ArrayList異常我有以下代碼：private String toString(List<DrugStrength> aDrugStrengthList) {
StringBuilder str = new StringBuilder();
for (DrugStrength aDrugStrength : aDrugStrengthList) {
if (!aDrugStrength.isValidDrugDescription()) {
aDrugStrengthList.remove(aDrugStrength);
}
}
str.append(aDrugStrengthList);
if (str.indexOf("]") != -1) {
str.insert(str.lastIndexOf("]"), "\n " );
}
return str.toString();}當我試圖運行它時，我得到ConcurrentModificationException，有人能解釋為什么會發(fā)生這種情況，即使代碼運行在同一個線程中嗎？我怎么才能避免呢？
3 回答
狐的傳說
TA貢獻1804條經(jīng)驗 獲得超3個贊
Iterator
for (DrugStrength aDrugStrength : aDrugStrengthList) {
if (!aDrugStrength.isValidDrugDescription()) {
aDrugStrengthList.remove(aDrugStrength);
}}for (Iterator<DrugStrength> it = aDrugStrengthList.iterator(); it.hasNext(); ) {
DrugStrength aDrugStrength = it.next();
if (!aDrugStrength.isValidDrugDescription()) {
it.remove();
}}
呼如林
TA貢獻1798條經(jīng)驗 獲得超3個贊
Iterator
Iterator<Item> iter = list.iterator();while(iter.hasNext()) {
Item blah = iter.next();
if(...) {
iter.remove(); // Removes the 'current' item
}}
鴻蒙傳說
TA貢獻1865條經(jīng)驗 獲得超7個贊
int size = list.size();for (int i = size - 1; i >= 0; i--) {
if(remove){
list.remove(i);
}}添加回答
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