Java ClassLoader setDefaultAssertionStatus() Method

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Description

The Java ClassLoader setdefaultassertionstatus() method sets the default assertion status for this class loader. This setting determines whether classes loaded by this class loader and initialized in the future will have assertions enabled or disabled by default.

Declaration

Following is the declaration for java.lang.ClassLoader.setDefaultAssertionStatus() method

public void setDefaultAssertionStatus(boolean enabled)

Parameters

enabled − Set it true if classes loaded by this class loader will henceforth have assertions enabled by default, false if they will have assertions disabled by default.

Return Value

This method does not return any value.

Exception

NA

Setting Default Assertion Status of a ClassLoader as True Example

The following example shows the usage of java.lang.ClassLoader.setdefaultassertionstatus() method. In this program, we've retrieved class of a ClassLoaderDemo. Then using getClassLoader(), we get the required ClassLoader and printed class loader class using getClass() and printed the parent class loader using getParent() method. Now using setdefaultassertionstatus() method, we've set default assertion status settings associated with the class loader as true.

package com.tutorialspoint;

public class ClassLoaderDemo {

   public static void main(String[] args) throws Exception {
     
      Class cls = Class.forName("com.tutorialspoint.ClassLoaderDemo");

      // returns the ClassLoader object associated with this Class
      ClassLoader cLoader = cls.getClassLoader();
    
      System.out.println(cLoader.getClass());
    
      // returns the parent ClassLoader
      System.out.println(cLoader.getParent());
  
      // sets the default assertion status for this class loader
      cLoader.setDefaultAssertionStatus(true); 
   }
} 

Output

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

class jdk.internal.loader.ClassLoaders$AppClassLoader
jdk.internal.loader.ClassLoaders$PlatformClassLoader@4517d9a3

Setting Default Assertion Status of a ClassLoader as False Example

The following example shows the usage of java.lang.ClassLoader.setdefaultassertionstatus() method. In this program, we've retrieved class of a ClassLoaderDemo. Then using getClassLoader(), we get the required ClassLoader and printed class loader class using getClass() and printed the parent class loader using getParent() method. Now using setdefaultassertionstatus() method, we've set default assertion status settings associated with the class loader as false.

package com.tutorialspoint;

public class ClassLoaderDemo {

   public static void main(String[] args) throws Exception {
     
      Class cls = Class.forName("com.tutorialspoint.ClassLoaderDemo");

      // returns the ClassLoader object associated with this Class
      ClassLoader cLoader = cls.getClassLoader();
    
      System.out.println(cLoader.getClass());
    
      // returns the parent ClassLoader
      System.out.println(cLoader.getParent());
  
      // sets the default assertion status for this class loader
      cLoader.setDefaultAssertionStatus(false); 
   }
} 

Output

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

class jdk.internal.loader.ClassLoaders$AppClassLoader
jdk.internal.loader.ClassLoaders$PlatformClassLoader@4517d9a3