简单的小操作——取得Map的key和value

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

public class GetKeyAndValue {

	public static void main(String[] args) {
		Map<String, String> map = new HashMap<String, String>();
		map.put("key1", "value1");
		map.put("key2", "value2");
		map.put("key3", "value3");
		Set<Entry<String, String>> set = map.entrySet();
		Iterator<Entry<String, String>> itr = set.iterator();
		while (itr.hasNext()) {
			Map.Entry<String, String> entry = itr.next();
			System.out.print("key=" + entry.getKey());
			System.out.println(" , value=" + entry.getValue() + "\r\n");
		}
	}
}