arraylist
I can't implement List collection methods in JAVA
Encountered a problem when executing the task: I can't implement the methods of the List collection in accordance with the ta ... sk = Integer.parseInt(task);
} else if (input.equals("end")) {
for (String task : list) {
}
}
}
Phone Directory, Add and Remove data to the Java array
I'm a newbie, the task is to write a phone directory, which has three functions: find, add, delete.
I need to create an array ... PhoneNumber
public void showFullName() {
System.out.println(surname + " " + name1 + " " + patronymic);
}
}
Java identifier expected
A little confused. I have such constructors:
public Circle() {
this.center = new Point(0,0);//center.getX()
this.inli ... (new Circle(new Point(0,0),new Point(5,5) ));
shapes.add(new Circle());
shapes.add();
}
Implementing a dynamic array in Java
Please help me understand the topic of Java dynamic arrays.
I need to create a class DynamicArray, which stores an array, a ... , one example of a dynamic array is ArrayList and you need to implement methods like it. Thank you in advance for your help!
How do I split a string into substrings?
I have a collection of ArrayList with a single string of more than 10000 + characters.
[81383,892881,381818,54881,1283128... ... there are total elements.
For the example of this sheet, I would like to get like this:
81383
892881
381818
54881
1283128
Determine which Java language keywords the file contains
I only googled contains, but for some reason it doesn't work.. apparently I'm doing something wrong
keyWords - ArrayList< ... sortedList.add(g);
counter++;
}
}
}
List in list in list
There is a certain list - the gray squares are its elements. There can be N of them. Each element of this list can contain an ...
неверно точка s2x1 стоит в точке s1x2
This is an addendum to this question: Parse the date and make a list of date range
Copying an ArrayList
There are ArrayList with values.Question: how can I completely copy an array value without loops?
ArrayList a;
ArrayList b;
a = b;// Присвоить все значения b в этот массив.
Unity does not enter a permanent variable in the array
There is such a class
public class Item : MonoBehaviour
{
[Header("Ссылка на префаб")]
public string PrefabReferenc ... .........
Y: 2 X: 6
And after adding the {[9] element]}
null Y: 0 X: 0
Y: 0 X: 1
Y: 0 X: 2
.........
.........
Y: 2 X: 6
Reading and Writing an Object Array List to a file
How to implement writing an object Array List to a file: txt or xml.
Please explain this with specific examples. I'm doing a ... his instance. And whether the program will then correctly serialize my list with User objects, and not the empty list itself.
How do I initialize an ArrayList from a char array?
There is such a code:
List<Character> charArray = new ArrayList<>(Arrays.asList(string.toCharArray()));
But a ...
List<Integer> charArray = new ArrayList<>(Arrays.asList(23,22,32));
UPD: Forgot to add without using a loop.
Redefining the add sheet methods
I can't override the add methods. Or rather, I can, but they don't work the way they should. The essence of the problem: We h ... le));
System.out.println(box.size());
}
}
When executing, we see:
true
true
2
And it should be:
true
false
1
Index returning -1 in Java ArrayList
Good Morning. For study purposes, I am making a simple application in RMI Java that simulates some operations(Create Account, ... executeMetodo(opcao);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Data does not persist in txt file
Good Morning, I have a question, I have this code, which is a contact schedule and the data should be persisted in a txt file ... printf("\nTelefone:%s\n",dados[1]);
}
}
}
}
Write and print data to an ArrayList
I am doing a college job and I need to save in an arrayList the name and age of 10 people and then print the data of the pers ... dade(int idade) {
this.idade=idade;
}
public String toString(){
return nome + " " + idade;
}
}
How to convert a list to string and vice versa?
I have a list: ('47075', 'josenestle', 'i need help')
I do str1 = str (list) and have in string.
However if I do list (str1) I do not recover my list.
I can't find any obvious solution, help would be very grateful.
View Java database values
I'm a beginner in Java and I'm making a mini RPG-style program for database testing, and I want to display the data contained ... emDB();
System.out.println(nwDB.showPersonagem());
}
} while(opc != 3);
}
}
What are the applications of arrays in the day to day? (examples of its usability)
I did an internet search on the use of arrays and found many results aimed at creating games only... But other than this exam ... on the day a day ("it is not the focus of java" and you will see why when we study database")...
But curiosity still stayed.
How do I display object information from my ArrayList?
I want to create a ArrayList to store information about students (name, typeset number and status) but I'm not getting ArrayL ...
System.out.println(turma.getInfo()); // o erro acontece nesta linha
}
}
}
What's wrong with my code?
Print arraylist information on screen
I have a ArrayList but I am not being able to print the data on the screen.
Follows Class:
public class Cachorro {
p ... cc = new Cachorro("rotweiller","preto","Flora","Cesar",8);
dog.add(cc);
System.out.println(dog);
}
}