最近在学习java，力求能够独立编写好《Head First》中的每个小项目，关于击沉战舰小游戏算是《Head First》里比较典型的应用案例吧，这里我没有用内本书里提供的Helper类，类似Helper类的方法是自己写的，纯粹是自己的想法和设计，但最后的执行效果非常棒，甚至要比用helper的效果更好，我觉得既然是学习，能够把一些东西变成自己的（自己独立写出功能）肯定最好啦~~
话不多说，上CODE，该上的注释都上了，共同学习哦：）
package ArraylistApplyForSinkBoatGame;import java.util.ArrayList;public class Boat {ArrayList<String> boatLocation=new ArrayList<String>();String boatName;public void setBoatName(String name){boatName=name;}public String getBoatName(){return boatName;}public ArrayList<String> getBoatString(){return boatLocation;}public void addLocation(String loc){boatLocation.add(loc);}void removeLocation(String loc,int index){boatLocation.remove(index);}boolean arrylislIsEmpty(){if(boatLocation.isEmpty())return true;return false;}}
package ArraylistApplyForSinkBoatGame;
public class Game {
String[][] sea2d={{"A1","A2","A3","A4","A5","A6","A7","A8","A9","A10"},{"B1","B2","B3","B4","B5","B6","B7","B8","B9","B10"},{"C1","C2","C3","C4","C5","C6","C7","C8","C9","C10"},{"D1","D2","D3","D4","D5","D6","D7","D8","D9","D10"},{"E1","E2","E3","E4","E5","E6","E7","E8","E9","E10"},{"F1","F2","F3","F4","F5","F6","F7","F8","F9","F10"},{"G1","G2","G3","G4","G5","G6","G7","G8","G9","G10"},{"H1","H2","H3","H4","H5","H6","H7","H8","H9","H10"},{"I1","I2","I3","I4","I5","I6","I7","I8","I9","I10"},{"J1","J2","J3","J4","J5","J6","J7","J8","J9","J10"},};public String xyIntoString(int x,int y){return sea2d[x][y];}
}
package ArraylistApplyForSinkBoatGame;import java.util.ArrayList;import java.util.Scanner;public class StartGame {public static void main(String[] args){int i=0,rad,randomX,randomY,tempX=0,tempY=0,tryTimes=0;String str=null;boolean ber=false,berHit; ArrayList<Boat> boats=new ArrayList<Boat>();//存储boat对象的ArraylistScanner scan=new Scanner(System.in);//输入对象Game myGame=new Game();//分别创建三个船对象，名字分别为boatone、boattwo、boatthreeBoat boat1=new Boat(); boat1.setBoatName("boatone");boats.add(boat1); Boat boat2=new Boat();boat2.setBoatName("boattwo");boats.add(boat2); Boat boat3=new Boat();boat3.setBoatName("boatthree");boats.add(boat3);Object o=new Object();//用于拿出来Arraylist中的某个对象//产生船所在的随机位置for(Boat bo:boats){ randomX=(int)(Math.random()*10);randomY=(int)(Math.random()*10);tempX=randomX+3;tempY=randomY+3;while(tempX>10||tempY>10){//用循环筛去计算机随机产生的船首位置+3后(船长度为3，加三后为船尾)溢出数组的随机数，这里数组最大值为10randomX=(int)(Math.random()*10);randomY=(int)(Math.random()*10);tempX=randomX+3;tempY=randomY+3;} rad=(int)Math.random()*10;//随机一个数，以此设置船占三个位置的方向（上下或左右）if(rad%2==0){bo.addLocation(myGame.xyIntoString(randomX, randomY));//产生的随机数即为二维数组中的行列号，按照该行列号将Game类中字符数组对应位置元素添加至Boat类中String类型的Arrayli中bo.addLocation(myGame.xyIntoString(randomX+1, randomY)); bo.addLocation(myGame.xyIntoString(randomX+2, randomY)); if(!bo.arrylislIsEmpty()){//打印随机产生的船位置，下同System.out.println(bo.boatName+"in sight"); for(i=0;i<3;i++){o=bo.boatLocation.get(i);System.out.println(o);}} }else{bo.addLocation(myGame.xyIntoString(randomX, randomY));bo.addLocation(myGame.xyIntoString(randomX, randomY+1)); bo.addLocation(myGame.xyIntoString(randomX, randomY+2)); if(!bo.arrylislIsEmpty()){//同上:)System.out.println(bo.boatName+"in sight"); for(i=0;i<3;i++){o=bo.boatLocation.get(i);System.out.println(o);}}}}//endSystem.out.println("\n :) Ready for the Game,Let's do it!!\n");//准备开始游戏//依据输入击沉船 while(!boats.isEmpty()){berHit=true;//用于标记击中与否System.out.println("input your attack:)\n");tryTimes++;//记录尝试次数str=scan.nextLine();//用户输入打击目标for(Boat bot:boats){//遍历存储Boat对象的ArrayList for(String st:bot.getBoatString()){ //遍历存储Boat对象的ArrayList中的，每个存储String类型对象的Arraylistif(st.equals(str)){System.out.println("You have hit "+bot.boatName+"!!");bot.getBoatString().remove(st); //击中后将boat中的击中位置删去if(bot.getBoatString().isEmpty()){System.out.println("OH GOD!You have sunk "+bot.boatName+"!!\nLet's sink next boat!\n");boats.remove(bot);//从存储Boat对象的Arraylist中，删去某个被三个位置都击中的船对象}ber=true;berHit=false;break;}}if(ber){//若击中一只船，直接跳出两层循环ber=false;break;}} if(berHit){//未击中提示System.out.println("Good hit,but..you missed (T^T)\nCome on! try again! :) ");}}//游戏结束System.out.println("After "+tryTimes+" times hits\nI can't believe it...\n OMG!!YOU HAVE WON ↖(^ω^)↗!!!!"); scan.close(); }//main() }
