TestNG @AfterClass Annotation

@AfterClass: The @AfterClass annotated method will be executed after all the test methods of a current class have been invoked.

Let's understand the @AfterClass annotation through an example.

Step 1: Open the Eclipse.

Step 2: We create a simple java project.

Class1.java

package com.javatpoint;
import org.testng.annotations.AfterClass;
import org.testng.annotations.Test;

public class Class1 
{
 @AfterClass
 public void after_class()
 {
	 System.out.println("The above are the programming languages");
 }
 @Test
 public void testcase1()
 {
	 System.out.println("C");
 }
 @Test
 public void testcase2()
 {
	 System.out.println("C++");
 }
 @Test
 public void testcase3()
 {
	 System.out.println("Java");
 }

}

Class2.java

package com.javatpoint;
import org.testng.annotations.AfterClass;
import org.testng.annotations.Test;
public class Class2 
{
 @AfterClass
 public void after_class()
 {
	 System.out.println("The above are the automation testing tools");
 }
 @Test
 public void testcase1()
 {
	 System.out.println("Selenium");
 }
 @Test
 public void testcase2()
 {
	 System.out.println("Rational Functional Tester");
 }
 @Test
 public void testcase3()
 {
	 System.out.println("Cucumber");
 }
 @Test
 public void testcase4()
 {
	 System.out.println("eggPlant");
 }
}

We define @AfterClass annotated method in the above classes. We define after_class() method in Class1 which runs after all the test methods of Class1 have been executed, and we also define @BeforeClass annotated method, i.e, after_class() in Class2 as well which runs after all the test methods of Class2 have been executed.

Step 3: Now, we create testng.xml file to configure the above two classes.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="test_suite">
<test name="Before Class">
<classes>
<class name="com.javatpoint.Class1"/>
<class name="com.javatpoint.Class2"/>
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->

Step 4: Run the testng.xml file. Right click on the testng.xml file, move the cursor down to Run As and then click on the 1 TestNG Suite.