September 24, 2024 - This method returns the index of the first occurrence of the specified substring, starting the search from the specified index. If the specified substring is not present there then it will return -1.

December 1, 2023 - You can use a second argument to start your search after a particular index number in the string. If the specified letter or letters cannot be found, indexOf() returns -1. Do you want to become a professional Java developer?

result = str1.indexOf("ava"); System.out.println(result); // 7 // substring not in the string · result = str1.indexOf("java"); System.out.println(result); // -1 // index of empty string in the string

August 19, 2022 - Java Platform: Java SE 8 · Syntax: ... represented by this object that is greater than or equal to fromIndex, or -1 if the character does not occur....

The indexOf(String target) method searches left-to-right inside the given string for a "target" string. The indexOf() method returns the index number where the target string is first found or -1 if the target is not found.

February 26, 2024 - The indexOf() method in Java is ... of the first occurrence of the specified character or substring. If it does not occur as a substring, -1 is returned....

indexOf(int ch): This method takes a single character (represented as an int in Java) and returns the index of the first occurrence of the specified character within the string. If the character is not found, it returns -1.

March 24, 2022 - Lastly, when we pass in a character or substring that doesn't exist in a string, the indexOf method will return a value of -1.

Java Examples Java Videos Java Compiler Java Exercises Java Quiz Java Code Challenges Java Practice Problems Java Server Java Syllabus Java Study Plan Java Interview Q&A ... String myStr = "Hello planet earth, you are a great planet."; System.out.println(myStr.indexOf("planet"));

Answer: The [code ]indexOf()[/code] method in Java is a method of the [code ]String[/code] class that returns the index (position) of the first occurrence of a specified string or character within a string. It returns -1 if the specified string or character is not found. The syntax for using this...

November 18, 2023 - The indexOf() method is a member ... which represents the position of the character or substring. If the character or substring is not found, the method returns -1....

This method returns the index within this string of the first occurrence of the specified character or -1, if the character does not occur. ... See the description. import java.io.*; public class Test { public static void main(String args[]) ...

Following is the declaration for java.util.Vector.indexOf() method ... The method call returns the index of the first occurrence of the object argument in this vector at position index or later in the vector.

August 19, 2024 - In this example, the indexOf() method returns 0 for the first occurrence of 42 and -1 for 100 since it is not present in the list.

May 6, 2025 - An int value reflecting the index of the character’s first occurrence in the string, or -1 if it never occurs. ... The indexof() method searches the supplied Substring beginning at the beginning of the string.

August 4, 2025 - The indexOf() method is part of the String class in Java. It returns the index of the first occurrence of a specified character or substring. If the character or substring isn’t found, it returns -1.

April 14, 2026 - These overload methods have been described below. ... This method returns the index of the character ‘c’ passed as parameter. If the specified character is not present in the string, the returned index would be -1.

November 19, 2024 - In this article, we will learn various ways to use indexOf() in Java. Example: Below is the simplest way that returns the index of the first occurrence of a specified character in a string, or -1 if the character does not occur.

December 17, 2024 - In this example, since 'x' does not appear in the sentence "This is a test", indexOf() returns -1, indicating the absence of the character. Sometimes, you might need to start your search from a specific position in the string.

December 26, 2024 - We used a while loop to iterate over all occurrences of the character or substring until the indexOf() method returns -1, which indicates that there are no more occurrences of the character or substring in the string.