isinfinite

双类isInfinite()方法 (Double class isInfinite() method)

• isInfinite() method is available in java.lang package.

  isInfinite()方法在java.lang包中可用。

• isInfinite() method is used to check infinity (i.e. either positive infinity or negative infinity).

  isInfinite()方法用于检查无穷大(即正无穷大或负无穷大)。

• isInfinite() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  isInfinite()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• isInfinite() method does not throw an exception at the time of checking infinity.

  isInfinite()方法在检查无穷大时不会引发异常。

Syntax:

句法：

    public boolean isInfinite();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is boolean, it returns "true" if this object is either positive or negative infinity, else it returns "false".

此方法的返回类型为boolean ，如果此对象是正无穷大或负无穷大，则返回“ true”，否则返回“ false”。

Example:

例：

// Java program to demonstrate the example
// of isInfinite() method of Double class
public class IsInfiniteOfDoubleClass {public static void main(String[] args) {// Object initialization
Double ob1 = new Double(10.0 / 0.0);
Double ob2 = new Double(-20.0 / 0.0);
Double ob3 = new Double(20.0);
// Display ob1,ob2 and ob3 values
System.out.println("ob1: " + ob1);
System.out.println("ob2: " + ob2);
System.out.println("ob3: " + ob3);
// It checks infinity by calling ob1.isInfinite() for ob1
// and ob2.isInfinite() for ob2 and ob2.isInfinite() for ob3
boolean infinite1 = ob1.isInfinite();
boolean infinite2 = ob2.isInfinite();
boolean infinite3 = ob3.isInfinite();
// Display result values
System.out.println("ob1.isInfinite(): " + infinite1);
System.out.println("ob2.isInfinite(): " + infinite2);
System.out.println("ob3.isInfinite(): " + infinite3);
}
}

Output

输出量

ob1: Infinity
ob2: -Infinity
ob3: 20.0
ob1.isInfinite(): true
ob2.isInfinite(): true
ob3.isInfinite(): false

翻译自: https://www.includehelp.com/java/double-class-isinfinite-method-with-example.aspx

isinfinite