第十次作业

 1.输入6位密码，再次输入密码，如果不够6位，提示，位数不对，如果两次不一致，提示两次密码不一致。

package sykjxy.com;
import java.util.Scanner;
public class shuiguo {

        public static void pw()
        {
            Scanner input=new Scanner(System.in);
            String pass;
            String repass;
            System.out.println("请输入6位密码");
            pass=input.next();
            testfun_1(pass);
            System.out.println("请重新输入密码");
            repass=input.next();
            testfun_1(repass);
            testfun_2(pass,repass);
        }
        public static void testfun_2(String test,String retest)
        {
            if(!test.equals(retest))
            {
                System.out.println("密码不一致");
                System.exit(0);
            }
        }
        public static void testfun_1(String test)
        {
            if(test.length()!=6)
            {
                System.out.println("位数不对");
                System.exit(0);
            }
        }


        public static void main(String[] args) {
// TODO Auto-generated method stub
            pw();
        }

    }

2.输入一个字符串，判断里面数字、大写字母、小写字母,其他字符的个数

package sykjxy.com;
import java.util.Scanner;
public class shuiguo {
    public static void main(String[] args) {
// TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        int a=0;
        int s=0;
        int b=0;
        int f=0;
        System.out.println("请输入字符串");
        String test=input.next();

        for(char i:test.toCharArray())
        {
            if(i<=57&&i>=48)
            {
                a++;
            }else if(i<=90&&i>=65)
            {
                s++;
            }else if(i<=122&i>=97)
            {
                b++;
            }else
            {
                f++;
            }
        }
        System.out.println("数字有:"+a+"个");
        System.out.println("大写字母有:"+s+"个");
        System.out.println("小写字母有:"+b+"个");
        System.out.println("其他字符有:"+f+"个");

        }

    }

 

5、利用接口实现动态的创建对象[选做题]

• 5.1 创建4个类：苹果、香蕉、葡萄、园丁  

• 5.2 在三种水果的构造方法中打印一句话.以苹果类为例

package sykj.com;

public class apple implements fruit {

    public apple() {

        System.out.println("苹果类");

    }

}

package sykj.com;

public class banana implements fruit {



    public banana() {

        System.out.println("香蕉类");

    }

}

package sykj.com;

public interface fruit {
}

package sykj.com;

public class grape implements fruit {

    public grape() {

        System.out.println("葡萄类");

    }
}

package sykj.com;

import java.util.Scanner;

public class lei {

    public fruit create() {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入");

        String name = input.next();

        fruit b = null;

        if (name.equals("苹果")) {

            b = new apple();

        } else if (name.equals("香蕉")) {

            b = new banana();

        } else if (name.equals("葡萄")) {

            b = new grape();

        }

        return b;


    }

    public static void main(String[] args) {

        lei x = new lei();

        x.create();


    }
}