Svetlyo Stoyanov stoyanovsh
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| public class ArraySort { | |
| public static void main(String[] args) { | |
| int[] array = {1, 3, 1, 2, 5, 2, 1, 3}; | |
| sort(array); | |
| for (int i : array) { | |
| System.out.print(i + " "); | |
| } |
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| import java.util.HashMap; | |
| import java.util.Map; | |
| public class MatchingChars { | |
| public static void main(String[] args) { | |
| String firstStr = "abca"; | |
| String secondStr = "deaf"; | |
| String rslt = matchingChar(firstStr, secondStr); |
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| public class Numbers { | |
| public static void main(String[] args) { | |
| for (int i = 1; i <= 100 ; i++) { | |
| if(i % 3 == 0){ | |
| System.out.println("git"); | |
| }else if(i % 5 == 0){ | |
| System.out.println("hub"); | |
| }else { | |
| System.out.println(i); |
stoyanovsh
/ gist:95692bb4e08618b3516df97fa46c9a88
Created
March 12, 2021 21:39
— forked from psayre23/gist:c30a821239f4818b0709
Runtime Complexity of Java Collections
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| Below are the Big O performance of common functions of different Java Collections. | |
| List | Add | Remove | Get | Contains | Next | Data Structure | |
| ---------------------|------|--------|------|----------|------|--------------- | |
| ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array | |
| LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List | |
| CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array |