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hAshmAp怎么嵌套hAshmAp

import java.util.HashMap; import java.util.Map; public class Test { public static void main(String[] args) { Map map1 = new HashMap(); map1.put("hey1","val1"); map1.put("hey2","val2"); map1.put("hey3","val3"); map1.put("hey4","...

Map map=new HashMap(); Iterator it=map.keySet().iterator(); Object key; Object value; while(it.hasNext()){ key=it.next(); value=map.get(key); System.out.println(key+":"+value); }

经测试,你的代码没问题,不过你写代码的细节不是特别规范,很多时候不会那样写,先附上测试图吧 在这我想指出你写代码的一些细节性问题,当然你写的没有错,只是看着不舒服,可读性比较差HashMap chuanzhi=new HashMap();这句里边应该有两个细...

String s = "{\"a1\":\"v1\",\"a2\":\"v2\"}"; Object obj = JSONObject.toBean(JSONObject.fromObject(s),HashMap.class); System.out.println(((HashMap) obj).get("a1"));

都已经枚举出来,就建立一个ArrayList,add到里面就是了 ~ ~ ~ ~ ~

Map outMap = new HashMap(); Map tempMap = new HashMap(); outMap.put("inMap1", tempMap); outMap.put("inMap2", tempMap); Iterator outIter = outMap.keySet().iterator(); while(outIter.hasNext()){//迭代外层map Map inMap = (Map)outMa...

Java代码: List list = new ArrayList(); Map map1 = new HashMap(); map1.put("phone", "13655555555"); map1.put("email", "...

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