![]() ![]() Exception in thread "main" : nullĪs Long.parseLong() can throw NullPointerException or NumberFormatException, it is a good practice to surround the function parseLong() with Java Try Catch and handle the exceptions accordingly. Both methods behave differently when we try to convert a long value that is greater than 32 bits to an int. However, we need to ensure that the long value we have can be stored entirely in the int since both have different memory limits, 32 bits vs 64 bits. Run the above program and parseLong() throws NullPointerException. These are the two commonly used methods to convert a long to an int in Java. Exception in thread "main" : For input string: "5.354"Īt java.base/(Unknown Source)Īt java.base/(Unknown Source)Īt StringToLong.main(StringToLong.java:12)Īlso, if null is passed to Long.parseLong(), the function throws NullPointerException. Run the above program and parseLong() throws NumberFormatException. Any value that is outside the range will make parseLong() to throw this error. This is a static method of Math class of java. A number that is out of range for a long value. Here, we can use the built-in Math class method which is Math.toIntExac() to convert a long to an int in Java.If the string contains invalid characters that does not parse to a long value.Some of the scenarios that could throw this error are: You ask for quickest, but perhaps you mean 'best' or 'correct' or 'typical' You also ask for commas to indicate thousands, but perhaps you mean 'in normal human readable form according to the local custom of your user' You do it as so: int i 35634646 String s NumberFormat.getIntegerInstance (). In the following example program, we shall take a string which does not contain a valid long value. If you do not provide a valid string that is parsable long, Long.parseLong() throws NumberFormatException. Run the above program and the String is converted to Long. The equals operator implicitly converts the integer to. In this example, we shall use Long.parseLong() method and pass a string that can be parsed to a valid long value. We can use the assignment operator () to convert the lower (integer) to the higher data type (long). Long.parseLong(str) parses any parsable long value from string to long value. Convert string to long using Long.parseLong() In this tutorial, we shall learn some of the ways of how to convert a string value to a long value with examples. Some of them are using Long.parseLong(), Long.valueOf(), new Long(). ![]() You can typecast or convert a String to Long in Java in many ways.
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