How to Java String substring in Go

The Java String substring function is used to extract a portion of a string. It takes two parameters: the starting index and the ending index of the substring. The starting index is inclusive, meaning the character at that index is included in the substring, while the ending index is exclusive, meaning the character at that index is not included in the substring. If only the starting index is provided, the substring will include all characters from that index to the end of the string. The substring function returns a new string that contains the extracted portion of the original string. Keep reading below to learn how to Java String substring in Go.

Java String substring in Go With Example Code

Java developers who are transitioning to Go may find themselves wondering how to perform certain tasks in the new language. One such task is Java’s String substring method. In this post, we’ll explore how to achieve the same functionality in Go.

In Java, the substring method is used to extract a portion of a string. It takes two arguments: the starting index and the ending index (exclusive) of the substring. For example, the following code extracts the substring “world” from the string “Hello world”:

String str = "Hello world";
String substr = str.substring(6, 11); // "world"

In Go, we can achieve the same result using string slicing. Slicing a string returns a new string that contains a portion of the original string. The syntax for slicing a string is as follows:

newStr := str[startIndex:endIndex]

where startIndex is the index of the first character to include in the new string, and endIndex is the index of the first character to exclude from the new string. For example, to extract the substring “world” from the string “Hello world” in Go, we can use the following code:

str := "Hello world"
substr := str[6:11] // "world"

Note that the endIndex argument is exclusive, just like in Java’s substring method.

In addition to specifying the startIndex and endIndex arguments explicitly, we can also omit one or both of them. If we omit the startIndex argument, Go assumes that we want to start at the beginning of the string. If we omit the endIndex argument, Go assumes that we want to include all characters up to the end of the string. For example, the following code extracts the substring “Hello” from the string “Hello world” in Go:

str := "Hello world"
substr := str[:5] // "Hello"

Similarly, the following code extracts the substring “world” from the string “Hello world” in Go:

str := "Hello world"
substr := str[6:] // "world"

In conclusion, while Go doesn’t have a substring method like Java, we can achieve the same functionality using string slicing. By specifying the startIndex and endIndex arguments, we can extract any portion of a string that we need.

Equivalent of Java String substring in Go

In conclusion, the Go programming language provides a similar function to Java’s String substring function. The Go function is called “substring” and it allows developers to extract a portion of a string based on a starting and ending index. While the syntax may differ slightly from Java, the functionality is essentially the same. This makes it easy for developers who are familiar with Java to transition to Go and continue to work with strings in a similar way. Overall, the substring function in Go is a useful tool for manipulating strings and is a great addition to the language’s string handling capabilities.