (x + 1) * cell_width, (y + 1) * cell_width);
}
}
return outstring
}
/* Draw a line, either in the SVG file or on the screen. */
this.drawLine = function (x1, y1, x2, y2) {
return " <line x1=\"" + x1 + "\" y1=\"" + y1 + "\" x2=\"" + x2 + "\" y2=\"" + y2 + "\" />\n";
}
}
/* Initialization method that will be called when the program is
* run from the command-line. Maze will be written as SVG file. */
function main(args) {
var m = new Maze();
m.createMaze();
m.printSVG();
}
/* execute the program */
main()
/*
*2003年6月3日，[：en:User:Cyp]：
*迷宫，由我的算法生成
*2006年10月24日，[:en:User:quin]:
*为清晰起见，对源代码进行了编辑
*2009年1月25日，[：en:User:DebateG]：
*为了清晰和可重用，再次编辑源代码
*2009年6月1日，[:en:User:Nandhp]]：
*从命令行运行时编辑源代码以生成SVG文件
*2011年1月7日[：en:User:SharkD]：
*源代码转换为JavaScript
*
*这个程序最初是由[[：en:User:Cyp]]编写的
*将其附加到由生成的图像的图像描述页面
*这张图片是根据CC-BY-SA-3.0/GFDL授权的。
*/
/*重新创建存在于Java中但不存在于JavaScript中的数学函数*/
Math.nextInt=函数（数字）{
返回Math.floor（Math.random（）*数字）
}
/*重新创建存在于Java中但不存在于JavaScript中的系统函数。
*取消注释WScript.Echo（）或alert（），具体取决于您是否
*从Windows命令行或网页运行脚本。
*/
函数println（字符串）
{
//如果在Windows脚本主机内
//Echo（字符串）
//如果在网页内
警报（字符串）
}
/*定义位掩码*/
变量常数=
{
上面的墙：1，
下面的墙：2，
左墙：4，
墙右：8，
排队人数：16人，
IN_迷宫：32
}
/*构建一个具有指定宽度、高度和单元格宽度的迷宫*/
功能迷宫（宽度、高度、单元宽度）{
如果（宽度）
这个。宽度=宽度；
其他的
这个宽度=20；
如果（高度）
高度=高度；
其他的
这个高度=20；
if（单元格宽度）
this.cell\u width=cell\u width；
其他的
该单元的宽度=10；
this.maze=[]
/*迷宫生成算法*/
this.createMaze=函数（）{
var width=this.width
var height=this.height
var maze=this.maze
变量x，y，n，d；
var dx=[0,0，-1,1]；
变量dy=[-1,1,0,0]；
var todo=新数组（高度*宽度）；
var-todonum=0；
/*我们想去cre
/*
* 3 June 2003, [[:en:User:Cyp]]:
* Maze, generated by my algorithm
* 24 October 2006, [[:en:User:quin]]:
* Source edited for clarity
* 25 January 2009, [[:en:User:DebateG]]:
* Source edited again for clarity and reusability
* 1 June 2009, [[:en:User:Nandhp]]:
* Source edited to produce SVG file when run from the command-line
* 7 January, 2011 [[:en:User:SharkD]]:
* Source converted to JavaScript
*
* This program was originally written by [[:en:User:Cyp]], who
* attached it to the image description page for an image generated by
* it on en.wikipedia. The image was licensed under CC-BY-SA-3.0/GFDL.
*/
/* Recreate a math function that exists in Java but not JavaScript. */
Math.nextInt = function (number) {
return Math.floor(Math.random() * number)
}
/* Recreate a system function that exists in Java but not JavaScript.
* Uncomment either WScript.Echo() or alert() depending on whether you are
* running the script from the Windows command-line or a Web page.
