Java【小考】

2019-11-14 15:11:06

字體：大中小

來源：轉載

供稿：網友

課上，老師出了一個題:

考察：1、類的定義 2、類的屬性 3、類的方法、重載、構造方法、代碼塊

題目是這樣的：

設計一個類：Tree

要求：

1、包含main方法

2、屬性：靜態： String name ; double height; double growgrate

3、構造方法： a.從“種子開始長”。b。直接”移植“

4、其他方法 void grow(time)

{ height = , Sysem.out,PRintln(......);｝

我是這樣做的：

 package classworks; public class Tree {             static String name;             static  double height ;             static double growgrate =1.1;                 double time; static      {    height = 0;    name = "種子";    System.out.println( "名字：" + name +  "，   高度  " +height + "  " ) ;               }        void  grow(double time)       {        name = "松樹";        height =  time * 1.1 + growgrate;           System.out.println( "名字：" + name +  "，   高度  " +height + " " ) ;         }  } class Info{          double height;     String name;        public  Info(double height){     name = "小樹";     this.height = height;      }   public Info(String name,double height )       {             this.name = name;            this.height = height;        }       public void showInfo(){       System.out.println(" 名字： "+name+"  ，高度：   "+height+"   ");   } }   class main{         public static void main(String[] args){     Tree p = new Tree();      p.grow(12);       Info q1 = new Info(12);       q1.showInfo();       Info q2 = new Info("大樹",22);       q2.showInfo();    } }

之后又修改了下：

 package classworks; import static classworks.Info.height;import static classworks.Tree.height;public class Tree {             static String name;             static  double height ;             static double growgrate =1.1;                 double time; //其它方法   void  grow(double time)       {        name = "松樹";        height =  time * 1.1 + growgrate;           System.out.println( "名字：" + name +  "，   高度  " +height + " " ) ;         }  }//構造方法class seed{      static double height;      static String name;   public  seed(){    height = 0;    name = "種子";    System.out.println( "名字：" + name +  "，   高度  " +height + "  " ) ;               }} class Info{          static  double height;     static String name;        public  Info(double height){     name = "小樹";     this.height = height;      }          public Info(String name,double height )       {             this.name = name;            this.height = height;        }       public void showInfo(){       System.out.println(" 名字： "+name+"  ，高度：   "+height+"   ");   } }   class main{         public static void main(String[] args){        Tree p = new Tree();         p.grow(12);       new seed();         Info q1 = new Info(12);        q1.showInfo();        Info q2 = new Info("大樹",22);        q2.showInfo();    } }