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The Java String charAt() method returns the character at the specified index. The index value should lie between 0 and length() – 1. Let us check more points about the String charAt() method in Java.
Syntax of charAt() Java method
public char charAt(int index)
Parameters
Return Type
Exceptions
Example of Java String charAt()
The following examples demonstrate how to use charAt() method:
Example 1:
To show the working of the charAt() method
public
static
void
main(String args[])
String s =
"Welcome! to Geeksforgeeks Planet"
;
char
ch = s.charAt(
3
);
System.out.println(ch);
ch = s.charAt(
0
);
System.out.println(ch);
Output
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 4
at java.lang.String.charAt(String.java:658)
at Gfg.main(File.java:9)
Programs for charAt Java Method
1. Accessing the First and Last Character using the charAt() Java method
2. Print Characters Presented at Odd Positions and Even Positions using charAt() Java method
// Java Program to implement
// Print Characters Presented at
// Odd Positions and Even Positions
import
java.io.*;
// Driver Class
class
GFG {
// main function
public
static
void
main(String[] args)
String str =
"GeeksforGeeks"
;
// Odd Positions
System.out.println(
"Odd Positions"
);
for
(
int
i =
0
; i < str.length(); i +=
2
) {
System.out.print(str.charAt(i));
System.out.println(
"\n"
);
// Even Positions
System.out.println(
"Even Positions"
);
for
(
int
i =
1
; i < str.length(); i +=
2
) {
System.out.print(str.charAt(i));
for
(
int
i =
0
; i < str.length(); i++) {
// Counting e in string
if
(str.charAt(i) ==
'e'
)
count++;
// printing occurrence
System.out.println(
"Count the occurrence of e : "
+ count);
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