Download Special Edition Using Java 1.1 by Joe Weber PDF

By Joe Weber

It's very thorough. nearly every thing vital approximately java is in there together with JDBC, JNI, Java Beans, Servlets, safety administration, even the specification of the digital computing device and so much is defined good understandble. it's the most sensible java e-book I ever observed!

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Even though you can use the pow method to raise any number to any power, the Math class provides the exp method as a shortcut for raising e to a power: public static double exp(double a) The log and exp functions are inverses of each other, they cancel each other out. In other words, log(exp(x)) == x, for any x. Also, exp(log(x)) == x, for any x > 0 (remember, you cannot take a log of a number <= 0). TIP: A base-10 logarithm is another common type of logarithm. Where the log of a number is the power you would raise e to, a base-10 logarithm is the power you raise 10 to.

For example: java -DMyProperty="Hi There" PrintProperty This command causes the application to print out MyProperty is set to: Hi There If you run the program without setting MyProperty, it prints: MyProperty is set to: My Default Value The getProperties and setProperties let you query and set the system properties using a Properties class: public static Properties getProperties() public static void setProperties(Properties prop) See "The Properties Class," Chapter 33 Forcing Garbage Collection The garbage collector normally just runs in the background, occasionally collecting unused memory.

The following methods in the Process class return input and output streams for you to send data to, and receive data from, the external program: public abstract InputStream getInputStream() public abstract InputStream getErrorStream() public abstract OutputStream getOutputStream() The getInputStream method returns a stream that is hooked to the output of the external program. out stream. Similarly, the getErrorStream returns a stream that is hooked to the error output of the external program, or what would be the System.

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