遍历Map的两种方式

最新推荐文章于 2025-06-01 16:34:28 发布

原创最新推荐文章于 2025-06-01 16:34:28 发布 · 1.5k 阅读

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#JAVA

package com.it;

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

public class Test {
	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");
		// method1(map);
		method2(map);
	}

	public static void method1(Map<String, String> map) {
		Set<Map.Entry<String, String>> entrys = map.entrySet();
		for (Map.Entry<String, String> entry : entrys) {
			String key = entry.getKey();
			String value = entry.getValue();
			System.out.println("key : " + key + "    value : " + value);
		}
	}
		
	public static void method2(Map<String, String> map) {
		Set<String> keys = map.keySet();
		for (String key : keys) {
			String value = map.get(key);
			System.out.println("key : " + key + "----value : " + value);
		}
	}
	
}