How to Java String indexOf in Go

The Java String indexOf function is a method that returns the index of the first occurrence of a specified character or substring within a given string. It takes one or two arguments, the first being the character or substring to search for, and the second being an optional starting index from which to begin the search. If the character or substring is found, the method returns the index of its first occurrence within the string. If it is not found, the method returns -1. This function is useful for searching and manipulating strings in Java programs. Keep reading below to learn how to Java String indexOf in Go.

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Java String indexOf in Go With Example Code

Java developers who are transitioning to Go may find themselves looking for the equivalent of Java’s String indexOf method. Fortunately, Go provides a similar function that can be used in its place.

The Go equivalent of Java’s String indexOf method is the strings.Index function. This function takes two arguments: the string to search in, and the string to search for. It returns the index of the first occurrence of the search string in the search string, or -1 if the search string is not found.

Here is an example of how to use the strings.Index function in Go:

package main


import (

    "fmt"

    "strings"

)

func main() { str := "Hello, world!" index := strings.Index(str, "world") fmt.Println(index) }

In this example, the strings.Index function is used to search for the string “world” in the string “Hello, world!”. The function returns the index of the first occurrence of “world” in the string, which is 7.

By using the strings.Index function, Java developers can easily transition to Go and continue to perform string searches in their code.

Equivalent of Java String indexOf in Go

In conclusion, the equivalent function of Java’s String indexOf in Go is the strings.Index function. This function returns the index of the first occurrence of a substring within a given string. It also allows for the specification of a starting index for the search, making it a versatile tool for string manipulation in Go. By understanding the similarities and differences between these two functions, developers can easily transition between Java and Go programming languages and efficiently manipulate strings in their code.