[java] Append a single character to a string or char array in java?

Is it possible to append a single character to the end of array or string in java. Example:

private static void /*methodName*/ () {            
    String character = "a"
    String otherString = "helen";
    //this is where i need help, i would like to make the otherString become 
    // helena, is there a way to do this?               
}

public class lab {
public static void main(String args[]){
   Scanner input = new Scanner(System.in);
   System.out.println("Enter a string:");
   String s1;
   s1 = input.nextLine();
   int k = s1.length();
   char s2;
   s2=s1.charAt(k-1);
   s1=s2+s1+s2;
   System.out.println("The new string is\n" +s1);
   }
  }

Here's the output you'll get.

* Enter a string CAT The new string is TCATT *

It prints the the last character of the string to the first and last place. You can do it with any character of the String.

new StringBuilder().append(str.charAt(0))
                   .append(str.charAt(10))
                   .append(str.charAt(20))
                   .append(str.charAt(30))
                   .toString();

This way you can get the new string with whatever characters you want.

just add them like this :

        String character = "a";
        String otherString = "helen";
        otherString=otherString+character;
        System.out.println(otherString);

And for those who are looking for when you have to concatenate a char to a String rather than a String to another String as given below.

char ch = 'a';
String otherstring = "helen";
// do this
otherstring = otherstring + "" + ch;
System.out.println(otherstring);
// output : helena

You'll want to use the static method Character.toString(char c) to convert the character into a string first. Then you can use the normal string concatenation functions.

First of all you use here two strings: "" marks a string it may be ""-empty "s"- string of lenght 1 or "aaa" string of lenght 3, while '' marks chars . In order to be able to do String str = "a" + "aaa" + 'a' you must use method Character.toString(char c) as @Thomas Keene said so an example would be String str = "a" + "aaa" + Character.toString('a')