new类时，后面有{//do something}?

Question

public class Test126 
{
public static void main(String[] args) 
{
Test126 test=new Test126(){
       public void aa(){
      System.out.println("abcd");
   }
};//这边该怎么理解？  test.aa();
System.out.println("Hello World!");
}
public void aa(){
System.out.println("abc");

}
}

Answer 1

Test126 test=new Test126(){ 
      public void aa(){ 
      System.out.println("abcd"); 
  } 
}匿名类而已,查看下匿名类的概念就知道怎么回事了