Two Java features

Example 1:

Import java. lang .*;
Public class Test {

Public static void main (String [] str)
{
Fun (new MyInterface () {public void Say ()
{
System. out. println ("this is temp interface ");
}});
Fun (new People () {public void Say ()
{
System. out. println ("this is temp class ");
}});
}

Static void Fun (MyInterface p)
{
P. Say ();
}
}

Interface MyInterface
{
Public void Say ();
}

Class People implements MyInterface
{
Public void Say ()
{

System. out. println ("this is People ");
}
}

Program output:

This is temp interface
This is temp class

 

 

 

 

Example 2:

Import java. lang .*;
Public class Test {

Public static void main (String [] str)
{
New Test (). TestFun ();
}

Static void Fun (MyInterface p)
{

P. Say ();
}

Void Why ()
{
System. out. println ("Why ");

}

Void TestFun ()
{
Fun (new MyInterface () {public void Say ()
{
Test. this. Why ();
Why ();

// If this sentence is added, it will enter an endless loop this. Say ();
// In summary, this represents a MyInterface type in this method, and the Test method can be used directly.
}});
}
}

Interface MyInterface
{
Public void Say ();
}

Program output: Why
Why

 

Example 3

Public class Test {
Static int Age = 123;
Public static void main (String [] str ){

 

System. out. println (myInterface. getClass ());

Fun (myInterface );
Age + = 1;
Fun (myInterface );
}

Static void Fun (MyInterface p ){
P. Say ();
}

Static MyInterface myInterface = new MyInterface (){
@ Override
Public void Say (){
System. out. println (Age );
}
};
}

 

 

Interface MyInterface
{
Public void Say ();
}

 

 

Program output:

 

Class Test $1

 

123

124

 

 

Example 4:

 

Public class Test {
Public static void main (String [] str ){

B. Test ();
}

Public void Run (){
System. out. println ("Test. Run ");

}
}

Class B {
Public static void Test (){
Test t = new Test (){
Public void Run (){
System. out. println (this. getClass ());
}
};
T. Run ();
Test t2 = new Test ();
System. out. println (t2.getClass ());
}
}

Program output: class B $1
Class Test

 

 

Fifth example:

Class Test {
Public static void main (String [] args)
{
A a = new (){
@ Override
Void Eat (){
Super. Eat ();
This. Say ();
System. out. println ("a. eat ");
}
};
A. Eat ();
System. out. println (a instanceof ));
System. out. println (a. getClass ()));

}
}

Class {
Void Say (){
System. out. println ("A. Say ");
}

Void Eat (){
System. out. println ("A. Eat ");
}
}

 

Program output:

A. Eat
A. Say
A. eat
True
Class Test $1