public class Test2
{
public static void main(String[] args)
{
Float a = new Float(3.4);
System.out.println(a.SIZE);
a = new Float(34000);
System.out.println(a.SIZE);
}
}
我們先來(lái)看看JDK的解釋吧.
public static final int SIZE
The number of bits used to represent a float value.
意思是說(shuō):通常去描述一個(gè)float值的位數(shù).
這個(gè)是一個(gè)常量,來(lái)看看源碼吧:
public static final int SIZE = 32;
final int 變量一旦被定義就不能被改變~