内部类
public class Outer {
private int id =10;
public void out(){
System.out.println("这是外部类的方法");
}
public class Inner{
public void in() {
System.out.println("这是内部类的方法");
}
//获得外部类的私有属性
public void getID(){
System.out.println(id);
}
}
}
============================================
public class Application {
public static void main(String[] args) {
Outer outer = new Outer();
//通过外部类来实例化这个内部类
Outer.Inner inner = outer.new Inner();
inner.getID();
}
}
============================================
public class Outer {
//局部内部类
public void method(){
class Inner{};
}
}
=============================================
public class Test {
public static void main(String[] args) {
//没有名字初始化类,不用将实例保存在变量中
new Apple().eat();
//匿名内部类
new UserSvice(){