Map 的遍历

package edu.map;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class MapTest {

public static void main(String[] args) {
Map<String, String> map = new HashMap<String, String>();
map.put("name", "dave");
map.put("password", "123456");
map.put("address", "CQUPT");
// 方法一
Set<String> set = map.keySet();
for (String key : set) {
System.out.println(key + ":" + map.get(key));
}
// 方法二
Set<Entry<String, String>> set2 = map.entrySet();
for (Entry<String, String> entry : set2) {
System.out.println(entry);
}
}
}