systemoutput.java

Java程序设计技巧与开发实例附书源代码。

public class SystemOutput
{  public static void main(String args[])
   {  short aShort = 1;
      int anInt = 123;
      long aLong = 123456L;
      float aFloat = 123F;
      double pi = Math.PI,e = Math.E;
      char cc = 'B';
      boolean okay = false;
      System.out.println("Decimal numbers:");
      System.out.println("\t double value: " + pi + " (pi)");
      System.out.println("\t double value: " + e + " (Euler's number)");
      System.out.println("\t float value:  " + aFloat);
      System.out.println("\t large double value: " + Math.exp(120.0));
      System.out.println("Integer numbers:");
      System.out.print("\t int is " + anInt);
      System.out.print("， short is " + aShort);
      System.out.println("， and a long is " + aLong);
      System.out.println("Other types:");
      System.out.println("\t character = " + cc + "， boolean = " + okay);
      System.out.println("Computations:");
      System.out.println("\t square root of 2 = " + Math.sqrt(2.0));
      System.out.println("\t cos(e + Pi) = " + Math.cos(e + pi));
      System.out.flush();
   }
}