entryset

Private hashtable // Method 1: entryset () // Iterator it = emails. entryset (). iterator (); // While (it. hasnext ()){ // Map. Entry M = (Map. Entry) it. Next (); // Logger.info ("email-" + M. getkey () + ":" + M. getvalue ()); //} // Method 2: directly recycling For (Map. Entry Logger.info ("email-" + M. getkey () + ":" + M. getvalue ()); } // Method 3: Use keyset () Iterator it = ema

. MODE_PRIVATE); SharedPreferences. editor editor = preferences. edit (); // The Map class provides a method called entrySet (), which returns a Map. object set after Entry instantiation. // Next, Map. the Entry class provides a getKey () method and a getValue () method. // Therefore, the above Code can be organized to better conform to the logic for (Map. entry Entry: map. entrySet () {Strin

. doXMLParse (xmlStr ); Prepay_id = (String) map. get ("prepay_id "); } SortedMappayMap = newTreeMap (); PayMap. put ("appid", appid ); PayMap. put ("partnerid", "Your merchant id, go to the merchant platform to view "); PayMap. put ("prepayid", prepay_id ); PayMap. put ("package", "Sign = WXPay "); PayMap. put ("noncestr", create_nonce_str ()); PayMap. put ("timestamp", WXRequestUtil. create_timestamp ()); StringpaySign = createSign (payMap ); PayMap. put ("paySign", paySign ); ReturnpayMap; }

{ Manifest sf = new Manifest(); Attributes main = sf.getMainAttributes(); main.putValue("Signature-Version", "1.0"); main.putValue("Created-By", "1.0 (Android SignApk)"); BASE64Encoder base64 = new BASE64Encoder(); MessageDigest md = MessageDigest.getInstance("SHA1"); PrintStream print = new PrintStream( new DigestOutputStream(new ByteArrayOutputStream(), md), true, "UTF-8"); // Digest of the entire manifest manifest.write(print); print.flush(

as follows: Public interface Map The interface has a values method. By calling this method, all values in the Map set can be returned. There is a keySet () method, and the key values in all maps can be obtained after the call; call the entrySet () method to obtain all key-value pairs in the Map and store them in the form of a Set. To better express the key-value, the interface also defines an Entry Public class HashMap Some important variables a

Every time, forget ~~ Mark it. You forget it. Hahaha ~~ Ah, old, getting useless ~~ Bytes --------------------------------------------------------------------------------------------- Private Static Map Private Static Map Private Static Map Private Static Map For (iterator it = projectipblackinfo. Get ("project1"). iterator (); it. hasnext ();){ System. Out. println (it. Next ()); } For (iterator it = projectipmaskedinfo. entryset (). iterator ()

Map set: This set stores key-value pairs. One-to-one storage. The key must be unique. When there is a ing relationship between elements, consider creating a map set. Method Abstract: 1. Add: if the same key is displayed when the key is added. Then the added value overwrites the corresponding value of the original key, and the put method returns the overwritten value. Put (K key, V value) Putall (Map 2. Delete Clear () Remove (Object key) 3. Judgment Containvalue (object value) Containskey (Obj

. "Because the set in the ing key must be unique, you can use set to support it. You can also delete an element from the view. At the same time, the value related to the keyword will be deleted from the source image, but you cannot add any element ." Collection values (): returns the gallery of all values in the image. "Because the set of ing values is not unique, you can use collection to support it. You can also delete an element from the view. At the same time, the value and its keyword will

is as follows: Import Java. util. *; Class arraylisttest {// iteration output element public static void printelements (Collection e) {iterator iter = E. iterator (); While (ITER. hasnext () {system. out. println (ITER. next () ;}} public static void main (string [] ARGs) {/* // basic test arraylist Al = new arraylist (); Al. add ("Java"); Al. add ("arraylist"); Al. add ("test"); For (INT I = 0; I (3)Hashset and hashmapHashset: implements the hash table of the Set interface, which is implement

Java 2's collections framework mainly includes two interfaces and their extensions and implementation classes: Collection interface and map interface. The difference between the two lies in that the former stores a group of objects, while the latter stores some key/value pairs. PublicInterfaceJava. util. Map { // Altering methodsPublicObject put (Object key, object value );PublicObject remove (Object key );PublicVoidPutall (Java. util. Map );PublicVoidClear (); // Querying MethodsPublicObject g

shown in the preceding figure, // If the number of elements in a division is greater than 2 and the sum of the first two elements is less than or equal to the third number, // Merge the first two values of the Division, and the other values remain unchanged to generate a new division. The Code is as follows: Public static map getlist (int n ){Map If (n = 1 ){Map. Put ("1", "1 = ");Return map;}Map = getlist (n-1 );Map For (Map. Entry entry: map. entryset