Java - Double longValue() method



Description

The Java Double longValue() method returns the long value of this Double object.

Declaration

Following is the declaration for java.lang.Double.longValue() method

public long longValue()

Parameters

NA

Return Value

This method returns the long value represented by this object.

Exception

NA

Example 1

The following example shows the usage of Double longValue() method to get a long primitive value of given positive Double object. We've initialized a Double object with a given positive long value. Then using longValue() method, we're printing its value.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
      Double d = new Double("15.30");
   
      //return the long value
      System.out.println("Value = " + d.longValue());
   }
} 

Output

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

Value = 15

Example 2

The following example shows the usage of Double longValue() method to get a long primitive value of given negative Double object. We've initialized a Double object with a given positive long value. Then using longValue() method, we're printing its value.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
      Double d = new Double("-15.30");
   
      //return the long value
      System.out.println("Value = " + d.longValue());
   }
} 

Output

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

Value = -15

Example 3

The following example shows the usage of Double longValue() method to get a long primitive value of given negative Double object of zero value. We've initialized a Double object with a given positive long value. Then using longValue() method, we're printing its value.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
      Double d = new Double("-0.0");
   
      //return the long value
      System.out.println("Value = " + d.longValue());
   }
} 

Output

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

Value = 0

Example 4

The following example shows the usage of Double longValue() method to get a long primitive value of given positive Double object of zero value. We've initialized a Double object with a given positive long value. Then using longValue() method, we're printing its value.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
      Double d = new Double("+0.0");
   
      //return the long value
      System.out.println("Value = " + d.longValue()); 
   }
} 

Output

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

Value = 0
java_lang_double.htm
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