It returns the long representation of the string argument as a decimal number. This is the most straightforward method to convert a string to a long. Long.parseLong(String s) method to convert string to long: There are several ways to convert a string to a long in Java:Ī thorough explanation of each strategy: 1. Four Methods for converting string to long in Java: long sumlink Long.parseLong (im ()) Here is the stacktrace. This method parses the string as a signed decimal long, and returns the resulting long value. trim () function is not making any difference. To convert a string to a long in Java, you can use the parseLong () method of the class. Here is the code to convert, where countstrng is the String I want to convert to long. I don't think it is beyond range of long at all. Modifying your example: String s '1333073704000' long l Long. Converting these strings to longs can simplify the comparison process and make the algorithm more efficient. I am trying to convert a string to long and it throws the NumberFormatException. The method for converting a string to a long is Long.parseLong. Algorithmic processing: In certain algorithms, you might need to compare strings that represent numbers, such as when sorting a list of strings that represent numerical values. In such cases, the data needs to be converted to a long when it is used in mathematical operations or comparisons.Ĥ. Storing numerical data: In some cases, it might be more convenient to store numerical data as a string, such as when working with data that needs to be displayed to the user. Converting the long to a string first can prevent these issues.ģ. This can result in loss of precision or unexpected results if the long value is large. ![]() String concatenation: In Java, when you concatenate a string with a long using the + operator, the long is automatically converted to a string. To perform mathematical operations or to compare the data with other numerical values, it needs to be converted to a numerical data type, such as a long.Ģ. Data input: When data is read from an external source, such as a file or a user input, it is often stored as a string. There are several reasons why you might need to convert a string to a long in Java:ġ. What you can do is format a long that holds 5 with a leading zero when you print it, see e.g. A string of characters like 05 is not an integer, 5 is. A long is supposed to store integers (the mathematical concept, not int), i.e. ![]() Why is there a need to convert string to long in java? You cannot because a long does not have a leading zero. In Java, there are several methods for converting a string into a long data type, such as Long.parseLong(String), Long.valueOf(String), Decimal Format class, and Long Constructor. This conversion is performed because some operations can only be performed on a long data type instead of a string data type. ![]() The size of the data does not affect this process. The process of converting a string into a long data type in Java refers to the transformation of the value of a string data type into a long data type.
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