Question

是在java.util.Map Map.Entry是什么意思啊? 可以的话请写个例子

Answer 1

public class A {
public static void main(String[] args) {
Map<Integer,Integer> mm = new HashMap<Integer,Integer>();
for(int i=0;i<10;i++)
{
mm.put(i, i);
}
for( Entry<Integer, Integer>纳帆首 e : mm.entrySet())
{
System.out.println("key:"+e.getKey());
System.out.println("value:"+e.getValue());
}
for( Iterator<Entry<Integer, Integer>> i = mm.entrySet().iterator();i.hasNext(); )
{
Entry<Integer, Integer> e = i.next();
System.out.println("key:"+e.getKey());
System.out.println("洞数value:"轿弯+e.getValue());
}
}
}

Answer 2

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class MapTest {
Map map = new HashMap();
public MapTest(){
map.put("隐携a","a");
map.put("b","棚穗b"链携卜);
map.put("c","c");
}

public static void main(String[] args) {
MapTest mt = new MapTest();
Iterator it = mt.map.entrySet().iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}
}