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Java 2021-11-18 20:22:24
convert hashset to array
// First of all, you shouldn't use raw types. // Use : Set<Integer> set = new HashSet<>(); set.add(4); set.add(1); // Then convert to array : Integer[] arr = x.toArray(new Integer[set.size()]); // Using x.toArray() would give you an Object[]. Add solution -
Other 2021-11-18 19:39:18
https://stackoverflow.com/questions/27420014/how-to-filter-json-object
public class Test { public static void main(String[] args) throws Exception { Type type = new TypeToken<List<Student>>() {}.getType(); Gson gson = new GsonBuilder().registerTypeAdapter(type, new Student.StudentListDeseria... Add solution -
Java 2021-11-14 07:17:24
when to use collections in java
LIST: Can store duplicate values, Keeps the insertion order. It allows multiple null values, Also we can read a certain value by index. - ArrayList not syncronized, array based class - LinkedList not synchronized, doubly linked - Vect... Add solution -
Java 2021-11-13 10:21:19
java program to print unique words in a sentence
import java.util.Arrays; import java.util.HashSet; /** * Java Program - Find Unique Words */ public class Example { public static void main(String[] args) {  ... Add solution -
Other 2021-11-11 01:09:10
linkedhashset first element
linkedhashset.stream().findFirst().get(); Add solution -
Java 2021-11-07 12:13:09
java count frequency of characters in a string
+++METHOD WITH NONDUP+++ public static String FrequencyOfChars(String str) { String nonDup = ""; for(int i=0; i < str.length(); i++) if(!nonDup.contains(""+str.charAt(i))) nonDup+= ""+str.charAt(i); String expectedRe... Add solution