Java 遍历Map时 删除元素ZZ 分类: Android资源 2014-05-30 10:59 74人阅读 评论(0) 收藏
http://niewj.iteye.com/blog/1469161
private static Map
map=new HashMap();
public static void
main(String[] args) {
map.put(1,"one");
map.put(2,"two");
map.put(3,"three");
map.put(4,"four");
map.put(5,"five");
map.put(6,"six");
map.put(7,"seven");
map.put(8,"eight");
map.put(5,"five");
map.put(9,"nine");
map.put(10,"ten");
Iterator> it =
map.entrySet().iterator();
while(it.hasNext()){
Map.Entry
entry=it.next();
int
key=entry.getKey();
if(key%2==1){
System.out.println("delete
this: "+key+" = "+key);
//map.put(key, "奇数");
//ConcurrentModificationException
//map.remove(key);
//ConcurrentModificationException
it.remove();
//OK
}
}
//遍历当前的map;这种新的for循环无法修改map内容,因为不通过迭代器。
System.out.println("-------\n\t最终的map的元素遍历:");
for(Map.Entry entry:map.entrySet()){
int
k=entry.getKey();
String
v=entry.getValue();
System.out.println(k+" = "+v);
}
}
package net.nie.test;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class HashMapTest {
}
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