#Convert string to long how to
#Convert string to long 64 Bit
#Convert string to long code

Use Long.parseLong() method to convert String to Long Its value lies in the range of (-263) to (263 -1)(inclusive).īelow are the 3 different approaches to convert a string to long in Java.

#Convert string to long 64 Bit

However, The long data type is a 64 bit two’s complement integer. String in Java is the object that is supported by the char array internally. Input: String = '100' īefore going to the 3 different ways for conversion of string to long in Java let’s take a simple introduction of String and Long. Below is the sample input and output for the program. We have a string, and our main task is to convert the given string to Long in Java. We will demonstrate 3 different ways for conversion of string to long in Java with the help of the programs.

#Convert string to long how to

In the next tutorial, we will learn how to convert long numeric value to a string in Java.In this tutorial, we will learn one of the very common requirements in Java applications i.e. Hope that you will have understood the basic methods of converting a string into a long. In this tutorial, you learned how to convert a string to long numeric value in Java using the following ways easily. (str + ' is not a valid numeric value.') Long num = decimalFormat.parse(str).longValue() Create an object of DecimalFormat class.ĭecimalFormat decimalFormat = new DecimalFormat('#')

#Convert string to long code

Program code 4: // Java Program to demonstrate the conversion of String into long using DecimalFormat class. Let’s create a Java program to convert a string to long numeric value using DecimalFormat class. We can also use in other way to parse a string into its numerical representation. This class is present in java.text package. Java provides a class called DecimalFormat that allows to convert a number to its string representation. Program code 3: // Java program to convert a string into a long using new Long(String).longValue().Ĭonverting String to Long using DecimalFormat Let’s create a Java program to convert String into a long object using longValue() method. Unboxing is a process by which we convert an object into its corresponding primitive data type. The longValue() method converts the long object into primitive long type value. Program code 2: // Java program to convert a string into a primitive long type using valueOf() method.Ĭonverting String to Long using new Long(String).longValue()Īnother alternative approach is to create an instance of Long class and then call longValue() method of Long class. Let’s write a Java program to convert a string into a long value using valueOf() method of Java Long wrapper class. We can invoke it using its class name.The general signature of valueOf() method is as below: public static Long valueOf(String str) It is a static utility method, so we do not need to create an object of class. The valueOf() method of Long class converts a string containing a long number into Long object and returns that object. We can also convert a string to long numeric value using valueOf() of Java long wrapper class. Call parseLong() method to convert a string to long value.Ĭonverting String to Long in Java using Long.valueOf() Program code 1: // Java program to convert a string into a primitive long type using parseLong() method. Let’s create a Java program to convert string to long in java using parseLong() of Java Long class. The parseLong() method throws an exception named NumberFormatException if the string does not contain a parsable long value. This method accepts a string containing the long representation to be parsed. The general signature of parseLong() method is as below: public static long parseLong(String s) We can call it simply using its class name. So, we do not need to create an object of class to call it. It reads long numeric values from the command-line arguments. The parseLong() of Long class is the static method. To convert string to a long, we use Long.parseLong() method provided by the Long class. Converting String to Long in Java using Long.parseLong() Let’s understand all four ways one by one with example programs. There are mainly four different ways to convert a string to wrapper Long class or primitive type long.

If entered data is a number in string form, we need to convert the string to a long to perform mathematical operations on it.

It is normally used when we want to perform mathematical operations on the string which contains a number.įor example, whenever we gain data from JTextField or JComboBox, we receive entered data as a string. There are some situations where we need to convert a number represented as a string into a long type in Java.