第十次作业

package Demo01;

public interface Fruit {

class Apple implements Fruit{

public Apple() {

System.out.println("创建了一个苹果类的对象");

}

}

class Pear implements Fruit{

public Pear() {

System.out.println("创建了一个香蕉类的对象");

}

}

class Oranges implements Fruit{

public Oranges() {

System.out.println("创建了一个葡萄类的对象");

}

}

}

package Demo01;

import java.util.Scanner;

import Demo01.Fruit.Apple;

import Demo01.Fruit.Oranges;

import Demo01.Fruit.Pear;

public class Gardener {

public static void main(String[] args) {

// TODO Auto-generated method stub

Gardener g=new Gardener();

g.create();

}

 

 

public Fruit create() {

Scanner sc=new Scanner(System.in);

System.out.println("请输入水果名称");

String name=sc.next();

Fruit f=null;

if(name.equals("苹果")) {

f=new Apple();

}else if(name.equals("香蕉")) {

f=new Pear();

}else if(name.equals("葡萄")) {

f=new Oranges();

}

return f;

}

 

 

}

length()

equals()

package workdemo10;

import java.util.Scanner;

public class zifuchuan {

public static void main(String[] args) {

// TODO Auto-generated method stub

// 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。

//

// length()

// equals()

Scanner sc=new Scanner(System.in);

System.out.println("请输入您的密码");

String password1=sc.next();

System.out.println("请再次输入密码");

String password2=sc.next();

if(password1.length()>0&&password1.length()<6) {

System.out.println("位数不足");

}else if(!password1.equals(password2)) {

System.out.println("两次密码不一致");

}

}

}

toCharArray();

package workdemo10;

import java.util.Scanner;

public class zifu {

public static void main(String[] args) {

// TODO Auto-generated method stub

// 3.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

// toCharArray();

Scanner sc=new Scanner(System.in);

System.out.println("请输入一段字符串");

String zf=sc.next();

int dax=0;

int xiaox=0;

int qita=0;

for (int i = 0; i < zf.length(); i++) {

char c=zf.charAt(i);

if(Character.isUpperCase(c)){

dax++;

}else if(Character.isLowerCase(c)){

xiaox++;

}

}

qita=zf.length()-dax-xiaox;

System.out.println("字符串中大写的字母数为："+dax+"\n小写的字母数为："+xiaox+"\n其他字符数为："+qita);

}

}

4.输入一个字符串，如果开头是ok并且包含no，那么输入错误
package workdemo10;

import java.util.Scanner;

public class changs {

static Scanner sc=new Scanner(System.in);

public static void shuru(){

 

System.out.println("请输入一段字符");

String string=sc.next();

if(string.startsWith("ok")&&string.contains("no")){

System.out.println("输入错误");

}else{

 

System.out.println("输入正确");

}

System.out.println("是否从新输入？Y/N");

if (sc.next().equalsIgnoreCase("y")){

panduan();

} else {

System.out.println("谢谢使用");

}

}

public static void panduan(){

shuru();

}

}

package workdemo10;

public class changsText {

public static void main(String[] args) {

// TODO Auto-generated method stub

changs c=new changs();

c.shuru();

}

}

STU

manage

system

输出

StuManageSystem

可以考虑：charAt ,touppercase,tolowercase，等等。字符串连接+ concat

package workdemo10;

import java.util.Scanner;

public class zfpingjie {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc=new Scanner(System.in);

System.out.println("请输入第一段字符串");

String s1=sc.next();//STU

String string0=s1.substring(0, 1);//S

String string1=s1.substring(1,3).toLowerCase();//tu

 

System.out.println("请输入第二段字符串");

String s2=sc.next();//manage

String string2=s2.substring(0, 1).toUpperCase();//M

String string3=s2.substring(1, 6);//anage

 

System.out.println("请输入第三段字符串");

String s3=sc.next();//system

String string4=s3.substring(0, 1).toUpperCase();

String string5=s3.substring(1, 6);

System.out.println(string0+string1+string2+string3+string4+string5);

}

}