Objects don’t have names – variables have names. When you declare a variable and initialize it (Java): Person alice = new Person(“Alice”, 25); then alice is the name of a variable, not the name of an object. If you need to create objects in a loop and keep track of them, then use an array … Read more
As you mentioned the split-function can handle this. String[] types = new String[columnNameType.length]; String[] names = new String[columnNameType.length]; for(int i = 0 ; i< columnNameType.length; ++i){ names[i] = columnNameType[i].split(” “)[0]; types[i] = columnNameType[i].split(” “)[1]; } iterate your array and split every element on its own. 1 solved How to split an string array element by … Read more
Try using foreach() for(Employee employee : employees()) { System.out.println(employee.name); } solved Incrementing a for loop over a List of java objects [duplicate]
Vector is just a data structure. It cannot be used to read/write employee records from/into files. It can, however, be used to keep employee records in memory. To implement the functionality that you need, you need to: Think on how the employee records are represented in file. Is it in CSV? XML? JSON? Once you … Read more
Yes, it is possible. You won’t find a solution online to something that specific. Do research on how to pull data from web pages. One easy way I can suggest is pay attention to the HTML tags used for the data you want, and search only through the relevant tags. That will cut down on … Read more
Make your Racer superclass abstract and include an abstract method called move. Then when you extend Racer to each of the racer types, you can write unique methods that all return a value indicating the distance to move. This enables you to create a list of racers and call the move method directly from the … Read more
Lacks Conditional Statement The answer to the mistake in your program is that it’s an unending loop. It’ll always be true because you just asked the value of accountNum and didn’t add conditional statement. Use this code below as replacement to your code and it works. import java.util.Scanner; public class Yehey { public static void … Read more
I’ve knocked up a quick program to test how long it takes, here I believe I have used a 20 digit long number. I know it’s not exactly the parameters that you have asked for, however it gives a good illustration to what kind of speed you can be expecting. This was run on a … Read more
public HashMap<String, List<String>> getSortedHashMapForEmployees(string searchKeyword,List<yourDtoFromDB> orginalListFromDB) { HashMap<String, List<String>>hashmap=new HashMap<String, List<String>>(); for (List<yourDtoFromDB> orginalList : orginalListFromDB) { if(orginalList.getName().contains(searchKeyword)) { List<String>accountNo=new ArrayList<String>(); if(hashmap.containsKey(orginalList.getName())) { accountNo=hashmap.get(orginalList.getName()); } accountNo.add(orginalList.getAccountNo()); hashmap.put(orginalList.getName(), accountNo); } } return hashmap; } 3 solved How to search a list and return the specific strings and data associated with it using Java
You shall direct print it. import java.util.Random; public class compountInterest { public static void main(String[] args){ System.out.println(“” + new Random().nextInt(6)); System.out.println(new Random().nextInt(6)); //Appending empty char at start makes no difference } } 6 solved Why do I need a temporary variable to store the value of a Random method? [closed]
You are calling nextInt() without checking that there is an int to read. Probably that online test feeds non numbers to your program. You should call hasNextInt() before. 0 solved Why am I getting run time error for the following code when I submit on an online judge? [closed]
You already import java.util.Arrays why not use that to print out the sequence? Note: I removed the unnecessary import of java.util.Random (you can use revert back to using that if you want, and whatever num was for as I think that made everything more complicated than required. import java.util.Arrays; public class problem1 { public static … Read more
A quick search online reveals that the EntityClientPlayerMP has a constructor: EntityClientPlayerMP(Minecraft par1Minecraft, World par2World, Session par3Session, NetClientHandler par4NetClientHandler) Since that is the only constructor, creating a new object of that class will require you call it with that. solved Java threading error [closed]
Try out this: ^(\d)\1*$ or try this ^([0-9])\1*$ please modify the above regex according to your problem.pattern matching if the user enters same digit. \1 matches the first capture group, so the pattern matches whether the digits are repeated in the string. 0 solved Regular Expression to count number of pairs in a string [closed]
This works: public class Main { public static void main(String args[]) { int n = 6; while (n > 0) { for (int i = 1; i <= n; i++) { System.out.print(i); } for (int i = n; i > 0; i–) { System.out.print(i); } System.out.println(“”); n–; } } } The second for loop assigns … Read more