hashmap

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . I have a problem about getting a value from my ArrayList<HashMap<String, String>> . My code is: ArrayList<HashMap<String, String>> myArrayList; and then: HashMap<String, String> map = new HashMap<String, String>(

问题 There is JTable with the following content Col1 | Col2 A | 1 A | 2 A | 3 B | 5 B | 1 C | 5 C | 4 C | 2 Based on this table, I need to create a HashMap numbers : column 1 refers to keys and column 2 refers to data. Below I provide my code snippet. The question is: is there any quicker way to create the mentioned HashMap? HashMap numbers = new HashMap<String, List<String>>(); for (int i=0; i<tbNumbers.getRowCount(); i++) { col1 = mdNumbers.getValueAt(i,0).toString(); col2Array = new ArrayList

问题 I'd like to explore the option of using a HashMap to keep track of changes between files. I'm using a few config/text files to give a set of documents of status: The config file looks like: STATUS1 = "Doc1.pdf, Doc2.xls, Doc5.doc" STATUS2 = "Doc8.pdf, Doc6.doc" STATUS3 = "Doc10.pdf" ... Instead of having to create a separate HashMap for each instance like so: Map<String, String> map1 = new HashMap<String, String>(); Map<String, String> map2 = new HashMap<String, String>(); Map<String, String>

问题 This question already has answers here : How to convert “Mon Jun 18 00:00:00 IST 2012” to 18/06/2012? (4 answers) Closed 2 years ago . I have a problem with date converting. I use the following program and I expect the output: 19.05.2017 But the output is: 05.00.2017 Can anybody help? String t = "Fri May 19 00:00:00 CEST 2017"; Date d = new SimpleDateFormat("EEE MMM DD hh:mm:ss zzzz YYYY", Locale.US).parse(t); String s = new SimpleDateFormat("dd.mm.yyyy").format(d).toString(); System.out

问题 I keep getting empty maps when i am passing data into two hash maps in clojure, i know that the data is being sent through the functions as i have used print statements that show it correct data, its just when i assoc the data to the map it doesnt appear to do anything and leaves me with {} Can anyone see what i am doing wrong?? (defn sort-string [y] (apply str (sort y))) (defn get-unique [y] (let [x (sort-string (str/lower-case y)) hashmap1 (hash-map) hashmap2 (hash-map)] (if-not (contains?

问题 I am newbie to Android and I am working in an Android project. I want to implement a data model, using that model I want to perform the arithmetic operations using the Hash Map. But I don't know how to implement it. And also I want to print the value in Text View. The project is like an Calculator. ModelActivity Create the getter and setter I don't know how to implement this MainActivity Using that Model I have to perform the operation like getting and setting the value using the Hash map.

问题 Is there any way to set the accumulator to 0 after every time we use it and after that it still performs the same function? or How to calculate the overall value for each key in a Map like this : String, Hashmap String, Integer ? I am trying to be as clarifying as I can but I don't have a clue about that. /*EXAMPLE OF HASHMAP: String e.g - UK ; America ; Africa , etc. String e.g - black , white, asian Integer e.g- 2008 , 103432 , 2391 // for every country the values are diff */ //one way to

问题 I would like to ask for help. Let's say I have HashMap with key-value like this: String1 0.99 String2 0.98 String3 0.97 String4 0.98 String5 0.5 String6 0.4 String7 0.3 etc. And I would like to save to array the top 15 entries by this formula: Math.abs(value - 0.5). The counted values (by the formula) for this data would be: String1 0.49 String2 0.48 String3 0.47 String4 0.48 String5 0 String6 0.1 String7 0.2 The values sorted String1 0.49 String4 0.48 String2 0.48 String3 0.47 String7 0.2

问题 This question already has answers here : Can a java array be used as a HashMap key (6 answers) Closed 2 years ago . I'm currently trying to solve a code wars problem titled Battle ships: Sunk damaged or not touched? . Given a 2D array containing 'ships' and another 2D array containing the attack coordinates I have to generate a score. I populate a hashmap with the ship locations and then check the attack locations against the map. When printed, the original locations and attacks are identical

问题 I want to set the input value using edit text and get the values from that model and have to set the text in TextView . I have tried the following method, but it is not working: Main Activity Mode setvalue = new Mode(); Mode getvalue = new Mode(); setvalue.set("jeeva",value1.getText().toString()); calculate.setText(getvalue.get("jeeva")); Model class public class Mode { private HashMap<String, Object> data; public Mode() { this.data = new HashMap<String, Object>(); } public Object get(String