实例 56
题目
设计一个装备类 Equipment
,该类有两个属性,一个是名字 name
,类型为字符串类型,另一个是价格 price
,类型为 int
。然后实例化 3 件具体装备并打印其名字和价格。
分析
主要考察类的创建以及如何实例化一个对象,并且伴随有重写 toString()
方法。
实现
代码语言:javascript复制/**
* Created with IntelliJ IDEA.
*
* @author : 村雨
* @version : 1.0
* @project : Java 编程实例
* @package : PACKAGE_NAME
* @className : Example56
* @createTime : 2021/7/3 22:23
* @email : 747731461@qq.com
* @公众号 : 村雨遥
* @website : https://cunyu1943.github.io
* @description :
*/
public class Example56 {
public static void main(String[] args) {
Equipment equipment1 = new Equipment("饮血之刃", 1500);
Equipment equipment2 = new Equipment("破军", 2000);
Equipment equipment3 = new Equipment("攻速鞋", 500);
System.out.println("伽罗目前的装备为:");
System.out.println(equipment1.toString());
System.out.println(equipment2.toString());
System.out.println(equipment3.toString());
}
}
class Equipment {
private String name;
private int price;
public Equipment() {
}
public Equipment(String name, int price) {
this.name = name;
this.price = price;
}
@Override
public String toString() {
return "装备名:" name ", 价格:" price;
}
}
结果
实例 57
题目
现在王者荣耀很火,相信大部分人也玩过,那我们就来定义一个英雄类,用来作为王者荣耀里的各英雄的父类。一般来讲,一个英雄有名字、血量、蓝量、初始移动速度、攻击值……,我们需要做的,就是将这些作为类的属性尽可能地添加到类中。
分析
主要考察如何定义类,以及如何添加类中的属性,而且如何选择属性的数据类型。
实现
代码语言:javascript复制/**
* Created with IntelliJ IDEA.
*
* @author : 村雨
* @version : 1.0
* @project : Java 编程实例
* @package : PACKAGE_NAME
* @className : Example57
* @createTime : 2021/7/4 8:40
* @email : 747731461@qq.com
* @公众号 : 村雨遥
* @website : https://cunyu1943.github.io
* @description :
*/
public class Example57 {
public static void main(String[] args) {
Hero hero = new Hero("虞姬", 3000, 1000, 50, 800, 0, 0, 0);
System.out.println("英雄信息如下");
System.out.println(hero.toString());
}
}
class Hero {
private String name;
private float hp;
private float mp;
private int initSpeed;
private int attack;
private int killed;
private int beKilled;
private int assist;
public Hero() {
}
public Hero(String name, float hp, float mp, int initSpeed, int attack, int killed, int beKilled, int assist) {
this.name = name;
this.hp = hp;
this.mp = mp;
this.initSpeed = initSpeed;
this.attack = attack;
this.killed = killed;
this.beKilled = beKilled;
this.assist = assist;
}
@Override
public String toString() {
final StringBuffer sb = new StringBuffer();
sb.append("名字 = '").append(name).append(''');
sb.append(", 血量 = ").append(hp);
sb.append(", 蓝量 = ").append(mp);
sb.append(", 初始速度 = ").append(initSpeed);
sb.append(", 攻击值 = ").append(attack);
sb.append(", 击杀数 = ").append(killed);
sb.append(", 被击杀数 = ").append(beKilled);
sb.append(", 助攻数 = ").append(assist);
return sb.toString();
}
}
结果
实例 58
题目
既然王者荣耀中的英雄有很多属性,而且也有很多装备,我们买了装备之后就会给我们的英雄加血量、加攻击值或则加移动速度之类。我们就来定义几个方法,用于购买装备后给我们的英雄增加属性值。
分析
主要考察如何给我们的类定义方法。
实现
代码语言:javascript复制/**
* Created with IntelliJ IDEA.
