Java.lang.Long.getLong(String nm) Method

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Description

The java.lang.Long.getLong(String nm) method determines the long value of the system property with the specified name.If there is no property with the specified name, if the specified name is empty or null, or if the property does not have the correct numeric format, then null is returned.

Declaration

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

public static Long getLong(String nm)

Parameters

nm − This is the property name.

Return Value

This method returns the Long value of the property.

Exception

NA

Example

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) {

      // determines the Long value of the system property 
      String str = "sun.arch.data.model";
      System.out.println(Long.getLong(str));
   
      // prints null
      str = "lang";
      System.out.println(Long.getLong(str));
   }
}  

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

64
null