java reverse a string
// Library approach
public static String solution(String str) {
// StringBuilder is not thread-safe, use StringBuffer
return new StringBuffer(str).reverse().toString();
}
// DIY approach
public static String solution(String str) {
char[] chars = str.toCharArray();
for(int i = 0, j = str.length() - 1; i < j; i++, j--) {
char ch = chars[i];
chars[i] = chars[j];
chars[j] = ch;
}
return new String(chars);
}Reverse a string in java
// reverse a string using reverse() method of StringBuilder class
class ReverseUsingReverseMethod
{
public static void main(String[] args)
{
String str = "Hello world Java";
StringBuilder sb = new StringBuilder();
// append string to StringBuilder
sb.append(str);
sb = sb.reverse();
// printing reversed String
System.out.println(sb);
}
}reverse a string in java
Solution 1
public static String StrReverse(String str) {
String reverse="";
for(int i=str.length()-1; i >= 0; i--)
reverse += str.toCharArray()[i];
return reverse;
}
Solution 2 (using string buffer)
public static String Reverse(String str) {
return new StringBuffer(str).reverse().toString());
}Reverse a string in java without using reverse function
// Reverse a string in java without using reverse function
import java.util.Scanner;
public class ReverseWithoutFunction
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Please enter a string: ");
String strInput = sc.nextLine();
int len = strInput.length();
String strReverse = "";
System.out.println("Reverse a string without using reverse function: ");
for(int a = len - 1; a >= 0; a--)
{
strReverse = strReverse + strInput.charAt(a);
}
System.out.println(strReverse);
sc.close();
}
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
