Question

JAVA中LISt遍历时如何remove元素

Answer 1

public class RemoveElementDemo {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("100012011");
list.add("10001201s1");
list.add("10001201s1");
//解决方案:
//1.i--操作
/*for(int i = 0;i < list.size();i++){
String b = list.get(i);
if(b.equals("502323232")){
list.remove(i);
i--;
}
}*/
//2.反向遍历
/*for(int i = list.size() - 1;i >= 0;i--){
String b = list.get(i);
if(b.equals("502323232")){
list.remove(i);
}
}*/
//解决方案:调用Iterator的remove()方法安全删除元素,避免异常
Iterator<String> iter = list.iterator();
while(iter.hasNext()){
String b = iter.next();
if(b.equals("100012011")){
iter.remove();
}
}
for(String b : list){
System.out.println(b);
}
}
}

Answer 2

可以将需要remove的元素的index存数组或者list,循环结束之后remove掉