String Character Extraction charAt() method in Java?

1. Java String Handling

2. Introduction

3. String Constructors

4. String(char chars[], int startIndex, int len)

5. String(String s) method

6. String(byte asciiChars[])

7. String(byte asciiChars[], int startIndex, int len)

8. String length()

9. String Operations

10. String Conversion and toString()

11. Character Extraction

12. charAt() method

13. getChars() method

14. getByte() method

15. toCharArray() method

16. String Comparison

17. Searching Strings

18. Modifying a String

19. Changing the case of Characters

20. StringBuffer

21. Constructors in StringBuffer:

22. Methods used in StringBuffer

23. Some other important methods are:

24. insert() method in String Handling

25. reverse() method in java

26. substring() method

The String Character Extraction: charAt() method To extract a single character from a String by using charAt() method.
The syntax is as follows:
char charAt(int position)
Where the position is the index of character that you want to obtain.

/* Syntax of charAt() method or Internal implementation of charAt() method*/

public char charAt(int index) 
{  
   if ((index < 0) || (index >= value.length)) 
   {  
    throw new StringIndexOutOfBoundsException(index);  
   }  
   return value[index];  
}  


 

This method returns the character at the specified position.
for example:
char h;
h =“Heera”.charAt(1);
Assigns the value ‘e’ to h.

The charAt() method returns the character at the specified index in a java string.

/* Example: */

public class CharAtExampleByHeera
{  
 public static void main(String args[])
 {  
  String name="Heera";  
  char ch=name.charAt(4);
  //it returns the char value at the 4th index  
  System.out.println(ch); 
  // char at 0 index is H, So output will be "r"
 }
}