Parallel execution/Multiple thread

public class Runable {
 
 @BeforeClass(groups={"A","B"})
 public void Before1()
 {
  System.out.println("before");
 }
 @Test(groups={"B"})
 public void Test1()
 {
  System.out.println("Test1");
  System.out.println("thread name for test1"+Thread.currentThread().getId()+"class name:-"+getClass().getSimpleName());
 }
 @Test(groups={"A","B"})
 public void Test2()
 {
  System.out.println("Test2");
  System.out.println("thread name for test2"+Thread.currentThread().getId()+"class name:-"+getClass().getSimpleName());
 }
 @Test(groups={"A","B"})
 public void Test3()
 {
  System.out.println("Test3");
  System.out.println("thread name for test3"+Thread.currentThread().getId()+"class name:-"+getClass().getSimpleName());
 }
 @Test(groups={"A","B"})
 public void Test4()
 {
  System.out.println("Test4");
  System.out.println("thread name for test3"+Thread.currentThread().getId()+"class name:-"+getClass().getSimpleName());
 }
 @AfterClass(groups={"A"})
 public void After()
 {
  System.out.println("After");
  
 }










 

Xml file-

       

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
 <suite name="new suite" parallel="methods" thread-count="3">
 <test name="new test">
  <groups>
   <run>
    <include name="B" />
   </run>
  </groups>
  <classes>
   <class name="org.newpack.Runable" />
  </classes>
 </test>
</suite>



 

Output-