java 有序map： LinkedHashMap

测试代码如下：

@Test
public void testLinkedHashMap(){

Map hashmap=new HashMap();
Map linkedhashmap=new LinkedHashMap();
for(int i=0;i<100;i++){
hashmap.put("key"+i, "value"+i);
linkedhashmap.put("key"+i, "value"+i);
}
System.out.println("HashMap"+hashmap);
System.out.println("linkedhashmap"+linkedhashmap);
}

------------输出内容如下：

     

                 HashMap{key38=value38, key39=value39, key34=value34, key35=value35, key36=value36, key37=value37, key42=value42, key41=value41, key44=value44, key43=value43, key40=value40, key4=value4, key3=value3, key6=value6, key5=value5, key0=value0, key2=value2, key1=value1, key49=value49, key47=value47, key8=value8, key48=value48, key7=value7, key45=value45, key46=value46, key9=value9, key55=value55, key54=value54, key53=value53, key52=value52, key51=value51, key50=value50, key56=value56, key57=value57, key58=value58, key59=value59, key60=value60, key62=value62, key61=value61, key64=value64, key63=value63, key66=value66, key65=value65, key69=value69, key67=value67, key68=value68, key73=value73, key72=value72, key71=value71, key70=value70, key77=value77, key76=value76, key75=value75, key74=value74, key79=value79, key78=value78, key80=value80, key85=value85, key86=value86, key87=value87, key88=value88, key81=value81, key82=value82, key83=value83, key84=value84, key89=value89, key10=value10, key11=value11, key90=value90, key91=value91, key98=value98, key99=value99, key96=value96, key97=value97, key94=value94, key95=value95, key92=value92, key93=value93, key21=value21, key22=value22, key20=value20, key15=value15, key14=value14, key13=value13, key12=value12, key19=value19, key18=value18, key17=value17, key16=value16, key30=value30, key31=value31, key32=value32, key33=value33, key24=value24, key23=value23, key26=value26, key25=value25, key28=value28, key27=value27, key29=value29}

linkedhashmap{key0=value0, key1=value1, key2=value2, key3=value3, key4=value4, key5=value5, key6=value6, key7=value7, key8=value8, key9=value9, key10=value10, key11=value11, key12=value12, key13=value13, key14=value14, key15=value15, key16=value16, key17=value17, key18=value18, key19=value19, key20=value20, key21=value21, key22=value22, key23=value23, key24=value24, key25=value25, key26=value26, key27=value27, key28=value28, key29=value29, key30=value30, key31=value31, key32=value32, key33=value33, key34=value34, key35=value35, key36=value36, key37=value37, key38=value38, key39=value39, key40=value40, key41=value41, key42=value42, key43=value43, key44=value44, key45=value45, key46=value46, key47=value47, key48=value48, key49=value49, key50=value50, key51=value51, key52=value52, key53=value53, key54=value54, key55=value55, key56=value56, key57=value57, key58=value58, key59=value59, key60=value60, key61=value61, key62=value62, key63=value63, key64=value64, key65=value65, key66=value66, key67=value67, key68=value68, key69=value69, key70=value70, key71=value71, key72=value72, key73=value73, key74=value74, key75=value75, key76=value76, key77=value77, key78=value78, key79=value79, key80=value80, key81=value81, key82=value82, key83=value83, key84=value84, key85=value85, key86=value86, key87=value87, key88=value88, key89=value89, key90=value90, key91=value91, key92=value92, key93=value93, key94=value94, key95=value95, key96=value96, key97=value97, key98=value98, key99=value99}