1.文字格斗游戏
public class Role {
private String name;
private int health;
public Role(String name, int health) {
this.name = name;
this.health = health;
}
public String getName() {
return name;
}
public int getHealth() {
return health;
}
public void attack(Role another) {
int damage = new Random().nextInt(20) + 1;
System.out.println(this.name + "举起拳头打了" + another.name + "一下，造成了" + damage + "点伤害，" + another.name + "还剩下" + (another.health - damage) + "点血。");
another.health = Math.max(0, another.health - damage);
if (another.health == 0) {
System.out.println(this.name + "K.0.了" + another.name);
}
}
}
public class FightingGame {
public static void main(String[] args) {
Role qiaofeng = new Role("乔峰", 100);
Role jiumozhi = new Role("鸠摩智", 100);
while (qiaofeng.getHealth() > 0 && jiumozhi.getHealth() > 0) {
qiaofeng.attack(jiumozhi);
jiumozhi.attack(qiaofeng);
}
}
}
2.数组练习
（1）a.
int[] arr = new int[100];
for (int i = 0; i < arr.length; i++) {
arr[i] = i + 1;
}
int sum = 0;
for (int i = 0; i < arr.length; i += 2) {
sum += arr[i];
}
System.out.println("奇数位置的和为：" + sum);
（2）冒泡排序
Scanner scanner = new Scanner(System.in);
int[] arr = new int[10];
for (int i = 0; i < arr.length; i++) {
arr[i] = scanner.nextInt();
}
for (int i = 0; i < arr.length - 1; i++) {
for (int j = 0; j < arr.length - i - 1; j++) {
if (arr[j] > arr[j + 1]) {
int temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
System.out.println("排序后的数组为：" + Arrays.toString(arr));
（3）
int[] arr = new int[10];
int sum = 0;
for (int i = 0; i < arr.length; i++) {
arr[i] = new Random().
3.对象数组练习
（1）
public class Car {
private String brand;
private int price;
private String color;
public Car(String brand, int price, String color) {
this.brand = brand;
this.price = price;
this.color = color;
}
public String getBrand() {
return brand;
}
public int getPrice() {
return price;
}
public String getColor() {
return color;
}
}
Scanner scanner = new Scanner(System.in);
Car[] cars = new Car[3];
for (int i = 0; i < cars.length; i++) {
System.out.println("请输入第" + (i + 1) + "部汽车的品牌、价格、颜色：");
String brand = scanner.next();
int price = scanner.nextInt();
String color = scanner.next();
cars[i] = new Car(brand, price, color);
}
（2）
public class Phone {
private String brand;
private int price;
private String color;
public Phone(String brand, int price, String color) {
this.brand = brand;
this.price = price;
this.color = color;
}
public String getBrand() {
return brand;
}
public int getPrice() {
return price;
}
public String getColor() {
return color;
}
}
Scanner scanner = new Scanner(System.in);
Phone[] phones = new Phone[3];
int sum = 0;
for (int i = 0; i < phones.length; i++) {
System.out.println("请输入第" + (i + 1) + "部手机的品牌、价格、颜色：");
String brand = scanner.next();
int price = scanner.nextInt();
String color = scanner.next();
phones[i] = new Phone(brand, price, color);
sum += price;
}
double avgPrice = (double) sum / phones.length;
System.out.println("三部手机的平均价格为：" + avgPrice);
（3）
public class Girlfriend {
private String name;
private int age;
private String gender;
private String hobby;
public Girlfriend(String name, int age, String gender, String hobby) {
this.name = name;
this.age = age;
this.gender = gender;
this.hobby = hobby;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getGender() {
return gender;
}
public String getHobby() {
return hobby;
}
}
Scanner scanner = new Scanner(System.in);
Girlfriend[] girlfriends = new Girlfriend[4];
int sumAge = 0;
for (int i = 0; i < girlfriends.length; i++) {
System.out.println("请输入第" + (i + 1) + "个女朋友的姓名、年龄、性别、爱好：");
String name = scanner.next();
int age = scanner.nextInt();
String gender = scanner.next();
String hobby = scanner.next();
girlfriends[i] = new Girlfriend(name, age, gender, hobby);
sumAge += age;
}
double avgAge = (double) sumAge / girlfriends.length;
System.out.println("四个女朋友的平均年龄为：" + avgAge);
int count = 0;
for (Girlfriend gf : girlfriends) {
if (gf.getAge() < avgAge) {
count++;
System.out.println(gf.getName() + "、" + gf.getAge() + "、" + gf.getGender() + "、" + gf.getHobby());
}
}
System.out.println("年龄比平均值低的女朋友有" + count + "个。");
