方式一:使用Iterator的remove()方法
public class Test {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("bb");
list.add("cc");
Iterator<String> it = list.iterator();
while(it.hasNext()){
String str = (String)it.next();
if("aa".equals(str)){
it.remove();
}
}
System.out.println(list.size());
}
}
方式二:使用List的remove()方法,注意list.size()的位置
public class Test {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("bb");
list.add("cc");
for (int i = list.size() - 1; i >= 0; i--) {
String str = list.get(i);
if ("aa".equals(str)) {
list.remove(str);
}
}
System.out.println(list.size());
}
}
方式三:使用CopyOnWriteArrayList
public class Test {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("bb");
list.add("cc");
CopyOnWriteArrayList<String> cowList = new CopyOnWriteArrayList<String>(list);
for (String str : cowList) {
if ("aa".equals(str)) {
cowList.remove(str);
}
}
System.out.println(cowList.size());
}
}