Java.lang.Long.getLong() Method



The java.lang.Long.getLong(String nm, Long val) method determines the Long value of the system property with the specified name.The first argument nm is treated as the name of a system property.

The second argument val is the default value. A Long object that represents the value of the second argument is returned if there is no property of the specified name, if the property does not have the correct numeric format, or if the specified name is empty or null.


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

public static Long getLong(String nm, Long val)


  • nm -- This is the property name.

  • val -- This is the default value.

Return Value

This method returns the Long value of the property.


  • NA


The following example shows the usage of java.lang.Long.getLong() method.

package com.tutorialspoint;

import java.lang.*;

public class LongDemo {

   public static void main(String[] args) {

     Long v = new Long(65760);
     /* returns the Long value of the system property and won't 
     print default specified value as specified system property exits */
     String str = "";
     System.out.println(Long.getLong(str, v));

     /* returns default specified value as system property "java" 
     does not exist */ 
     System.out.println(Long.getLong("java", v));

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