import java.util.Collection;

import java.util.HashMap;

import java.util.Map;

import java.util.Set;

public class Test {

	public static void main(String[] args) {

		Map<String, Object> map = new HashMap<String, Object>();

		map.put("hah", 123);

		map.put("aa", 12314);

		map.put("xu", "123");

//		map.clear();

		Object object = map.get("hah");

		System.out.println("map.get:" + object);

		boolean containsKey = map.containsKey("hah");

		System.out.println("map.containsKey:" + containsKey);

		int hashCode = map.hashCode();

		System.out.println("map.hashCode:" + hashCode);

		boolean empty = map.isEmpty();

		System.out.println("map.isEmpty:" + empty);

		Set<String> keySet = map.keySet();

		System.out.println("map.keySet:" + keySet);

		Object remove = map.remove("xu");

		System.out.println("map.keySet:" + map.keySet());

		int size = map.size();

		System.out.println("map.size:" + size);

		Collection<Object> values = map.values();

		System.out.println("map.values:" + values);

		Set<String> keySet2 = map.keySet();

		System.out.println("map.keySet2:" + keySet2);

		Map<String, Object> map1 = new HashMap<String, Object>();

		map1.put("aa", "123");

		map1.put("bb", 234);

		Map<String, Object> map2 = new HashMap<String, Object>();

		map2.put("aa", "123");

		map2.put("bb", 234);

		boolean equals2 = map1.equals(map2);

		System.out.println("map2.equals:" + equals2);

	}

}

map.get:123

map.containsKey:true

map.hashCode:163837

map.isEmpty:false

map.keySet:[aa, hah, xu]

map.keySet:[aa, hah]

map.size:2

map.values:[12314, 123]

map.keySet2:[aa, hah]

map2.equals:true