The indexOf() method returns the position of the first occurrence of specified character (s) in a string. Tip: Use the lastIndexOf method to return the position of the last occurrence of specified character …

2024年11月19日 · In Java, the String indexOf () method returns the position of the first occurrence of the specified character or string in a specified string. In this article, we will learn various ways to use …

The first occurrence of 'a' in the "Learn Java programming" string is at index 2. However, the index of second 'a' is returned when str1.indexOf('a', 4) is used.

2025年4月11日 · A quick example and explanation of the indexOf API of the standard String class in Java.

2025年3月17日 · The Java String class indexOf () method returns the position of the first occurrence of the specified character or string in a specified string.

2025年11月12日 · This blog post will provide a comprehensive guide to the indexOf method in Java, covering its fundamental concepts, usage methods, common practices, and best practices.

The Java indexOf Method is one of the String Methods that return the index position of the first occurrence of a specified string. If the specified string is not found, the indexOf method will return -1. …

2022年3月24日 · In this article, we'll see the syntax for the different indexOf methods. We'll also look at some examples to help you understand and use them effectively to find the index of a character or …

This method returns the index within this string of the first occurrence of the specified character or -1, if the character does not occur.

2025年7月23日 · indexOf (): This method returns the index within this string of the first occurrence of the specified character or -1 if the character does not occur.