floatvalue 重写

Number类floatValue()方法 (Number Class floatValue() method)

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

  floatValue()方法在java.lang包中可用。

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

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

• floatValue() 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.

  floatValue()方法是一种非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

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

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

Syntax:

句法：

    public abstract float floatValue();

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

此方法的返回类型为float ，它返回由此Number对象表示的转换后的值(从Number类型转换为float类型)。

Example:

例：

// Java program to demonstrate the example 
// of floatValue() method of Number class
public class FloatValueOfNumberClass {
public static void main(String[] args) {
// Variables initialization
int i1 = 10;
double d1 = 20.62;
// It returns float value denoted by this object
// and converted to a float by calling i.floatValue()
Integer i = new Integer(i1);
// Display i result
System.out.println("i.floatValue(): " + i.floatValue());
// It returns float value denoted by this object
// and converted to a float by calling d.floatValue()
Double d = new Double(d1);
// Display d result
System.out.println("d.floatValue(): " + d.floatValue());
}
}

Output

输出量

i.floatValue(): 10.0
d.floatValue(): 20.62

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

floatvalue 重写