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: Converting these strings to longs can simplify the comparison process and make the algorithm more efficient. 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. Why is there a need to convert string to long in java? 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. 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. java convert string to int using valueOf() Public static Integer valueOf(String str)Įxample Java String to Integer using valueOf method: It returns an Integer decimal interpretation of a String object so it is used to convert String to Integer. Integer.valueOf(String s) is a Java method of Integer class. Here we’ve got 111 in the first variant and 7 for the second. ParseInt of the String with radix parameter = 7 ("parseInt of the String with radix parameter = " + num2) Int num2 = Integer.parseInt(str, 2) //binary number Where str is a String you need to convert and radix is a base of the parsed numberĬonverting String to Integer, Java example using parseInt() Public static int parseInt(String str, int radix) throws NumberFormatException Public static int parseInt(String str) throws NumberFormatException ParseInt is a static method of the Integer class that returns an integer object representing the specified String parameter. Java string to int using Integer.parseInt(String) How to convert String to int in JavaHere is a couple of ways to convert string to int, Java lets do it using parseInt() and valueOf() methods. In this article we are going to discuss converting String to int (primitive type) and Object type (wrapper) Integer.
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