indexOf()

Example

Find the first occurrence of “planet” within a string.

String myStr = "Hello planet earth, you are a great planet.";
System.out.println(myStr.indexOf("planet"));

Definition and Usage

The indexOf() method retrieves the position of the first occurrence of specified character(s) within a string.

Tip: Utilize the lastIndexOf method to obtain the position of the last occurrence of specified character(s) within a string.

Syntax

“Choose one from the following options:”

public int indexOf(String str)

public int indexOf(String str, int fromIndex)

public int indexOf(int char)

public int indexOf(int char, int fromIndex)

Parameter Values

Technical Details

More Examples

Example

Locate the first instance of the letter “e” in a string, commencing the search from position 5.

public class Main {
  public static void main(String[] args) {
    String myStr = "Hello planet earth, you are a great planet.";
    System.out.println(myStr.indexOf("e", 5));
  }
}