*
* @author : 村雨
* @version : 1.0
* @project : Java 编程实例
* @package : PACKAGE_NAME
* @className : Example58
* @createTime : 2021/7/4 8:58
* @email : 747731461@qq.com
* @公众号 : 村雨遥
* @website : https://cunyu1943.github.io
* @description :
*/
public class Example58 {
public static void main(String[] args) {
Hero hero = new Hero("虞姬", 3000, 1000, 50, 800, 0, 0, 0);
System.out.println("英雄初始信息如下");
System.out.println(hero.toString());
hero.addAttack(1000);
hero.addSpeed(100);
hero.addKilled(5);
System.out.println("英雄增加属性后信息如下");
System.out.println(hero.toString());
}
}
class Hero {
private String name;
private float hp;
private float mp;
private int initSpeed;
private int attack;
private int killed;
private int beKilled;
private int assist;
public Hero() {
}
public Hero(String name, float hp, float mp, int initSpeed, int attack, int killed, int beKilled, int assist) {
this.name = name;
this.hp = hp;
this.mp = mp;
this.initSpeed = initSpeed;
this.attack = attack;
this.killed = killed;
this.beKilled = beKilled;
this.assist = assist;
}
public void addSpeed(int add) {
System.out.println("购买了鞋子");
this.initSpeed = add;
}
public void addAttack(int add) {
System.out.println("购买了攻击装");
this.attack = add;
}
public void addKilled(int add) {
System.out.println("你击杀了一名敌人");
this.killed = add;
}
@Override
public String toString() {
final StringBuffer sb = new StringBuffer();
sb.append("名字 = '").append(name).append(''');
sb.append(", 血量 = ").append(hp);
sb.append(", 蓝量 = ").append(mp);
sb.append(", 初始速度 = ").append(initSpeed);
sb.append(", 攻击值 = ").append(attack);
sb.append(", 击杀数 = ").append(killed);
sb.append(", 被击杀数 = ").append(beKilled);
sb.append(", 助攻数 = ").append(assist);
return sb.toString();
}
}
结果
实例 59
题目
设计一个方法,用于计算你的 BMI 值是多少,其中 BMI = 体重(kg)/ 身高(m) * 身高(m)
分析
输入体重和身高,然后调用方法计算 BMI 即可。
实现
代码语言:javascript复制import java.util.Scanner;
/**
* Created with IntelliJ IDEA.
*
* @author : 村雨
* @version : 1.0
* @project : Java 编程实例
* @package : PACKAGE_NAME
* @className : Example59
* @createTime : 2021/7/4 9:46
* @email : 747731461@qq.com
* @公众号 : 村雨遥
* @website : https://cunyu1943.github.io
* @description :
*/
public class Example59 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("输入体重 kg");
float weight = scanner.nextFloat();
System.out.println("输入身高 m");
float height = scanner.nextFloat();
System.out.println("BMI = " calcBMI(height, weight));
}
public static double calcBMI(float height, float weight) {
return weight / height / height;
}
}
结果
实例 60
题目
通过输入的月份,判断该月处于哪一个季节。
分析
主要考察 switch
多分支的判断,而且要注意,要结束一个分支的判断时,需要有 break
。要注意 switch
自从 JDK 1.7 及之后是支持 String
类型的。当然也可以使用 if
进行判断。
实现
代码语言:javascript复制import java.util.Scanner;
/**
* Created with IntelliJ IDEA.
*
* @author : 村雨
* @version : 1.0
* @project : Java 编程实例
* @package : PACKAGE_NAME
* @className : Example60
* @createTime : 2021/7/4 10:00
* @email : 747731461@qq.com
* @公众号 : 村雨遥
* @website : https://cunyu1943.github.io
* @description :
*/
public class Example60 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("输入月份");
int month = scanner.nextInt();
switch (month) {
case 3:
case 4:
case 5:
System.out.println(month " 月是春季");
break;
case 6:
case 7:
case 8:
System.out.println(month " 月是夏季");
break;
case 9:
case 10:
case 11:
System.out.println(month " 月是秋季");
break;
case 12:
case 1:
case 2:
System.out.println(month " 月是冬季");
break;
default:
break;
}
}
}