Show multiple values for multiple keys in Java Hashmap
Tag : java , By : Felix Almeida
Date : March 29 2020, 07:55 AM
like below fixes the issue The reason why you have only last list included is because of your insert method: List <String> list= new ArrayList<String>();
list.add("0321564988");
list.add("7891268429");
contacts.addContact("Name1",list);
list.clear();
list.add("1891219122");
list.add("9495198929");
contacts.addContact("Name2",list);
list.clear();
list.add("8949219912");
contacts.addContact("Name3",list);
List <String> list= new ArrayList<String>();
list.add("0321564988");
list.add("7891268429");
contacts.addContact("Name1",list);
List <String> list1= new ArrayList<String>();
list1.add("1891219122");
list1.add("9495198929");
contacts.addContact("Name2",list1);
List <String> list2= new ArrayList<String>();
list2.add("8949219912");
contacts.addContact("Name3",list2);
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convert JSON file to a hashmap in java with error Can not deserialize instance of java.util.HashMap out of START_ARRAY t
Tag : java , By : Gianluca Riccardi
Date : March 29 2020, 07:55 AM
may help you . Try reading it in as an array of maps. A json map would look like this: { "AC": 1.1324, "AD": 0.64956, "AE": 1.4508, "AF": -0.94481 }
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Java HashMap multiple keys with multiple values assigned flexible
Date : March 29 2020, 07:55 AM
Hope that helps I have a problem with my Java Code. I want to store multiple Values in one Key but I want to store them flexible. This means I read from a textfile and every line is one word. To store them, I want to build pairs of words. For example: , I think I'd be looking at something like List l = hmap.get(line);
if (l != null) {
l.add(line));
}else {
l = new ArrayList<String>();
l.add(line)
hmap.put(line, l);
}
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How to create several .csv files from several hashMap in Java?
Tag : java , By : user87225
Date : March 29 2020, 07:55 AM
wish of those help Create new FileWriter for every file in which you want to write. Because currently you are creating only 1 file.
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JAVA HashMap 2D, cant get the right approach to make a 2D HashMap, i mean a HashMap into another HashMap
Tag : java , By : Jesenko Mehmedbasic
Date : March 29 2020, 07:55 AM
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