sample 1:
well as mentioned above, you can try them. By the way after getting connected you can use following codes:(if you wish)
import java.util.Properties;
public class GetCompleteSystemInfo {
public static void main(String args[]) {
//1.Get Java Runtime
Runtime runtime = Runtime.getRuntime();
System.out.println("Runtime=" + Runtime.getRuntime());
//2. Get Number of Processor availaible to JVM
int numberOfProcessors = runtime.availableProcessors();
System.out.println(numberOfProcessors + " Processors ");
//2. Get FreeMemory, Max Memory and Total Memory
long freeMemory = runtime.freeMemory();
System.out.println("Bytes=" + freeMemory + " |KB=" + freeMemory / 1024 + " |MB=" + (freeMemory / 1024) / 1024+" Free Memory in JVM");
long maxMemory = runtime.maxMemory();
System.out.println(maxMemory + "-Bytes " + maxMemory / 1024 + "-KB " + (maxMemory / 1024) / 1024 + "-MB " + " Max Memory Availaible in JVM");
long totalMemory = runtime.totalMemory();
System.out.println(totalMemory + "-Bytes " + totalMemory / 1024 + "-KB " + (totalMemory / 1024) / 1024 + "-MB " + " Total Memory Availaible in JVM");
//3. Suggest JVM to Run Garbage Collector
runtime.gc();
//4. Suggest JVM to Run Discarded Object Finalization
runtime.runFinalization();
//5. Terminate JVM
//System.out.println("About to halt the current jvm");//not to be run always
//runtime.halt(1);
// System.out.println("JVM Terminated");
//6. Get OS Name
String strOSName = System.getProperty("os.name");
if (strOSName != null) {
if (strOSName.toLowerCase().indexOf("windows") != -1) {
System.out.println("This is "+strOSName);
} else {
System.out.print("Can't Determine");
}
}
//7. Get JVM Spec
String strJavaVersion = System.getProperty("java.specification.version");
System.out.println("JVM Spec : " + strJavaVersion);
//8. Get Class Path
String strClassPath = System.getProperty("java.class.path");
System.out.println("Classpath: " + strClassPath);
//9. Get File Separator
String strFileSeparator = System.getProperty("file.separator");
System.out.println("File separator: " + strFileSeparator);
//10. Get System Properties
Properties prop = System.getProperties();
System.out.println("System Properties(detail): " + prop);
//11. Get System Time
long lnSystemTime = System.currentTimeMillis();
System.out.println("Milliseconds since midnight, January 1, 1970 UTC : " + lnSystemTime + "\nSecond=" + lnSystemTime / 1000 + "\nMinutes=" + (lnSystemTime / 1000) / 60 + ""
+ "\nHours=" + ((lnSystemTime / 1000) / 60) / 60 + "\nDays=" + (((lnSystemTime / 1000) / 60) / 60) / 24 + "\nYears=" + ((((lnSystemTime / 1000) / 60) / 60) / 24) / 365);
}
}sample 2:
You can get some limited memory information from the Runtime class. It really isn’t exactly what you are looking for, but I thought I would provide it for the sake of completeness. Here is a small example. Edit: You can also get disk usage information from the java.io.File class. The disk space usage stuff requires Java 1.6 or higher.
public class Main {
public static void main(String[] args) {
/* Total number of processors or cores available to the JVM */
System.out.println("Available processors (cores): " +
Runtime.getRuntime().availableProcessors());
/* Total amount of free memory available to the JVM */
System.out.println("Free memory (bytes): " +
Runtime.getRuntime().freeMemory());
/* This will return Long.MAX_VALUE if there is no preset limit */
long maxMemory = Runtime.getRuntime().maxMemory();
/* Maximum amount of memory the JVM will attempt to use */
System.out.println("Maximum memory (bytes): " +
(maxMemory == Long.MAX_VALUE ? "no limit" : maxMemory));
/* Total memory currently available to the JVM */
System.out.println("Total memory available to JVM (bytes): " +
Runtime.getRuntime().totalMemory());
/* Get a list of all filesystem roots on this system */
File[] roots = File.listRoots();
/* For each filesystem root, print some info */
for (File root : roots) {
System.out.println("File system root: " + root.getAbsolutePath());
System.out.println("Total space (bytes): " + root.getTotalSpace());
System.out.println("Free space (bytes): " + root.getFreeSpace());
System.out.println("Usable space (bytes): " + root.getUsableSpace());
}
}
}