Java - Long decode() method

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Description

The Java Long decode() method decodes a String into an Long. It accepts decimal, hexadecimal, and octal number.

Declaration

Following is the declaration for java.lang.Long.decode() method

 public static Long decode(String nm) throws NumberFormatException 

Parameters

nm − This is the String to decode.

Return Value

This method returns an Long object holding the long value represented by nm .

Exception

NumberFormatException − if the String does not contain a parsable integer.

Getting Long from a String Containing Decimal Number Example

The following example shows the usage of Long decode() method to get a Long object from a string containing decimal number. We've created a String variable and assign it a string containing decimal number. Then using decode method, we're obtaining the Long object and printing it.

 package com.tutorialspoint; public class LongDemo { public static void main(String[] args) { String str = "50"; /* returns an Long object holding the long value represented by string str */ System.out.println("Number = " + Long.decode(str)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 Number = 50 

Getting Long from a String Containing Negative Decimal Number Example

The following example shows the usage of Long decode() method to get a Long object from a string containing a negative decimal number. We've created a String variable and assign it a string containing a negative decimal number. Then using decode method, we're obtaining the Long object and printing it.

 package com.tutorialspoint; public class LongDemo { public static void main(String[] args) { String str = "-50"; /* returns an Long object holding the long value represented by string str */ System.out.println("Number = " + Long.decode(str)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 Number = -50 

Getting Long from a String Containing Octal Number Example

The following example shows the usage of Long decode() method to get a Long object from a string containing a octal number. We've created a String variable and assign it a string containing an octal number. Then using decode method, we're obtaining the Long object and printing it.

 package com.tutorialspoint; public class LongDemo { public static void main(String[] args) { String str = "0x3"; /* returns an Long object holding the long value represented by string str */ System.out.println("Number = " + Long.decode(str)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 Number = 3 

Getting Long from a String Containing HexaDecimal Number Example

The following example shows the usage of Long decode() method to get a Long object from a string containing a hexadecimal number. We've created a String variable and assign it a string containing a hexadecimal number. Then using decode method, we're obtaining the Long object and printing it.

 package com.tutorialspoint; public class LongDemo { public static void main(String[] args) { String str = "0xff"; /* returns an Long object holding the long value represented by string str */ System.out.println("Number = " + Long.decode(str)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 Number = 255