java 编程思想课后题（第三章）

最新推荐文章于 2020-11-27 20:42:19 发布

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本文提供了几个Java编程练习案例，包括计算长度与次数的比例、定义并使用Dog类实例等，旨在帮助初学者理解类与对象的概念及应用。

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练习4：

public class twoSum {

    public static void main(String[] args){
        class PrintV{
            int times = 233;
            int length = 4211;

            public double returnV()
            {
                return (double)length/times;
            }
        }
        PrintV a = new PrintV();
        System.out.println(a.returnV());
    }
}

练习5

public class twoSum {

    public static void main(String[] args){
        class Dog{
          String name;
          String says;
          public Dog(){

          }
          public Dog(String name,String says){
              this.name = name;
              this.says = says;
          }
          public void PrintDog(){
              System.out.println("This dog's name is "+name +"and it says "+ says +"!");
          }
        }
        Dog spot = new Dog("sopt","Ruff");
        Dog scruffy = new Dog("scruffy","Wruf");
        spot.PrintDog();
        scruffy.PrintDog();
    }
}

练习6：

public class twoSum {

    public static void main(String[] args){
        class Dog{
          String name;
          String says;
          public Dog(){

          }
          public Dog(String name,String says){
              this.name = name;
              this.says = says;
          }
          public void PrintDog(){
              System.out.println("This dog's name is "+name +"and it says "+ says +"!");
          }
        }
        Dog spot = new Dog("sopt","Ruff");
        Dog scruffy = new Dog("scruffy","Ruff");
        spot.PrintDog();
        scruffy.PrintDog();
        System.out.println(spot.says.equals(scruffy.says));
    }
}

练习7：

public class twoSum {

    public static void main(String[] args){
        Random num = new Random(1);
        int m1 = num.nextInt(6);
        int m2 = num.nextInt(6);
        System.out.println(m1+","+m2);
    }
}