我似乎無法弄清楚有什麼不對或爲什麼它給我它的輸出,我會複製&粘貼我的代碼爲兩個類和我得到的控制檯輸出,也許有人比我更好在Java可以幫助想出解決辦法,我敢肯定這件事情簡單:
一流ArrayIndexOutOfBounds異常Java
public class PoolTest {
public static void main(String args[]){
Pool newPool = new Pool();
System.out.println(newPool.getValue('q'));
System.out.println(newPool.getTiles(10));
newPool.poolReset();
System.out.println(newPool.getTiles(11));
/* We have 100 tiles in the pool */
System.out.println(newPool.getTilesRemaining()); //100
System.out.println(newPool.isEmpty()); //false
newPool.getTiles(5); //ok
System.out.println(newPool.getTilesRemaining()); //95
}
}
第二類
import java.util.Random;
public class Pool {
char[] zeroPoint = {'*','*'};
char[] onePoint = {'a','a','a','a','a','a','a','a','a','e','e','e','e','e','e','e','e','e','e','e','e','i','i','i','i','i','i','i','i','i','o','o','o','o','o','o','o','o','n','n','n','n','n','n','r','r','r','r','r','r','t','t','t','t','t','t','l','l','l','l','s','s','s','s','u','u','u','u'};
char[] twoPoint = {'d','d','d','d', 'g', 'g', 'g', 'g',};
char[] threePoint = {'b', 'b', 'c', 'c', 'm', 'm', 'p', 'p'};
char[] fourPoint = {'f', 'f', 'h', 'h', 'v', 'v', 'w', 'w', 'y', 'y'};
char[] fivePoint = {'k'};
char[] eightPoint = {'j', 'x'};
char[] tenPoint = {'q', 'z'};
char[] charPool = new char[102];
String stringPool = new String(onePoint)+ new String(twoPoint)+ new String(threePoint)+ new String(fourPoint)+ new String(fivePoint)+ new String(eightPoint)+ new String(tenPoint);
public Pool(){
charPool = stringPool.toCharArray();
}
public int getValue(char letter){
int value=0;
if(new String(zeroPoint).indexOf(letter)>-1){
value=0;
} else if(new String(onePoint).indexOf(letter)>-1){
value=1;
} else if(new String(twoPoint).indexOf(letter)>-1){
value=2;
} else if(new String(threePoint).indexOf(letter)>-1){
value=3;
} else if(new String(fourPoint).indexOf(letter)>-1){
value=4;
} else if(new String(fivePoint).indexOf(letter)>-1){
value=5;
} else if(new String(eightPoint).indexOf(letter)>-1){
value=8;
} else if(new String(tenPoint).indexOf(letter)>-1){
value=10;
}
return value;
}
public void poolReset(){
charPool = stringPool.toCharArray();
}
public char[] getTiles(int numberOfTiles){
Random randomTile = new Random();
int randomNum;
int returned;
char[] tilesReturned = new char[numberOfTiles];
for(int i=0; i<numberOfTiles; i++){
returned=0;
do{
randomNum=randomTile.nextInt(102);
if(charPool[randomNum]!='0') {
tilesReturned[i]=charPool[randomNum];
charPool[randomNum]='0';
returned = 1;
}
}while(returned==0);
}
return tilesReturned;
}
public char[] swapTiles(char[] tilesToSwap){
Random randomTile = new Random();
int randomNum;
int returned;
int numberOfTiles = tilesToSwap.length;
char[] tilesReturned = new char[numberOfTiles];
for(int i=0; i<numberOfTiles; i++){
returned=0;
while(returned==0){
randomNum=randomTile.nextInt(102);
if(charPool[randomNum]!='0') {
tilesReturned[i]=charPool[randomNum];
charPool[randomNum]=tilesToSwap[randomNum];
returned = 1;
}
}
}
return tilesReturned;
}
public boolean isEmpty(){
boolean empty=true;
for(int i=0; i<102; i++){
if(charPool[i]!='0'){
empty=false;
}
}
return empty;
}
public int getTilesRemaining(){
int tilesRemaining=0;
for(int i=0; i<102; i++){
if(charPool[i]=='0'){
tilesRemaining++;
}
}
return tilesRemaining;
}
}
控制檯輸出
10
stsfrebias
goresthltii
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 99
at Pool.getTilesRemaining(Pool.java:98)
at PoolTest.main(PoolTest.java:10)
調試器是你的朋友! – Christian 2015-02-05 15:44:52
在Java中,數組有長度屬性,這是有原因的。 – meskobalazs 2015-02-05 15:46:16
看起來像你只是在一些'for'週期有索引範圍的錯誤。不要懶惰 - 使用調試器並檢查它。 :) – sphinks 2015-02-05 15:46:41