OptionalDouble equals() method in Java with examples
OptionalDouble help us to create an object which may or may not contain a Double value. The equals(Object obj) method help us to compare this OptionalDouble object with the passed object as a parameter and it returns true if objects are equal.
The other object is considered equal to this OptionalDouble if:
- it is also an OptionalDouble and;
- both instances have no value present or;
- the present values are “equal to” each other via ==.
Syntax:
public boolean equals(Object obj)
Parameters: This method accepts an obj which is an object to be tested for equality.
Return value: This method returns true if the other object is “equal to” this object otherwise false.
Below programs illustrate equals(Object obj) method:
Program 1:
import java.util.OptionalDouble;
public class GFG {
public static void main(String[] args)
{
OptionalDouble opDouble1
= OptionalDouble.of( 452.13246 );
System.out.println( "OptionalDouble 1: "
+ opDouble1.toString());
OptionalDouble opDouble2
= OptionalDouble.of( 452.13246 );
System.out.println( "OptionalDouble 2: "
+ opDouble2.toString());
System.out.println( "Are both objects equal: "
+ opDouble1.equals(opDouble2));
}
}
|
Output:
OptionalDouble 1: OptionalDouble[452.13246]
OptionalDouble 2: OptionalDouble[452.13246]
Are both objects equal: true
Program 2:
import java.util.OptionalDouble;
public class GFG {
public static void main(String[] args)
{
OptionalDouble opDouble1
= OptionalDouble.of( 3179464.92 );
System.out.println( "OptionalDouble 1: "
+ opDouble1.toString());
OptionalDouble opDouble2
= OptionalDouble.of( 4521.3246 );
System.out.println( "OptionalDouble 2: "
+ opDouble2.toString());
System.out.println( "Are both objects equal: "
+ opDouble1.equals(opDouble2));
}
}
|
Output:
OptionalDouble 1: OptionalDouble[3179464.92]
OptionalDouble 2: OptionalDouble[4521.3246]
Are both objects equal: false
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#equals?(Object obj)
Last Updated :
01 May, 2019
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