Syntactic structure of anonymous inner classes
Anonymous inner classes are mainly for abstract classes and interfaces that cannot directly create objects
new 类名或接口名(){
重写方法;
};
Examples
public interface Body extends Mammal
{
class Heart
{
public void work()
{
System.out.println("is beating");
}
}
class A{
}
Object o = new Object() {
};
Object object = new Object() {
};
static Mammal mammal = new Mammal() {
public void move() {
System.out.println("moving by fins");
}
};
public static void main(String[] args) {
mammal.move();
new Mammal() {
public void move() {
System.out.println("moving by fins");
}
}.move();
new Mammal() {
public void move() {
System.out.println("moving by fins");
}
public void eat() {
System.out.println("eating by mouth");
}
}.eat();
}
}
The anonymous class expression contains the following internal parts:
- Operator
- An interface to be implemented or a class to be inherited
- A pair of brackets
- A paragraph is enclosed in "{}" class declaration body
- ";" At the end
