How to convert Set containing values into string
algorithm, collections, hashset, java, set
Solution
public static void main(String[] args) {
// TODO Auto-generated method stub
String str = "abcdaa";
dups(str);
}
public static void dups(String str) {
HashSet<Character> hs = new HashSet<Character>();
char[] ch = str.toCharArray();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < ch.length; i++) {
if(hs.add(ch[i])){
sb.append(ch[i]);
}
}
System.out.println(sb);
}
EDIT
public static void dups(String str) {
HashSet<Character> hs = new HashSet<Character>();
StringBuilder sb = new StringBuilder();
for (Character character : str.toCharArray()) {
if(hs.add(character)){
sb.append(character);
}
}
System.out.println(sb);
}
I can't think a better way to do this... It's better use StringBuilder instead of String, check this answer https://stackoverflow.com/a/1532483/6949032
Problem
``` public static void main(String[] args) { // TODO Auto-generated method stub String str = "abcdaa"; dups(str); } public static void dups(String str){ HashSet hs = new HashSet(); char[] ch = str.toCharArray(); for(int i=0; i < ch.length;i++){ hs.add(ch[i]); } System.out.println(hs); } ``` The above code return Output: [a,b,c,d] But I want to print the Set values into a string so I can return a string value return value looks like this:Expected Output: abcd