My source code below but unbel to run with TestNG and mvn

package test2;

import org.testng.annotations.Test;

public class testMvnClass1st {

public void beforeTest()
{
System.out.println("Before Test");
}

public void AfterTest()
{
System.out.println("Before Test");
}

public void beforeMethod()
{
System.out.println("Before Test");
}

public void afterMethod()
{
System.out.println("Before Test");
}

public void beforeClass()
{
System.out.println("Before Class");

}

public void afterClass()
{
System.out.println("After Class");
}

@Test(priority=1)
public void t1()
{
System.out.println("Hello");
}

@Test(priority=2)
public void t2()
{
System.out.println("Hello");
}

@Test(priority=3)
public void t3()
{
System.out.println("Hello");
}

@Test(priority=4)
public void t4()
{
System.out.println("Hello");
}
}