Recent questions tagged java-collections

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2 answers

How to make a new List in Java?

Dec 28, 2020 in Java by anonymous
 • 8,910 points • 538 views
0 votes
1 answer

What are the differences between a HashMap and a Hashtable in Java?

Dec 21, 2020 in Java by Rajiv
 • 8,910 points • 878 views
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1 answer

Initialization of an ArrayList in one line.

Dec 21, 2020 in Java by Rajiv
 • 8,910 points • 5,370 views
0 votes
1 answer

When to use LinkedList over ArrayList in Java?

Dec 21, 2020 in Java by Roshni
 • 10,520 points • 1,700 views
0 votes
1 answer

Error:The method must override a superclass method after importing a project into Eclipse

Jul 28, 2020 in Java by kartik
 • 37,510 points • 1,665 views
0 votes
1 answer

How to resolve 'Must Override a Superclass Method' Errors after importing a project into Eclipse ?

Jan 10, 2019 in Java by Sushmita
 • 6,910 points • 3,986 views
0 votes
1 answer

Can anyone show how to implement SortByValue in Tree Map for Java ?

Dec 10, 2018 in Java by Rishabh
 • 3,620 points • 581 views
0 votes
1 answer

How do I implement a HttpURLConnection using a Proxy ?

Dec 10, 2018 in Java by Rishabh
 • 3,620 points • 10,003 views
0 votes
1 answer

Enums be subclassed to add new elements?

Aug 29, 2018 in Java by samarth295
 • 2,220 points • 513 views
0 votes
1 answer

Sort a HashMap in Java

Jul 13, 2018 in Java by samarth295
 • 2,220 points • 535 views
0 votes
1 answer

Iterating through a Collection, avoiding ConcurrentModificationException when removing in loop

Jul 3, 2018 in Java by developer_1
 • 3,320 points • 1,175 views
0 votes
1 answer

A Java collection of value pairs? (tuples?)

Jul 2, 2018 in Java by Sushmita
 • 6,910 points • 2,260 views
0 votes
1 answer

ThreadLocal variables usage in Java

Jun 30, 2018 in Java by misc.edu04
 • 1,450 points • 483 views
+1 vote
1 answer

Remove objects from an array in Java?

Jun 26, 2018 in Java by Daisy
 • 8,120 points • 1,017 views
0 votes
1 answer

using comparator for sorting in java

Jun 5, 2018 in Java by sharth
 • 3,370 points • 641 views
0 votes
1 answer

How to clone ArrayList and also clone its contents?

Jun 5, 2018 in Java by sharth
 • 3,370 points • 401 views
0 votes
1 answer

The best way to filter a Java Collection?

May 29, 2018 in Java by sharth
 • 3,370 points • 690 views
0 votes
1 answer

Use of Static Keyword in a Class

May 29, 2018 in Java by developer_1
 • 3,320 points • 485 views
0 votes
1 answer

How does contains() method work in evaluating objects?

May 25, 2018 in Java by developer_1
 • 3,320 points • 845 views
0 votes
2 answers

How do I use a Priority Queue

May 19, 2018 in Java by Parth
 • 4,630 points • 812 views
0 votes
1 answer

Convert comma-separated String to ArrayList?

May 17, 2018 in Java by Parth
 • 4,630 points • 2,884 views
0 votes
1 answer

How can I get Key from their respective Values

May 16, 2018 in Java by sharth
 • 3,370 points • 528 views
0 votes
2 answers

How can I sort values of a Map in Java using its key

May 16, 2018 in Java by sharth
 • 3,370 points • 989 views
0 votes
1 answer

How do I join 2 lists

May 10, 2018 in Java by Daisy
 • 8,120 points • 569 views
0 votes
2 answers

When to use LinkedList and ArrayList in Java?

May 9, 2018 in Java by Parth
 • 4,630 points • 903 views
0 votes
2 answers

Understand working of String Builder and String Buffer

May 9, 2018 in Java by Parth
 • 4,630 points • 879 views
0 votes
1 answer

Implement Tree(Datastructure) in Java

May 9, 2018 in Java by Daisy
 • 8,120 points • 1,279 views
0 votes
1 answer

Sorting an ArrayList in Java

May 5, 2018 in Java by anto.trigg4
 • 3,440 points • 1,998 views
0 votes
1 answer

Reflection: Explanation and Uses

May 2, 2018 in Java by Parth
 • 4,630 points • 555 views
0 votes
2 answers

Remove duplicate elements from an ArrayList in Java

Apr 30, 2018 in Java by developer_1
 • 3,320 points • 1,328 views
0 votes
1 answer

what are the ways in which a list can be iterated

Apr 23, 2018 in Java by developer_1
 • 3,320 points • 967 views
0 votes
1 answer

How can I Sort an ArrayList in Java

Apr 23, 2018 in Java by developer_1
 • 3,320 points • 716 views
0 votes
2 answers

How can I convert an 'ArrayList<String> to 'String[]' in Java

Apr 20, 2018 in Java by Parth
 • 4,630 points • 2,968 views
0 votes
2 answers

Performing Iteration over each entry in a 'Map'

Apr 17, 2018 in Java by Parth
 • 4,630 points • 866 views
0 votes
2 answers

Ho do I Iterate through a HashMap which contains duplicate values

Apr 16, 2018 in Java by Daisy
 • 8,120 points • 4,925 views

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