1.1999.999 has a type of "double",
use
public float DM = 1999.999F;2.实例s访问FatherClass中的DM:
use upcasting:
System.out.println("Father's DM: "+((FatherClass)s).DM);
use
public float DM = 1999.999F;2.实例s访问FatherClass中的DM:
use upcasting:
System.out.println("Father's DM: "+((FatherClass)s).DM);
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