class A{
void f() {
System.out.println("I am A");
}
}
class B{
}
public class Hello{
public static void main(String arg[]){
System.out.println("你好，很高兴学习Java");
A a=new A();
a.f();
}
}
public class Tom{
int leg;
String head;
void cry(String s){
System.out.println(s);
}
}
class Example{
public static void main(String arg[]){
Tom cat;
cat=new Tom();
cat.leg=4;
cat.head="maotou";
System.out.println("tui:"+cat.leg+"tiao");
System.out.println("tou:"+cat.head);
cat.cry("fight with Jerry today");
}
}
