Java System runFinalization() Method

Description

The Java System runFinalization() method runs the finalization methods of any objects pending finalization.

Declaration

Following is the declaration for java.lang.System.runFinalization() method

public static void runFinalization()

Parameters

NA

Return Value

This method does not return any value.

Exception

NA

Example: Running finalization

The following example shows the usage of Java System runFinalization() method. In this program, we've created a File Object and printed it identity hash code. Then we've printed the system time in milliseconds. Finally using runFinalization() method, finalization call is run for any objects pending finalization.

package com.tutorialspoint;

public class SystemDemo {

   public static void main(String[] args) throws Exception {

      File file1 = new File("abcd");
   
      // returns the HashCode
      int ret = System.identityHashCode(file1);
      System.out.println(ret);
   
      // returns the current value of the system timer, in milliseconds
      System.out.print("time in milliseconds = ");
      System.out.println(System.currentTimeMillis());
   
      System.out.println("finalization of any objects pending finalization!");
      System.runFinalization();
      System.out.println("Done!!!");    
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

355165777
time in milliseconds = 1350971291853
finalization of any objects pending finalization!
Done!!!