Extracting Character
The charAt( ) method provides the character at the specified index position. The starting value of the index in the case of a string is zero. For example, in the following example, the character at position 3 in the string “ABCDEFG” is ‘D’. Thus, the str1.charAt(3) method will return the character ‘D’. Example:
Concatenation
You can concatenate two strings using concat( ). The concat( ) performs the same function as +. For example:
Program
Program Source
public class Javaapp { public static void main(String[] args) { String str = "ABCDEFG"; char c = str.charAt(3); System.out.println("c -> "+str.charAt(3)); String str1 = "ABCD"; String str2 = str1.concat("EFGH"); System.out.println("str2 -> "+str2); } }