floatvalue 重寫

Number類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對象表示的值，該值轉換為float類型(通過強制轉換)，并且可能涉及舍入或截斷。

• 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()方法是一種非靜態方法，僅可通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

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

  從Number轉換為float時， floatValue()方法不會引發異常。

Syntax:

句法：

    public abstract float floatValue();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

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.

此方法的返回類型為float ，它返回由此Number對象表示的轉換后的值(從Number類型轉換為float類型)。

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

輸出量

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

翻譯自: https://www.includehelp.com/java/number-floatvalue-method-with-example.aspx

floatvalue 重寫