physicalconstants.java

effective-java中文英文版,大师人物写的

// Constant utility class
public class PhysicalConstants {
  private PhysicalConstants() { }  // Prevents instantiation

  public static final double AVOGADROS_NUMBER   = 6.02214199e23;
  public static final double BOLTZMANN_CONSTANT = 1.3806503e-23;
  public static final double ELECTRON_MASS      = 9.10938188e-31;
}