电梯运行规则:优先一个方向走到头, 再回头, 每经过一层, 就判断该层是否有人按了电梯
代码
importorg.junit.jupiter.api.Test;importjava.util.*;/** * 模拟电梯运行 * 运行规则: 电梯如果上行,会尽量一直上行到最高点,再回头下行到最低点 */publicclassElevator{// 存储每层楼是否有人按了上行或下行按键,电梯会一层一层运动,每到一层就判断一层privatefinalMap<Integer,String>map=newLinkedHashMap<>();// 存储所有的按键顺序,向上的键用正数,向下的键用负数privatefinalList<Integer>list=newLinkedList<>();@Testpublicvoidtest0708()throwsInterruptedException{// 记录电梯当前所在层, 1-16层intcurrentFloor=1;// 记录电梯当前的运动方向,上,下,静止Stringdirection="静止";// 存储最大最小楼层,用于判断是否立即返回intmaxFloor=1;intminFloor=16;Threadthread=newMyThread();thread.start();// 电梯一直在通电运行while(true){Thread.sleep(500);// 初始化最大最小楼层maxFloor=1;minFloor=16;for(inti:list){if(Math.abs(i)>maxFloor){maxFloor=Math.abs(i);}if(Math.abs(i)<minFloor){minFloor=Math.abs(i);}}if(list.size()>0){if("静止".equals(direction)){intnextFloor=Math.abs(list.get(0));if(nextFloor==currentFloor){System.out.println("开门");list.remove(0);}elseif(nextFloor>currentFloor){System.out.println("电梯上行");direction="向上";}else{System.out.println("电梯下行");direction="向下";}}elseif("向上".equals(direction)){currentFloor++;// 没有再向上了if(currentFloor>maxFloor){direction="静止";continue;}System.out.println("电梯到达"+currentFloor+"楼");Stringlight=map.get(currentFloor);if("上".equals(light)||"上,下".equals(light)){System.out.println("电梯开门");light=light.replace("上","").replace(",","");map.put(currentFloor,light);list.remove((Object)currentFloor);// 判断电梯是否还需要继续上行if(list.size()==0){direction="静止";continue;}// 是否继续上行booleanflag=false;for(inti=currentFloor;i<17;i++){if(StringUtils.isNotBlank(map.get(i))){flag=true;break;}}if(!flag){direction="静止";}}}elseif("向下".equals(direction)){currentFloor--;if(currentFloor<minFloor){direction="静止";continue;}System.out.println("电梯到达"+currentFloor+"楼");Stringlight=map.get(currentFloor);if("下".equals(light)||"上,下".equals(light)){System.out.println("电梯开门");light=light.replace("下","").replace(",","");map.put(currentFloor,light);list.remove((Object)(-1*currentFloor));// 判断电梯是否还需要继续下行if(list.size()==0){direction="静止";continue;}// 是否继续下行booleanflag=false;for(inti=currentFloor;i>0;i--){if(StringUtils.isNotBlank(map.get(i))){flag=true;break;}}if(!flag){direction="静止";}}}}}}classMyThreadextendsThread{@Overridepublicvoidrun(){// 模拟按键// 在3楼按向上按钮addOptions(3,"上");addOptions(6,"上");addOptions(3,"下");addOptions(4,"下");addOptions(10,"下");addOptions(5,"上");addOptions(12,"上");}publicvoidaddOptions(intfloor,Stringdirection){try{Thread.sleep(757);}catch(InterruptedExceptione){thrownewRuntimeException(e);}if("下".equals(direction)){list.add(-1*floor);}else{list.add(floor);}if(map.containsKey(floor)&&StringUtils.isNotBlank(map.get(floor))){if(!direction.equals(map.get(floor))){map.put(floor,"上,下");}}else{map.put(floor,direction);}System.out.println("乘客在"+floor+"楼按向"+direction+"箭头");}}}