ArrayList<Integer> digitList = new ArrayList<Integer>();
ArrayList<Integer> newBase = new ArrayList<Integer>();
public void toX(int base, int oNum) {
while(base > 0) {
digitList.add(base % 10);
base /= 10;
}
int[] digits = digitList.stream().mapToInt(i->i).toArray();
for(int i = 0; i<digits.length/2; i++) {
int a = digits[i];
digits[i] = digits[digits.length -i -1];
digits[digits.length -i -1] = a;
}
System.out.println(Arrays.toString(digits));
for(int i = 0; i < digits.length; i++) {
total += digits[i];
}
System.out.println(total);
while(total >= 0) {
if(total >= oNum) {
newBase.add(total - oNum);
total -= oNum;
System.out.println(total);
}
else {
newBase.add(total);
}
}
int[] ans = newBase.stream().mapToInt(i->i).toArray();
System.out.println(Arrays.toString(ans));
}
此方法用於將基數10中的數字轉換爲baseX中的數字。它畫完了,我不斷收到多個錯誤:java.lang.OutOfMemoryError:stream.mapToInt()/ ArrayLists上的Java堆空間
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Unknown Source)
at java.util.Arrays.copyOf(Unknown Source)
at java.util.ArrayList.grow(Unknown Source)
at java.util.ArrayList.ensureExplicitCapacity(Unknown Source)
at java.util.ArrayList.ensureCapacityInternal(Unknown Source)
at java.util.ArrayList.add(Unknown Source)
at BaseConverter.toX(BaseConverter.java:34)
線33-35是:
else {
newBase.add();
}
我覺得現在的問題從陸續建成,但是我非常缺乏經驗與流的ArrayList 。
我發現'oNum = 0'的無限循環問題。此外,你可以這麼一些'mapToInt'技巧來反轉數字而不需要循環:https://stackoverflow.com/questions/24010109/java-8-stream-reverse-order –
想想如果total> = 0會發生什麼但小於oNum;) –