longvalue

Number类longValue()方法 (Number Class longValue() method)

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

  longValue()方法在java.lang包中可用。

• longValue() method is used to return the value denoted by this Number object converted to type long (by casting ) and it may involve in rounding or truncations.

  longValue()方法用于返回此Number对象表示的值，该值转换为long类型(通过强制转换)，并且可能涉及舍入或截断。

• longValue() 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.

  longValue()方法是一个非静态方法，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。

• longValue() method does not throw an exception at the time of conversion from Number to long.

  从Number转换为long时， longValue()方法不会引发异常。

Syntax:

句法：

    public abstract long longValue();

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 long, it returns a converted (from type number to long) value represented by this Number object.

此方法的返回类型为long ，它返回由此Number对象表示的转换后的值(从类型编号到long)。

Example:

例：

// Java program to demonstrate the example
// of longValue() method of Number class
public class LongValueOfNumberClass {public static void main(String[] args) {// Variables initialization
float f1 = 10.58f;
double d1 = 20.62;
// It returns long value denoted by this object
// and converted to a long by calling f.longValue()
Float f = new Float(f1);
// Display f result
System.out.println("f.longValue(): " + f.longValue());
// It returns long value denoted by this object
// and converted to a long by calling d.longValue()
Double d = new Double(d1);
// Display d result
System.out.println("d.longValue(): " + d.longValue());
}
}

Output

输出量

f.longValue(): 10
d.longValue(): 20

翻译自: https://www.includehelp.com/java/number-longvalue-method-with-example.aspx

longvalue