Easy way to reverse String

Question

Without going through the char sequence is there any way to reverse String in Java

Answer 1

You can use the StringBuilder#reverse() method:

String reverse = new StringBuilder(originalString).reverse().toString();

Answer 2

Try reverse() method:

StringBuilder stringName = new StringBuilder();
String reverse = stringName.reverse().toString();

Answer 3

If we have to do it:

Without going through the char sequence

One easy way with iteration will be:

public String reverse(String post) {                
    String backward = "";
    for(int i = post.length() - 1; i >= 0; i--) {
        backward += post.substring(i, i + 1);
    }        
    return backward;
} 

Answer 4

Using minimal API support. A simple algorithm.

static String reverse(String str) {
    char[] buffer = str.toCharArray();
    for (int i = 0; i < buffer.length/2; ++i){
        char c = buffer[i];
        buffer[i] = buffer[buffer.length-1-i];
        buffer[buffer.length-1-i] = c;
    }
    return new String(buffer);
}

Answer 5

public class RevString {
  public static void main(String[] args) {
    String s="jagan";
    String rev="";
    for (int i=s.length()-1;i>=0;i--) {
      rev=rev+s.charAt(i);
    }
     System.out.println("Reverse String is: "+rev);
  }
}

Answer 6

Try this,

String s = "responses";
StringBuilder builder = new StringBuilder(s);
System.out.println(builder.reverse());