继承中的构造方法和thissuper关键字

继承中：构造方法的访问特点

• 代码实现

• 为成员进行赋值

• 总结

this、super使用总结

• this

• super

• 关键字

  • 用this访问构造

  • 使用场景

    要给数据做默认值时使用

练习

1. 员工类

   package yuangong;
   public class yuangong {
       private String id;
       private String name;
       private int gz;
   
       public yuangong() {
       }
   
       public yuangong(String id, String name, int gz) {
           this.id = id;
           this.name = name;
           this.gz = gz;
       }
   
       public String getId() {
           return id;
       }
   
       public void setId(String id) {
           this.id = id;
       }
   
       public String getName() {
           return name;
       }
   
       public void setName(String name) {
           this.name = name;
       }
   
       public int getGz() {
           return gz;
       }
   
       public void setGz(int gz) {
           this.gz = gz;
       }
       public void eat(){
           System.out.println("员工在吃饭");
       }
       public void word(){
           System.out.println("员工在工作");
       }
   }
   
   

2. 厨师类

   package yuangong;
   public class chushi extends yuangong{
       public chushi() {
       }
   
       public chushi(String id, String name, int gz) {
           super(id, name, gz);
       }
   @Override
       public void word(){
           System.out.println(getName()+"在炒菜");
       }
   }
   
   

3. 经理类

   package yuangong;
   
   public class jingli extends yuangong{
       private int guanli;
   
       public jingli() {
       }
   
       public jingli(int guanli) {
           this.guanli = guanli;
       }
   
       public jingli(String id, String name, int gz, int guanli) {
           super(id, name, gz);
           this.guanli = guanli;
       }
   
       public int getGuanli() {
           return guanli;
       }
   
       public void setGuanli(int guanli) {
           this.guanli = guanli;
       }
   
       @Override
       public void word() {
           System.out.println(getName()+"在管理其他人");
       }
   }
   
   

4. 测试

   package yuangong;
   public class test {
       public static void main(String[] args) {
           //创建厨师对象并赋值
           chushi c = new chushi("heima001","蔡徐坤",1000);
           //使用类中的方法
          c.word();
          c.eat();
           System.out.println(c.getName()+","+c.getId()+","+c.getGz());
           //创建经理对象
          jingli j = new jingli();
          //赋值
           //工资
         j.setGz(10000);
         //奖金
         j.setGuanli(20);
         //id
         j.setId("heima002");
         //姓名
         j.setName("吴亦凡");
           //使用类中的方法
         j.word();
         j.eat();
           System.out.println(j.getName()+","+j.getId()+","+ j.getGz()+","+j.getGuanli());
       }
   }
   

练习2