The output format of the class-wise statistical information output by the instance statistical functionality is as follows:

Output format

Java Heap Profile
-----------------------
________________Size__Instances__Class________________
 <total_size> <Instance_count> <class_name>
 <total_size> <Instance_count> <class_name>
...

Output items

The items listed in the output format are described as follows.

Table 9-6 Output items (instance statistical functionality)

The output example of the class-wise statistical information output by the instance statistical functionality is described as the example of the following source.

public class instance {
 public static void main(String args[]) {
 classA cls_a = new classA();
 try {
 Thread.sleep(20000);
 } catch (Exception e) {}
 }
}
class classA {
 classB a1;
 classC a2;
 classA() {
 a1 = new classB();
 a2 = new classC();
 }
}
class classB {
 classD b1;
 String b2;
 classB() {
 b1 = new classD();
 b2 = null;
 }
}
class classC {
 String c1, c2;
 classC() {
 c1 = null;
 c2 = null;
 }
}
class classD {
 String d1, d2;
 classD() {
 d1 = null;
 d2 = null;
 }
}

The following figure shows the instance structure for above source.

Figure 9-2 Instance structure (instance statistical functionality)

When using the above instance structure, add the following size for each class in the instance statistical functionality:

• Size of class A: a1+a2+ b1+b2+ c1+c2+ d1+d2
• Size of class B: b1+b2+ d1+d2
• Size of class C: c1+c2
• Size of class D: d1+d2

The following figure shows the output result of the instance statistical functionality.

Figure 9-3 Output result (instance statistical functionality)