这个 JAVA数学大整数。浮动值() 将此BigInteger转换为浮点值。如果此函数返回的值太大,无法用浮点表示大小,则会将其转换为浮点。负无穷大或浮点数。适当的正无穷大。这种转换可能会丢失有关BigInteger值精度的信息。
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语法:
public float floatValue()
返回: 该方法返回一个浮点值,该值表示此BigInteger的浮点值。
例如:
Input: BigInteger1=32145 Output: 32145.0 Explanation: BigInteger1.floatValue()=32145.0. Input: BigInteger1=32145535361361525377 Output: 3.2145535E19 Explanation: BigInteger1.floatValue()=3.2145535E19. This BigInteger is too big for a magnitude to represent as a float then it will be converted to Float.NEGATIVE_INFINITY or Float.POSITIVE_INFINITY as appropriate.
下面的程序演示了BigInteger类的floatValue()方法:
例1:
// Java program to demonstrate floatValue() method of BigInteger import java.math.BigInteger; public class GFG { public static void main(String[] args) { // Creating 2 BigInteger objects BigInteger b1, b2; b1 = new BigInteger( "32145" ); b2 = new BigInteger( "7613721" ); // apply floatValue() method float floatValueOfb1 = b1.floatValue(); float floatValueOfb2 = b2.floatValue(); // print floatValue System.out.println( "floatValue of " + b1 + " : " + floatValueOfb1); System.out.println( "floatValue of " + b2 + " : " + floatValueOfb2); } } |
输出:
floatValue of 32145 : 32145.0 floatValue of 7613721 : 7613721.0
示例2:返回浮点太大,无法用浮点表示幅值。
// Java program to demonstrate floatValue() method of BigInteger import java.math.BigInteger; public class GFG { public static void main(String[] args) { // Creating 2 BigInteger objects BigInteger b1, b2; b1 = new BigInteger( "32145535361361525377" ); b2 = new BigInteger( "7613721535372632367351" ); // apply floatValue() method float floatValueOfb1 = b1.floatValue(); float floatValueOfb2 = b2.floatValue(); // print floatValue System.out.println( "floatValue of " + b1 + " : " + floatValueOfb1); System.out.println( "floatValue of " + b2 + " : " + floatValueOfb2); } } |
输出:
floatValue of 32145535361361525377 : 3.2145535E19 floatValue of 7613721535372632367351 : 7.6137214E21
参考: https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#floatValue()
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