String Concatenation by concat() method.

You can concatenate two strings using the concat() method of the String class. This class concatenates the specified string to the end of this string.

Example

public class Test {
   public static void main(String args[]){
      String str1 = "Krishna";
      String str2 = "Kasyap";
      System.out.println(str1.concat(str2));
   }
}

Output

krishnaKasyap