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Sep 10, 2017 · 2. One natural way to reverse a String is to use a StringTokenizer and a stack. Stack is a class that implements an easy-to-use last-in, first-out (LIFO) stack of objects. String s = "Hello My name is Sufiyan"; Put it in the stack frontwards. Stack<String> myStack = new Stack<>();
The function takes the first character of a String - str.charAt(0) - puts it at the end and then calls itself - reverse() - on the remainder - str.substring(1), adding these two things together to get its result - reverse(str.substring(1)) + str.charAt(0) When the passed in String is one character or less and so there will be no remainder left ...
Nov 27, 2017 · the idiomatic solution is. String reversed = new StringBuilder(str).reverse().toString(); If, perhaps for educational purposes, you want to solve this by streaming over the string’s characters, you can do it like. String reversed = str.chars() .mapToObj(c -> (char)c) .reduce("", (s,c) -> c+s, (s1,s2) -> s2+s1); This is not only much more ...
Mar 14, 2010 · Whats the best way to recursively reverse a string in Java? 22. Reverse a string in Java, in O(1)? 596.
Can anyone tell me how to write a Java program to reverse a given sentence? For example, if the input is: "This is an interview question" The output must be: "question interview an is this"
Reversing a Stream prior to Java version 21 without using a customized collection type is more verbose, typically requiring an extra line to reverse the resulting list. The following Java 20 implementation streams to a mutable ArrayList , reverses the list, and then streams the list using .stream() .
May 14, 2009 · Java recursion reverse string. 0. Reversing a String Using Recursion. 0. reverse string using recursion. 1 ...
Aug 2, 2016 · 3. Use StringBuilder class or StringBuffer class they have already a method reverse() for reversing the string. StringBuilder str = new StringBuilder("india"); System.out.println("string = " + str); // reverse characters of the StringBuilder and prints it. System.out.println("reverse = " + str.reverse()); // reverse is equivalent to the actual ...
Nov 7, 2014 · To reverse the array you only have to iterate half of the array and start swapping the element from start with end. swap element (position from start) with element (end position - position from start) String temp = reverse[i]; reverse[i] = reverse[reverse.length - 1 - i]; reverse[reverse.length - 1 - i] = temp;
Mar 9, 2014 · String array reverse Java. Ask Question Asked 10 years, 8 months ago. Modified 8 years, 4 months ago ...
