charAt() method
Java string method charAt() will provide you with the char value at the specific index value. This index starts from 0 to n-1 value, where n denotes the length of the string. If the provided index is greater than the string length or has a negative value then the StringIndexOutOfBoxException will get raised.
Method implementation-
public char charAt(int index) {
if ((index < 0) || (index >= value.length)) {
throw new StringIndexOutOfBoundsException(index);
}
return value[index];
}
Method syntax-
public char charAt(int index)
Example-
public class Simple{
public static void main(String args[])
{
String name="Welcome";
char ch=name.charAt(4);
System.out.println(ch);
}
}
Output-
Example with Exception-
public class Simple
{
public static void main(String args[]){
String name="Welcome";
char ch=name.charAt(10);
System.out.println(ch);
}
}
Example using the string length-
public class Simple {
public static void main(String[] args) {
String str = "Welcome to Java";
int len = str.length();
System.out.println("0 index is: "+ str.charAt(0));
System.out.println("last index is: "+ str.charAt(len-1));
}
}
Output-
