打印出与当前运行的系统有关的资料

public static void main(String[] args) {

System.out.print(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());

 

}