[size=medium][color=darkred]代码很简单 ,其实就是想测试一下iterator 的用法,而且我在用iterator遍历的时候也没有修改原来集合中的内容。
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class TestList {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
List<String> l = new ArrayList<String>();
Iterator it = l.iterator();
String s = "abc";
for(int i=0;i<10;i++){
s+=i;
l.add( s);
}
System.out.println(l);
while(it.hasNext()){
System.out.println("aa");
it.next();
}
}
}[/color][/size]
运行结果:
[color=red]Exception in thread "main" java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at TestList.main(TestList.java:34)[/color]
[abc0, abc01, abc012, abc0123, abc01234, abc012345, abc0123456, abc01234567, abc012345678, abc0123456789]
aa