Este artículo analiza diferentes formas de invertir una string en Java con ejemplos.
Ejemplos:
Java
// java program to reverse a word
import java.io.*;
import java.util.Scanner;
class GFG {
public static void main (String[] args) {
String str= "Geeks", nstr="";
char ch;
System.out.print("Original word: ");
System.out.println("Geeks"); //Example word
for (int i=0; i<str.length(); i++)
{
ch= str.charAt(i); //extracts each character
nstr= ch+nstr; //adds each character in front of the existing string
}
System.out.println("Reversed word: "+ nstr);
}
}
//Contributed by Tiyasa
Java
// Java program to ReverseString using ByteArray.
import java.lang.*;
import java.io.*;
import java.util.*;
// Class of ReverseString
class ReverseString {
public static void main(String[] args)
{
String input = "GeeksforGeeks";
// getBytes() method to convert string
// into bytes[].
byte[] strAsByteArray = input.getBytes();
byte[] result = new byte[strAsByteArray.length];
// Store result in reverse order into the
// result byte[]
for (int i = 0; i < strAsByteArray.length; i++)
result[i] = strAsByteArray[strAsByteArray.length - i - 1];
System.out.println(new String(result));
}
}
Java
// Java program to ReverseString using StringBuilder
import java.lang.*;
import java.io.*;
import java.util.*;
// Class of ReverseString
class ReverseString {
public static void main(String[] args)
{
String input = "Geeks for Geeks";
StringBuilder input1 = new StringBuilder();
// append a string into StringBuilder input1
input1.append(input);
// reverse StringBuilder input1
input1.reverse();
// print reversed String
System.out.println(input1);
}
}
Java
// Java program to Reverse a String by
// converting string to characters one
// by one
import java.lang.*;
import java.io.*;
import java.util.*;
// Class of ReverseString
class ReverseString {
public static void main(String[] args)
{
String input = "GeeksForGeeks";
// convert String to character array
// by using toCharArray
char[] try1 = input.toCharArray();
for (int i = try1.length - 1; i >= 0; i--)
System.out.print(try1[i]);
}
}
Java
// Java program to Reverse a String using swapping
// of variables
import java.lang.*;
import java.io.*;
import java.util.*;
// Class of ReverseString
class ReverseString {
public static void main(String[] args)
{
String input = "Geeks For Geeks";
char[] temparray = input.toCharArray();
int left, right = 0;
right = temparray.length - 1;
for (left = 0; left < right; left++, right--) {
// Swap values of left and right
char temp = temparray[left];
temparray[left] = temparray[right];
temparray[right] = temp;
}
for (char c : temparray)
System.out.print(c);
System.out.println();
}
}
Java
// Java program to Reverse a String using ListIterator
import java.lang.*;
import java.io.*;
import java.util.*;
// Class of ReverseString
class ReverseString {
public static void main(String[] args)
{
String input = "Geeks For Geeks";
char[] hello = input.toCharArray();
List<Character> trial1 = new ArrayList<>();
for (char c : hello)
trial1.add(c);
Collections.reverse(trial1);
ListIterator li = trial1.listIterator();
while (li.hasNext())
System.out.print(li.next());
}
}
Java
// Java program to demonstrate conversion from
// String to StringBuffer and reverse of string
import java.lang.*;
import java.io.*;
import java.util.*;
public class Test {
public static void main(String[] args)
{
String str = "Geeks";
// conversion from String object to StringBuffer
StringBuffer sbr = new StringBuffer(str);
// To reverse the string
sbr.reverse();
System.out.println(sbr);
}
}
Java
/*package whatever //do not write package name here */
import java.io.*;
import java.util.Scanner;
class GFG {
public static void main (String[] args) {
Scanner scanner = new Scanner(System.in);
String Str = scanner.nextLine();
char[] arr = Str.toCharArray();
String rev = "";
for(int i = Str.length() - 1; i >= 0; i--)
{
rev = rev + Str.charAt(i);
}
System.out.println(rev);
}
}
Publicación traducida automáticamente
Artículo escrito por GeeksforGeeks-1 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA