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;
}
}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);
}Copyright © 2021 Codeinu
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