java单选

Import java.util.ArrayList;

import java.util.List;

Public class Test {

public static void main(String args[]) {

List list = new ArrayList();

list.add(new Test());

list.add(new String(""ABC""));

list.add(new Test());

System.out.println(list.size());

}

}

Iterator it = list.iterator();

int index = 0;

while (it.hasNext()){

Object obj = it.next();

if (needDelete(obj)) { //needDelete返回boolean，决定是否要删除

//todo delete

}

index ++;

}

1)

2) { if(unsafe()){//do something…}

3) else if(safe()){//do the other…}

4) }

上述代码结果是( )。