How to Javascript String lastIndexOf in Java

The lastIndexOf() function in JavaScript is a method that is used to search for a specified string within a given string and returns the index of the last occurrence of the specified string. It takes in a string as an argument and searches for the last occurrence of that string within the given string. If the specified string is found, the function returns the index of the last occurrence of the string. If the specified string is not found, the function returns -1. The lastIndexOf() function is useful when you need to find the position of the last occurrence of a specific character or substring within a string. Keep reading below to learn how to Javascript String lastIndexOf in Java.

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Javascript String lastIndexOf in Java With Example Code

JavaScript String lastIndexOf() is a method that returns the index of the last occurrence of a specified substring within a string. In Java, this method can be used by importing the JavaScript engine and calling the method on a string object.

To use the lastIndexOf() method in Java, first, we need to import the JavaScript engine using the following code:

import javax.script.ScriptEngineManager;

Next, we need to create an instance of the ScriptEngineManager and get the JavaScript engine using the following code:

ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("JavaScript");

Now, we can call the lastIndexOf() method on a string object using the following code:

String str = "Hello World!"; int lastIndex = (int) engine.eval("str.lastIndexOf('o')");

In the above code, we have created a string object “Hello World!” and called the lastIndexOf() method on it using the JavaScript engine. The method returns the index of the last occurrence of the character ‘o’ in the string, which is 7. We have cast the result to an integer using (int) as the eval() method returns an object.

In conclusion, the lastIndexOf() method in JavaScript can be used in Java by importing the JavaScript engine and calling the method on a string object. It is a useful method for finding the index of the last occurrence of a substring within a string.

Equivalent of Javascript String lastIndexOf in Java

In conclusion, the Java programming language provides a powerful and efficient way to search for the last occurrence of a character or substring within a string using the lastIndexOf() function. This function works similarly to its equivalent in JavaScript, but with some minor differences in syntax and behavior. By understanding how to use this function in Java, developers can easily manipulate strings and perform complex operations on them. Whether you are a beginner or an experienced Java programmer, mastering the lastIndexOf() function is an essential skill that can help you write more efficient and effective code.