java remove duplicates
import java.util.*;
public class RemoveDuplicatesFromArrayList {
public static void main(String[] args) {
List<Integer> numbers = Arrays.asList(1,2,2,2,3,5);
System.out.println(numbers);
Set<Integer> hashSet = new LinkedHashSet(numbers);
ArrayList<Integer> removedDuplicates = new ArrayList(hashSet);
System.out.println(removedDuplicates);
}
}String remove duplicate method in java
public static void main(String[] args) {
String result = removeDup("AAABBBCCC");
System.out.println(result); // ABC
public static String removeDup( String str) {
String result = "";
for (int i = 0; i < str.length(); i++)
if (!result.contains("" + str.charAt(i)))
result += "" + str.charAt(i);
return result;
}
}java program to remove duplicate words in a string
String fullString = "lol lol";
String[] words = fullString.split("\\W+");
StringBuilder stringBuilder = new StringBuilder();
Set<String> wordsHashSet = new HashSet<>();
for (String word : words) {
if (wordsHashSet.contains(word.toLowerCase())) continue;
wordsHashSet.add(word.toLowerCase());
stringBuilder.append(word).append(" ");
}
String nonDuplicateString = stringBuilder.toString().trim();how to remove duplicates from an array java
// Must sort arrays first --> Arrays.sort(arrayName)
public class RemoveDuplicateInArrayExample{
public static int removeDuplicateElements(int arr[], int n){
if (n==0 || n==1){
return n;
}
int[] temp = new int[n];
int j = 0;
for (int i=0; i<n-1; i++){
if (arr[i] != arr[i+1]){
temp[j++] = arr[i];
}
}
temp[j++] = arr[n-1];
// Changing original array
for (int i=0; i<j; i++){
arr[i] = temp[i];
}
return j;
}
public static void main (String[] args) {
int arr[] = {10,20,20,30,30,40,50,50};
int length = arr.length;
length = removeDuplicateElements(arr, length);
//printing array elements
for (int i=0; i<length; i++)
System.out.print(arr[i]+" ");
}
} java remove duplicates
public static <T> ArrayList<T> removeDuplicates(ArrayList<T> list){
Set<T> set = new LinkedHashSet<>(list);
return new ArrayList<T>(set);
}String remove duplicate in java
String str1 = "ABCDABCD";
String result1 = "";
for (int a = 0; a <= str1.length()-1; a++) {
if (result1.contains("" + str1.charAt(a))) {
// charAt methodda you provide index number ve sana character olarak donuyor,
// If the string result does not contains str.CharAt(i),
// then we concate it to the result. if it does we will not
continue;
}
result1 += str1.charAt(a);
}
System.out.println(result1);Copyright © 2021 Codeinu
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