convert string to long java example - Brave Search

How to convert String to long in Java?

stackoverflow.com › questions › 7693324 › how-to-convert-string-to-long-in-java

Use Long.parseLong()

Copy Long.parseLong("0", 10)        // returns 0L
 Long.parseLong("473", 10)      // returns 473L
 Long.parseLong("-0", 10)       // returns 0L
 Long.parseLong("-FF", 16)      // returns -255L
 Long.parseLong("1100110", 2)   // returns 102L
 Long.parseLong("99", 8)        // throws a NumberFormatException
 Long.parseLong("Hazelnut", 10) // throws a NumberFormatException
 Long.parseLong("Hazelnut", 36) // returns 1356099454469L
 Long.parseLong("999")          // returns 999L

Answer from Mike Christensen on Stack Overflow

geeksforgeeks.org › java › java-program-to-convert-string-to-long

Java Program to Convert String to Long - GeeksforGeeks

July 23, 2025 - Long.parseLong() method to convert a string to a primitive long. ... // Java Program to convert String to Long using parseLong() Method public class GFG { public static void main(String args[]) { // Creating a custom string String s = ...

stackoverflow.com › questions › 7693324 › how-to-convert-string-to-long-in-java

How to convert String to long in Java? - Stack Overflow

Use Long.parseLong()

Copy Long.parseLong("0", 10)        // returns 0L
 Long.parseLong("473", 10)      // returns 473L
 Long.parseLong("-0", 10)       // returns 0L
 Long.parseLong("-FF", 16)      // returns -255L
 Long.parseLong("1100110", 2)   // returns 102L
 Long.parseLong("99", 8)        // throws a NumberFormatException
 Long.parseLong("Hazelnut", 10) // throws a NumberFormatException
 Long.parseLong("Hazelnut", 36) // returns 1356099454469L
 Long.parseLong("999")          // returns 999L

To convert a String to a Long (object), use Long.valueOf(String s).longValue();

See link

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theserverside.com › blog › Coffee-Talk-Java-News-Stories-and-Opinions › String-to-long-in-Java

String to long in Java

The benefits of the parseLong(String) method to convert a String to a long or int in Java instead of the valueOf(String) or the deprecated contructor method include: The Long.parseLong() method returns a long primitive, not a wrapper.

java67.com › 2015 › 07 › how-to-parse-string-to-long-in-java.html

How to convert String to long in Java? Example | Java67

You can also use the constructor of the Long class which accepts a String and returns a Long object, but internally it also uses the parseLong() method. BTW, if you have just started learning Java or looking forward to learning Java from scratch, I suggest you take a look at Cay S. Horstmann's Core Java Volume 1, 9th Edition book. You will learn most of the Java fundamentals in a quick time. There are three main ways to convert a numeric String to Long in Java, though internally all of them use the parseLong() method to parse numeric String to Long value.

java67.com › 2015 › 07 › how-to-convert-long-value-to-string-in-java-example.html

How to convert long to String in Java? Example | Java67

Here is our sample Java program for this data type conversion. In this program, you will learn all these three methods of converting primitive long to String in Java.

javarevisited.blogspot.com › 2012 › 12 › how-to-convert-string-to-long-in-java-4-examples.html

4 Ways to Convert String to long in Java? Example Tutorial

In this Java tutorial, we will learn 4 different ways to convert String to long by code examples and we will also analyze the pros and cons of each approach.

beginnersbook.com › 2013 › 12 › how-to-convert-string-to-long-in-java

Java String to long Conversion

public class JavaExample { public ...intln("nInvalid String to long Conversion:"); convertStringToLong(invalidStr); } public static void convertStringToLong(String str) { try { long number = Long.parseLong(str); System.out.println("The long value is: " + number); } catch ...

How to do in Java

howtodoinjava.com › home › string › convert string to long in java

Convert String to long in Java

January 8, 2023 - Java examples of converting a String to a long type using Long.parseLong(String), Long.valueOf(String) and new Long(String) constructor.

