Double isInfinite() method in Java with examples

The java.lang.Double.isInfinite() method of Java Double class is a built in method in Java returns true if this Double value or the specified double value is infinitely large in magnitude, false otherwise.

Syntax:  

public boolean isInfinite()
        or
public static boolean isInfinite(double val)

Parameters: The function accepts a single parameter val which specifies the value to be checked when called directly with the Double class as static method. The parameter is not required when the method is used as instance method. 
Return Value: It return true if the val is infinite else it return false.
Below programs illustrate isInfinite() method in Java:
Program 1:

Java

// Java code to demonstrate
// Double isInfinite() method
// without parameter

class GFG {
    public static void main(String[] args)
    {

        // first example
        Double f1 = new Double(1.0 / 0.0);

        boolean res = f1.isInfinite();

        // printing the output
        if (res)
            System.out.println(f1 + " is infinity");
        else
            System.out.println(f1 + " is not infinity");

        // second example
        f1 = new Double(0.0 / 0.0);

        res = f1.isInfinite();

        // printing the output
        if (res)
            System.out.println(f1 + " is infinity");
        else
            System.out.println(f1 + " is not infinity");
    }
}

Output:

Infinity is infinity
NaN is not infinity

Program 2:

Java

// Java code to demonstrate
// Double isInfinite() method
// with parameter

class GFG {
    public static void main(String[] args)
    {

        // first example
        Double f1 = new Double(1.0 / 0.0);

        boolean res = f1.isInfinite(f1);

        // printing the output
        if (res)
            System.out.println(f1 + " is infinity");
        else
            System.out.println(f1 + " is not infinity");

        // second example
        f1 = new Double(0.0 / 0.0);

        res = f1.isInfinite(f1);

        // printing the output
        if (res)
            System.out.println(f1 + " is infinity");
        else
            System.out.println(f1 + " is not infinity");
    }
}

Output:

Infinity is infinity
NaN is not infinity

Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#isInfinite(double)