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

Question

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

for example:

    private static void /*methodName*/ () {                


        

Answer 1

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.

Answer 2

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.

Answer 3

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

Answer 4

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')

Answer 5

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.

Answer 6

1. String otherString = "helen" + character;

2. otherString +=  character;