how to reverse a string in java
public class ReverseString {
public static void main(String[] args) {
String s1 = "neelendra";
for(int i=s1.length()-1;i>=0;i--)
{
System.out.print(s1.charAt(i));
}
}
}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);
}java string reverse
String rev = new StringBuilder("Your String").reverse().toString();reverse string array java
//java program to reverse array using for loop
public class ReverseArrayDemo
{
public static void main(String[] args)
{
int[] arrNumbers = new int[]{2, 4, 6, 8, 10};
System.out.println("Given array: ");
for(int a = 0; a < arrNumbers.length; a++)
{
System.out.print(arrNumbers[a] + " ");
}
System.out.println("Reverse array: ");
// looping array in reverse order
for(int a = arrNumbers.length - 1; a >= 0; a--)
{
System.out.print(arrNumbers[a] + " ");
}
}
}Reverse a string in java
// reverse a string using ByteArray
class ReverseStringByteArray
{
public static void main(String[] args)
{
String input = "HelloWorld";
// getBytes() method to convert string into bytes[].
byte[] strByteArray = input.getBytes();
byte[] output = new byte[strByteArray.length];
// store output in reverse order
for(int a = 0; a < strByteArray.length; a++)
output[a] = strByteArray[strByteArray.length - a - 1];
System.out.println(new String(output));
}
}reverse string array java
import java.util.Arrays;
public class ReverseStringArrayInJava
{
public static void main(String[] args)
{
String[] strHierarchy = new String[]{"Junior Developer","Senior Developer","Team Lead","Project Manager","Senior Manager","CEO"};
System.out.println("Given string array: " + Arrays.toString(strHierarchy));
for(int a = 0; a < strHierarchy.length / 2; a++)
{
String strTemp = strHierarchy[a];
strHierarchy[a] = strHierarchy[strHierarchy.length - a - 1];
strHierarchy[strHierarchy.length - a - 1] = strTemp;
}
System.out.println("Reversed string array: ");
for(int a = 0; a < strHierarchy.length; a++)
{
System.out.println(strHierarchy[a]);
}
}
}Copyright © 2021 Codeinu
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