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 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));
}
}Copyright © 2021 Codeinu
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