内部类

package class1;
interface AA{
public void printInfo() ;
}
class X {
public void fun1() {
this.fun2(new AA(){
public void printInfo() {
System.out.println("Helo world!!!");
}
});
}
public void fun2(AA a) {
a.printInfo() ;
}
}
public class NoInnerClassDemo02 {
public static void main(String args[]) {
new X().fun1();
}
}