class person { Strig name; void introdece(){
System.out.println("name="+name); }
}
class Student extends person{
String address; //复写 void introdece() { super.introdece(); System.out.println("name="+name
+"address="+address);}
}
class Test{ public static void main(String args []) { Student s=new Student(); s.name="name"; s.address="a"; s.introdece(); Person p =new Person(); p.name="b"; p.introdece();
} }
javac *.java :编译当前文件夹的所有.java文件.