//外部类
class Out {private int age = 12;//内部类class In {public void print() {System.out.println(age);}}
}public class Demo {public static void main(String[] args) {Out.In in = new Out().new In();in.print();}
}

new 父类构造器（参数列表）|实现接口（）    {    //匿名内部类的类体部分    }

package lianxi;public class Lianxi {public static void main(String[] args) {/*====>这种构造方法可以实现父类中没有的方法实现调用* new Dongwu() {public void xiuxi() {System.out.println("看看这个地方");};public void xiuxi1() {System.out.println("看看这个那地方");};}.xiuxi1();*/Dongwu d = new Dongwu() {//这种方法只能对外类的方法进行重写  不然调用的时候会报错public void xiuxi() {System.out.println("看看这个地方");};};d.xiuxi();}
}abstract class Dongwu{public static int age = 10;public void chi() {System.out.println("吃肉");}abstract void xiuxi();
}class Dog extends Dongwu{public void xiuxi() {System.out.println("娱乐项目"+Dongwu.age);}public void wan() {System.out.println("娱乐玩项目"+Dongwu.age);}}

class Out {private static int age = 12;static class In {public void print() {System.out.println(age);}}
}public class Demo {public static void main(String[] args) {Out.In in = new Out.In();in.print();}
}

class Out {private int age = 12;public void Print(final int x) {class In {public void inPrint() {System.out.println(x);System.out.println(age);}}new In().inPrint();}
}public class Demo {public static void main(String[] args) {Out out = new Out();out.Print(3);}
}

new ActionListener(){private String innerStr;@Overridepublic void actionPerformed(ActionEvent arg0) {             jl.setText(innerStr);}public ActionListener accept(String str) {this.innerStr = str;return this;}}.accept(innerString)；