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makeinjava.com › home › convert string variable to long in java (example)

Convert String variable to Long in java (example)

January 4, 2024 - String str = "12345"; Long longObject = Long.valueOf(str); System.out.println("Using valueOf(): " + longObject); //Next Example String str4 = "0"; Long longObject2 = Long.valueOf(str4); System.out.println("Using valueOf(): " + longObject2); Java’s Scanner class provides the facility to structured ...

baeldung.com › home › java › java string › convert string to long or long in java

Convert String to long or Long in Java | Baeldung

January 10, 2024 - Given our String, we can use the overloaded Long constructor that takes a String as an argument: ... This creates a new Long instance which can be converted to a primitive long by invoking the longValue() method.

theserverside.com › blog › Coffee-Talk-Java-News-Stories-and-Opinions › long-to-String-in-Java

long to String in Java

The easiest way to convert a long to a String is to append it to double quote. However, for complex output where a long must be embedded in a Java String, use the printf or String.format method.

scaler.com › home › topics › string to long in java

Convert String to Long in Java - Scaler Topics

June 30, 2022 - In the above example, we used the parseLong() function to convert a string composed of digits into a Long.

How to do in Java

howtodoinjava.com › home › string › convert long to string in java

Convert long to String in Java

January 10, 2023 - This value is exactly the one returned by the Long.toString(long) method given below. long number = 123456789L; String strValue = String.valueOf(number); //long to String conversion //Verify the result System.out.println(strValue); //123456789

stackoverflow.com › questions › 1854924 › how-to-convert-cast-long-to-string

java - How to convert / cast long to String? - Stack Overflow

See the reference documentation for the String class: String s = String.valueOf(date);

If your Long might be null and you don't want to get a 4-letter "null" string, you might use Objects.toString, like: String s = Objects.toString(date, null);

EDIT:

You reverse it using Long l = Long.valueOf(s); but in this direction you need to catch NumberFormatException

String strLong = Long.toString(longNumber);

Simple and works fine :-)

tutorialspoint.com › convert-from-string-to-long-in-java

Convert from String to long in Java

public class Demo { public static void main(String[] args) { String myStr = "5"; Long myLong = Long.parseLong(myStr); System.out.println("Long: "+myLong); } } ... The following is an example wherein we have used valueOf() and longValue() method to convert String to long.

docs.oracle.com › en › java › javase › 17 › docs › api › java.base › java › lang › Long.html

Long (Java SE 17 & JDK 17)

January 20, 2026 - ... Deprecated, for removal: This API element is subject to removal in a future version. It is rarely appropriate to use this constructor. Use parseLong(String) to convert a string to a long primitive, or use valueOf(String) to convert a string to a Long object.

Alvin Alexander

alvinalexander.com › java › edu › qanda › pjqa00011.shtml

How do I convert a String to a long with Java? | alvinalexander.com

public class StringToLong { public static void main (String[] args) { // String s = "fred"; // do this if you want an exception String s = "100"; try { long l = Long.parseLong(s.trim()); //<-- String to long here System.out.println("long l = " + l); } catch (NumberFormatException nfe) { ...

shecodes.io › athena › 58998-how-to-convert-a-string-to-a-long-in-java

[Java] - How to convert a String to a long in Java? - | SheCodes

Learn how to use the Long.parseLong() method in Java to convert a String to a long value and handle NumberFormatExceptions. ... How would you explain the purpose and usage of try, catch, throw, and finally blocks in a way that's easy to understand?

stackoverflow.com › questions › 9936648 › how-to-convert-string-to-long

java - How to convert string to long - Stack Overflow

This is a common way to do it:

long l = Long.parseLong(str);

There is also this method: Long.valueOf(str); Difference is that parseLong returns a primitive long while valueOf returns a new Long() object.

The method for converting a string to a long is Long.parseLong. Modifying your example:

String s = "1333073704000";
long l = Long.parseLong(s);
// Now l = 1333073704000

docs.oracle.com › en › java › javase › 20 › docs › api › java.base › java › lang › Long.html

Long (Java SE 20 & JDK 20)

July 10, 2023 - ... Deprecated, for removal: This API element is subject to removal in a future version. It is rarely appropriate to use this constructor. Use parseLong(String) to convert a string to a long primitive, or use valueOf(String) to convert a string to a Long object.