Tutorial Addendum On Java - Beheading Ambiance

The program seems to be confusing:

    

    
• Why do I charge two altered methods to retrieve the anamnesis information?
  
      



    
• Why are the methods alleged again 5 times?
  
      



    
• Why are the press statements for the getMemoryInfo() adjustment not following
  
      

  the adjustment alarm statements immediately?
  
      



    

Answers to these questions are in the achievement of the program:

    

 

    
Print anamnesis advice - move = 0

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    
Print anamnesis advice - move = 1

    
 Chargeless anamnesis = 1774712

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 256904

    
Print anamnesis advice - move = 2

    
 Chargeless anamnesis = 1772496

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 259120

    
Print anamnesis advice - move = 3

    
 Chargeless anamnesis = 1770280

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 261336

    
Print anamnesis advice - move = 4

    
 Chargeless anamnesis = 1768064

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 263552

    
Get anamnesis advice - move = 0

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    
Get anamnesis advice - move = 1

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    
Get anamnesis advice - move = 2

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    
Get anamnesis advice - move = 3

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    
Get anamnesis advice - move = 4

    
 Chargeless anamnesis = 1777568

    
 Absolute anamnesis = 2031616

    
 Best anamnesis = 134217728

    
 Anamnesis acclimated = 254048

    

    
• The aberration amid the getMemoryInfo() adjustment and printMemoryInfo() adjustment is
  
      

  that the getMemoryInfo() adjustment saves the anamnesis acceptance into arrays, while
  
      

  printMemoryInfo() adjustment prints the anamnesis acceptance ethics on the console. This is to show
  
      

  the appulse of the press statements, System.out.println(), on the anamnesis usage.
  
      



    
• Calling the methods again is to see if there are any cilia additional than
  
      

  the appliance program cilia active that ability affect the anamnesis usage. As you
  
      

  can see from the output, the anamnesis acceptance was un-changed during the 5 calls to
  
      

  getMomeryInfo(). However, afterwards anniversary alarm to printMemoryInfo(), the chargeless anamnesis decreased
  
      

  by added than 2000 bytes. This suggests that the System.out.println() adjustment was leaving
  
      

  dead altar in anamnesis for the debris beneficiary to abolish them.
  
      



    
• Calling the getMemoryInfo() at the alpha and putting the accompanying printing
  
      

  statements at the end is to abstain any appulse of press statements on the printMemoryInfo()
  
      

  calls.
  
      



    

Calculating Anamnesis Acceptance of an Array

    

The anamnesis infomation provided by the JVM can be acclimated to account the anamnesis usage

    

of data altar acclimated in the appliance program. In the afterward program, I approved

    

to account the anamnesis acceptance of an array:

    

 

    
/**

    
 * MemoryUsage.java

    
 * Absorb (c) 2002 by Dr. Yang

    
 */

    
public chic MemoryUsage {

    
 clandestine changeless long fm = new long;	

    
 clandestine changeless long tm = new long;	

    
 clandestine changeless long mm = new long;	

    
 clandestine changeless long um = new long;	

    
 accessible changeless abandoned main(String a) {

    
 Runtime rt = Runtime.getRuntime();

    
 getMemoryInfo(rt,0);

    
 long la = null;

    
 continued s = allocateLongArray(la);

    
 getMemoryInfo(rt,1);

    
 System.out.println("Memory acceptance afore arrangement allocation:");

    
 System.out.println(" Chargeless anamnesis = "+fm);

    
 System.out.println(" Absolute anamnesis = "+tm);

    
 System.out.println(" Best anamnesis = "+mm);

    
 System.out.println(" Anamnesis acclimated = "+um);

    
 System.out.println("Memory acceptance afterwards arrangement allocation:");

    
 System.out.println(" Chargeless anamnesis = "+fm);

    
 System.out.println(" Absolute anamnesis = "+tm);

    
 System.out.println(" Best anamnesis = "+mm);

    
 System.out.println(" Anamnesis acclimated = "+um);

    
 System.out.println("Memory acceptance summary:");

    
 System.out.println(" Allocated to the arrangement = "+s);

    
 System.out.println(" Anamnesis acceptance access = "+(um-um));

    
 System.out.println(" Aerial of individual arrangement = "

    
  +(um-um-s));

    
 }

    
 accessible changeless abandoned getMemoryInfo(Runtime rt, int i) {

    
 fm = rt.freeMemory();

    
 tm = rt.totalMemory();

    
 mm = rt.maxMemory();

    
 um = tm-fm;

    
 }

    
 

    
 accessible changeless continued getMemoryInfo(Runtime rt) {

    
 //rt.gc();

    
 System.out.println("Getting JVM anamnesis infomation...");

    
 continued fm = rt.freeMemory();

    
 continued tm = rt.totalMemory();

    
 continued mm = rt.maxMemory();

    
 System.out.println(" Chargeless anamnesis = "+fm);

    
 System.out.println(" Absolute anamnesis = "+tm);

    
 System.out.println(" Best anamnesis = "+mm);

    
 System.out.println(" Anamnesis acclimated = "+(tm-fm));

    
 acknowledgment tm-fm;

    
 }

    
 accessible changeless continued allocateLongArray(long la) {

    
 int s = 2*128*1024;

    
 la = new long; // 2 MB bare for this array

    
 acknowledgment 8*s;

    
 }

    
}