To get a substring from a string in Java up until a certain character, you can use the indexOf method to find the index of the character and then use the substring method to extract the substring. Here is an example of how you can do this: String s = "Hello, world!"; char...
In this code snippet, we first use thelastIndexOfmethod to find the index of the last period in the file name. If the file name contains at least one period, we extract the substring starting from the character after the last period to obtain the file extension. Otherwise, we print a m...
30 + Move left forward until the duplicate is removed. 31 + Track the max length. 32 + 33 + **/ 34 + 35 + 36 + class Solution { 37 + public int lengthOfLongestSubstring(String s) { 38 + int maxLength =0; 39 + HashSet<Character> charSet = new HashSet<>(); 40...
If a duplicate is found: Move left forward until the duplicate is removed. Track the max length. **/ class Solution { public int lengthOfLongestSubstring(String s) { int maxLength =0; HashSet<Character> charSet = new HashSet<>(); int left=0, right =0; for(right =0; right< s....
Initialize aHashMapthat stores the character count for each character in the current window. Iterate over the string and insert new characters in the HashMap until we have exactlyKdistinct characters in the HashMap. At this point, we have a window (subarray) that conforms to our criteria of...
Explanation: We can swap the first 'b' with the last 'a', or the last 'b' with the first 'a'. Then, the longest repeated character substring is "aaa", which its length is 3. Example 2: Input: text = "aaabaaa" Output: 6 ...
Find the length of the longest substringTof a given string (consists of lowercase letters only) such that every character inTappears no less thanktimes. Example 1: Input: s = "aaabb", k = 3 Output: 3 The longest substring is "aaa", as 'a' is repeated 3 times. ...
If you were doingnew String(str.substring)to force a copy of the character buffer, you can stop as soon as you update to the latest Java 7 (and you need to do that quite soon sinceJava 6 is being EOLd as we speak). Thankfully the development of Java is an open process and such...
import java.util.HashMap; class Solution { public String minWindow(String s, String t) { String res = ""; if(s==null || t==null || s.length()==0 || t.length()==0) return res; // HashMap<Character, Integer> countMap = new HashMap<>(); ...
Delimiter:It’s the character or the substring that needs to be looked for, to extract the remaining String as output. This value is case sensitive, so it should be specified as it appears in the actual String. n:Count of delimiter – i.e. the no of times the delimiter is to be sea...