java抽象类与继承用法

[java]代码库

abstract class Employee
{
    String name;
    float basic;
    String address;

    Employee()
    {

    }

    Employee(String str,float sal,String addr)
    {
        name=str;
        basic=sal;
        address=addr;
    }
    
    void show()
    {
        System.out.println(name + " " + basic + " " + address);
    }



}

class Manager extends Employee
{
    String department;

    Manager()
    {

    {

    Manager(String str,float sal,String addr,String dept) 
    {
        super(str,sal,addr);
        department=dept;
    }

    void show()
    {
        super.show();
        System.out.println(department);
    }

}



class Director extends Employee
{
    String transportAllowance;

    Director()
    {

    {

    Director(String str,float sal,String addr,String tA) 
    {
        super(str,sal,addr);
        transportAllowance=tA;
    }

    void show()
    {
        super.show();
        System.out.println(transportAllowance);
    }

}


public class Test
{
    Test
    {

    }

    public static void main(String [] args)
    {
        Manager objM=new Manager("aa",4000,"tt","manager");
        System.out.println("m");
        objM.show();    
        
        Director objD=new Director("bb",6000,"vv","director");
        System.out.println("d");
        objD.show();    
    }
}