import java.util.*; /** The first Thinking in Java example program. * Lists system information on current machine. * @author Bruce Eckel * @author http://www.BruceEckel.com * @version 1.0 */ public class Property { /** * Sole entry point to class & application * * @param args * array of string arguments * @return No return value * @exception exceptions * No exceptions thrown */ public static void main(String[] args) { System.out.println(new Date()); Properties p = System.getProperties(); p.list(System.out); System.out.println("--- Memory Usage:"); Runtime rt = Runtime.getRuntime(); System.out.println("Total Memory = " + rt.totalMemory() + " Free Memory = " + rt.freeMemory()); }} // /:~ 你有什么不懂的可以说,我最近也在看这本书,这是修改过的
/** The first Thinking in Java example program.
* Lists system information on current machine.
* @author Bruce Eckel
* @author http://www.BruceEckel.com
* @version 1.0
*/
public class Property {
/**
* Sole entry point to class & application
*
* @param args
* array of string arguments
* @return No return value
* @exception exceptions
* No exceptions thrown
*/
public static void main(String[] args) {
System.out.println(new Date());
Properties p = System.getProperties();
p.list(System.out);
System.out.println("--- Memory Usage:");
Runtime rt = Runtime.getRuntime();
System.out.println("Total Memory = " + rt.totalMemory()
+ " Free Memory = " + rt.freeMemory());
}} // /:~
你有什么不懂的可以说,我最近也在看这本书,这是修改过的