DNF增幅模拟器以增幅等级为主要通关条件，可以提示需要增幅多少次，会碎掉多少装备。模拟运气为实际增幅花费有预料。

import java.util.Random;

public class DNF {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//增幅等级
		Random random = new Random();
		int a = 0;

		//摧毁装备数

		  int zb= 0;

		//增幅次数

		int i = 0;

		//额外增加的增幅几率 
		int c=1;
		System.out.println("-------------------------------DNF增幅模拟器----------------------------");

		while(a <= 13) { //增幅等级
			i++;
			switch(a) {
			case 0: a++;break;
			case 1: a++;break;
			case 2: a++;break;
			case 3: a++;break;
			case 4: if(random.nextInt(100)<=80+c){a++;}else{a--;}break;
			case 5: if(random.nextInt(100)<=70+c){a++;}else{a--;}break;
			case 6: if(random.nextInt(100)<=60+c){a++;}else{a--;}break;
			case 7: if(random.nextInt(100)<=70+c){a++;}else{a=4;}break;
			case 8: if(random.nextInt(100)<=60+c){a++;}else{a=5;}break;
			case 9: if(random.nextInt(100)<=50+c){a++;}else{a=6;}break;
			case 10: if(random.nextInt(100)<=40+c){a++;}else{a=0;zb++;}break;
			case 11: if(random.nextInt(100)<=30+c){a++;}else{a=0;zb++;}break;
			case 12: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 13: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 14: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 15: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 16: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 17: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 18: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 19: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 20: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 21: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 22: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			case 23: if(random.nextInt(100)<=20+c){a++;}else{a=0;zb++;}break;
			default: System.out.println(i+"---"+a+"---"+zb);
			}
		}
		
		System.out.println("增幅+"+a+"太极天帝剑");
		System.out.println("一共增幅了"+i+"次");
		System.out.println("炸了"+zb+"把太极天帝剑");
	}
}

演示效果结果：