Java中的孤立島問題

After an object has been used, it is deallocated from the memory using the Garbage Collector class. The objects are destroyed based on the fact that no reference to that objects is present. Collector class calls the 'finalize' function on the object that needs to be destroyed.

What is island of isolation?

##When two objects 'a', and ' b' reference each other, and they are not referenced by any other object, it is known as island of isolation.

It is a group of objects which reference each other but they are not reference objects which reference each other but they are not reference butobothers of others not reference other applications at all.

Note − A single unreferenced object is also an island of isolation.

Let us see an example −

Example

Let us see an example −

# Live Demo

public class Demo{
   Demo i;
   public static void main(String[] args){
      Demo my_ob_1 = new Demo();
      System.out.println("Demo object one has been created");
      Demo my_ob_2 = new Demo();
      System.out.println("Demo object two has been created");
      my_ob_1.i = my_ob_2;
      my_ob_2.i = my_ob_1;
      my_ob_1 = null;
      my_ob_2 = null;
      System.gc();
   }
   @Override
   protected void finalize() throws Throwable{
      System.out.println("The finalize method has been called on the object");
   }
}

Output

Demo object one has been created
Demo object two has been created
The finalize method has been called on the object
The finalize method has been called on the object

一個名為Demo的類別包含了主函數。在這裡，創建了一個類型為Demo類別的變數。建立了Demo類別的一個實例，並將第二個物件指派給第一個物件的Demo物件。同樣的方式也適用於第二個物件。現在，這兩個物件都被指派為null，並呼叫了'System.gc'函數。現在，'finalize'函數被重寫。 ###

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