我试图让我的Zombie在我制作的地图中使用（使用按键）（使用扫描仪和文件阅读器），但它只是生育然后坐在那里。我仍然有更多的代码要做，因为程序没有完成但我不能做任何其他事情，直到僵尸移动。在此先感谢您的帮助！
PS。 EZ是一个多媒体库，旨在使新手程序员更容易快速构建包含图形和声音的Java应用程序。它在马诺阿的UH Hawaii使用。
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M M
M B M
M B B M
M M
M M M
M M M M
M M WWW M
M WWWW B M
M M M
M M M
M B M
M B M
M WWWWWW M
M M M
M B M M
M M M
M M B M
M M M
M WWWWWWW M
M M M
M M B M
M B B M
M M
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僵尸
public class Zombie {
EZImage zombieSheet;
int x = 0; // Position of Sprite
int y = 0;
int zombieWidth; // Width of each sprite
int zombieHeight; // Height of each sprite
int direction = 0; // Direction character is walking in
int walkSequence = 0; // Walk sequence counter
int cycleSteps; // Number of steps before cycling to next animation step
int counter = 0; // Cycle counter
Zombie(String imgFile, int startX, int startY, int width, int height, int steps) {
x = startX; // position of the sprite character on the screen
y = startY;
zombieWidth = width; // Width of the sprite character
zombieHeight = height; // Height of the sprite character
cycleSteps = steps; // How many pixel movement steps to move before changing the sprite graphic
zombieSheet = EZ.addImage(imgFile, x, y);
setImagePosition();
}
private void setImagePosition() {
// Move the entire sprite sheet
zombieSheet.translateTo(x, y);
// Show only a portion of the sprite sheet.
// Portion is determined by setFocus which takes 4 parameters:
// The 1st two numbers is the top left hand corner of the focus region.
// The 2nd two numbers is the bottom right hand corner of the focus region.
zombieSheet.setFocus(walkSequence * zombieWidth, direction, walkSequence * zombieWidth + zombieWidth, direction + zombieHeight);
}
public void moveDown(int stepSize) {
y = y + stepSize;
direction = 0;
if ((counter % cycleSteps) == 0) {
walkSequence++;
if (walkSequence > 3)
walkSequence = 0;
}
counter++;
setImagePosition();
}
public void moveLeft(int stepSize) {
x = x - stepSize;
direction = zombieHeight;
if ((counter % cycleSteps) == 0) {
walkSequence--;
if (walkSequence < 0)
walkSequence = 3;
}
counter++;
setImagePosition();
}
public void moveRight(int stepSize) {
x = x + stepSize;
direction = zombieHeight * 2;
if ((counter % cycleSteps) == 0) {
walkSequence++;
if (walkSequence > 3)
walkSequence = 0;
}
counter++;
setImagePosition();
}
public void moveUp(int stepSize) {
y = y - stepSize;
direction = zombieHeight * 3;
if ((counter % cycleSteps) == 0) {
walkSequence--;
if (walkSequence < 0)
walkSequence = 3;
}
setImagePosition();
counter++;
}
// Keyboard controls for moving the character.
public void go() {
if (EZInteraction.isKeyDown('w')) {
moveUp(2);
} else if (EZInteraction.isKeyDown('a')) {
moveLeft(2);
} else if (EZInteraction.isKeyDown('s')) {
moveDown(2);
} else if (EZInteraction.isKeyDown('d')) {
moveRight(2);
}
}
}
ZombieMain
import java.awt.Color;
import java.io.FileReader;
import java.util.Scanner;
public class ZombieMain {
static EZImage[] walls = new EZImage[500];
static EZImage[] sideWalls = new EZImage[500];
static EZImage[] brains = new EZImage[50];
static int wallsCount = 0;
static int sideWallsCount = 0;
static int brainsCount = 0;
public static void main(String[] args) throws java.io.IOException {
//initialize scanner
Scanner fScanner = new Scanner(new FileReader("boundaries.txt"));
int w = fScanner.nextInt();
int h = fScanner.nextInt();
String inputText = fScanner.nextLine();
//create backdrop
EZ.initialize(w * 33, h * 32);
EZ.setBackgroundColor(new Color(0, 0, 0));
Zombie me = new Zombie("zombieSheet.png", 650, 450, 48, 58, 10);
//set reading parameters and establish results of case readings
for (int row = 0; row < 41; row++) {
inputText = fScanner.nextLine();
for (int column = 0; column < inputText.length(); column++) {
char ch = inputText.charAt(column);
switch (ch) {
case 'W':
walls[wallsCount] = EZ.addImage("barbwire.jpg", column * 32, row * 32);
wallsCount++;
break;
case 'M':
sideWalls[wallsCount] = EZ.addImage("barb.jpg", column * 32, row * 32);
wallsCount++;
break;
case 'B':
brains[brainsCount] = EZ.addImage("brains.png", column * 32, row * 32);
brainsCount++;
break;
default:
// Do nothing
break;
}
//printed count of walls, side walls, and brains
System.out.println("W = " + wallsCount);
System.out.println("M = " + sideWallsCount);
System.out.println("B = " + brainsCount);
}
}
fScanner.close();
while (true) {
me.go();
EZ.refreshScreen();
}
}
}
答案 0 :(得分：0)
好的，明白了。
使用for循环来迭代文本文件和地图。您的for循环假定您的地图文件正好有41行。它没有，因此扫描程序在到达循环外时会抛出异常。
通常，假设读取文件时固定大小是一个不好的解决方案。你应该做的是使用某种方法（通常由这些读者提供）来检查你是否还没有到达终点，并使用while循环。由于您无论如何都需要行号，因此您需要为其保留一个单独的计数器，并在每个while循环传递中递增它。
对于扫描仪，您正在寻找的方法是fScanner.hasNext()，因此您的代码将如下所示：
int row = 0;
//set reading parameters and establish results of case readings
while (fScanner.hasNext()) {
...
row++;
}