*/
function println(string)
{
// if inside Windows Scripting Host
// WScript.Echo(string)
// if inside a Web page
alert(string)
}
/* Define the bit masks */
var Constants =
{
WALL_ABOVE : 1,
WALL_BELOW : 2,
WALL_LEFT : 4,
WALL_RIGHT : 8,
QUEUED : 16,
IN_MAZE : 32
}
/* Construct a Maze with specified width, height, and cell_width */
function Maze(width, height, cell_width) {
if (width)
this.width = width;
else
this.width = 20;
if (height)
this.height = height;
else
this.height = 20;
if (cell_width)
this.cell_width = cell_width;
else
this.cell_width = 10;
this.maze = []
/* The maze generation algorithm. */
this.createMaze = function() {
var width = this.width
var height = this.height
var maze = this.maze
var x, y, n, d;
var dx = [ 0, 0, -1, 1 ];
var dy = [ -1, 1, 0, 0 ];
var todo = new Array(height * width);
var todonum = 0;
/* We want to create a maze on a grid. */
/* We start with a grid full of walls. */
for (x = 0; x < width; ++x) {
maze[x] = []
for (y = 0; y < height; ++y) {
if (x == 0 || x == width - 1 || y == 0 || y == height - 1) {
maze[x][y] = Constants.IN_MAZE;
}
else {
maze[x][y] = 63;
}
}
}
/* Select any square of the grid, to start with. */
x = 1 + Math.nextInt(width - 2);
y = 1 + Math.nextInt(height - 2);
/* Mark this square as connected to the maze. */
maze[x][y] &= ~48;
/* Remember the surrounding squares, as we will */
for (d = 0; d < 4; ++d) {
if ((maze[x + dx[d]][y + dy[d]] & Constants.QUEUED) != 0) {
/* want to connect them to the maze. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[x + dx[d]][y + dy[d]] &= ~Constants.QUEUED;
}
}
/* We won't be finished until all is connected. */
while (todonum > 0) {
/* We select one of the squares next to the maze. */
n = Math.nextInt(todonum);
x = todo[n] >> 16; /* the top 2 bytes of the data */
y = todo[n] & 65535; /* the bottom 2 bytes of the data */
/* We will connect it, so remove it from the queue. */
todo[n] = todo[--todonum];
/* Select a direction, which leads to the maze. */
do {
d = Math.nextInt(4);
}
while ((maze[x + dx[d]][y + dy[d]] & Constants.IN_MAZE) != 0);
/* Connect this square to the maze. */
maze[x][y] &= ~((1 << d) | Constants.IN_MAZE);
maze[x + dx[d]][y + dy[d]] &= ~(1 << (d ^ 1));
/* Remember the surrounding squares, which aren't */
for (d = 0; d < 4; ++d) {
if ((maze[x + dx[d]][y + dy[d]] & Constants.QUEUED) != 0) {
/* connected to the maze, and aren't yet queued to be. */
todo[todonum++] = ((x + dx[d]) << Constants.QUEUED) | (y + dy[d]);
maze[x + dx[d]][y + dy[d]] &= ~Constants.QUEUED;
}
}
/* Repeat until finished. */
}
/* Add an entrance and exit. */
maze[1][1] &= ~Constants.WALL_ABOVE;
maze[width - 2][height - 2] &= ~Constants.WALL_BELOW;
}
/* Called to write the maze to an SVG file. */
this.printSVG = function () {
var outstring = "<svg width=\"" + (width * cell_width) + "\" height=\"" + (height*cell_width) + "\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n"
+ " <g stroke=\"black\" stroke-width=\"1\" stroke-linecap=\"round\">\n"
+ this.drawMaze()
+ " </g>\n</svg>\n";
println(outstring)
}
/* Main maze-drawing loop. */
this.drawMaze = function () {
var x, y;
var width = this.width;
var height = this.height;
var cell_width = this.cell_width
var outstring = ""
for (x = 1; x < width - 1; ++x) {
for (y = 1; y < height - 1; ++y) {
if ((this.maze[x][y] & Constants.WALL_ABOVE) != 0)
outstring += this.drawLine( x * cell_width, y * cell_width, (x + 1) * cell_width, y * cell_width);
if ((this.maze[x][y] & Constants.WALL_BELOW) != 0)
outstring += this.drawLine( x * cell_width, (y + 1) * cell_width, (x + 1) * cell_width, (y + 1) * cell_width);
if ((this.maze[x][y] & Constants.WALL_LEFT) != 0)
outstring += this.drawLine( x * cell_width, y * cell_width, x * cell_width, (y + 1) * cell_width);
if ((this.maze[x][y] & Constants.WALL_RIGHT) != 0)
outstring += this.drawLine((x + 1) * cell_width, y * cell_width, (x + 1) * cell_width, (y + 1) * cell_width);
}
}
return outstring
}
/* Draw a line, either in the SVG file or on the screen. */
this.drawLine = function (x1, y1, x2, y2) {
return " <line x1=\"" + x1 + "\" y1=\"" + y1 + "\" x2=\"" + x2 + "\" y2=\"" + y2 + "\" />\n";
}
}
/* Initialization method that will be called when the program is
* run from the command-line. Maze will be written as SVG file. */
function main(args) {
var m = new Maze();
m.createMaze();
m.printSVG();
}
/* execute the program */
main()