JAVA学习日记(第七天)

面向对象综合训练

package com.itheima.loopdemo; import java.util.Random; public class Role { private String name; private int blood; public Role() { } public Role(String name, int blood) { this.name = name; this.blood = blood; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getBlood() { return blood; } public void setBlood(int blood) { this.blood = blood; } public void attack(Role role) { Random r = new Random(); int hurt = r.nextInt(20) + 1; int remainBoold = role.getBlood() - hurt; remainBoold = remainBoold < 0 ? 0 : remainBoold; role.setBlood(remainBoold); System.out.println(this.getName() + "举起了拳头,打了" + role.getName() + "一下" + "造成了" + hurt + "点伤害," + role.getName() + "还剩下" + remainBoold + "点血"); } }

package com.itheima.loopdemo; public class GameTest { public static void main(String[] args) { Role r1 = new Role("乔峰", 100); Role r2 = new Role("鸠摩智", 100); while (true) { r1.attack(r2); if (r2.getBlood() == 0) { System.out.println(r1.getName() + "K.O了" + r2.getName()); break; } r2.attack(r1); if (r1.getBlood() == 0) { System.out.println(r2.getName() + "K.O了" + r1.getName()); break; } } } }

API&字符串

String

package com.itheima.loopdemo; import java.util.Scanner; public class StringDemo { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入一个字符串"); String str = sc.next(); int bigCount = 0; int smallCount = 0; int numberCount = 0; for (int i = 0; i < str.length(); i++) { char c = str.charAt(i); System.out.println(c); if (c >= 'a' && c <= 'z') { smallCount++; } else if (c >= 'A' && c <= 'Z') { bigCount++; } else if (c >= '0' && c <= '9') { numberCount++; } } System.out.println("小写字母的数量为:" + smallCount); System.out.println("大写字母的数量为:" + bigCount); System.out.println("数字的数量为:" + numberCount); } }

两个代码我融合为了一个代码

package com.itheima.loopdemo; public class StringDemo { public static void main(String[] args) { String result = reverser("abc"); System.out.println(result); } public static String reverser(String str) { String result = ""; for (int i = str.length() - 1; i >= 0; i--) { char c = str.charAt(i); result = result + c; } return result; } }