所以这是我的代码:
public static void getArmor(String treasure)
throws FileNotFoundException{
Random rand=new Random();
Scanner file=new Scanner(new File ("armor.txt"));
while(!file.next().equals(treasure)){
file.next(); //stack trace error here
}
int min=file.nextInt();
int max=file.nextInt();
int defense=min + (int)(Math.random() * ((max - min) + 1));
treasure=treasure.replace("_", " ");
System.out.println(treasure);
System.out.println("Defense: "+defense);
System.out.println("=====");
System.out.println();
}
public static void getTreasureClass(Monster monGet)
throws FileNotFoundException{
Random rand = new Random();
String tc=monGet.getTreasureClass();
while (tc.startsWith("tc:")){
Scanner scan=new Scanner(new File ("TreasureClassEx.txt"));
String eachLine=scan.nextLine();
while(!tc.equals(scan.next())){
eachLine=scan.nextLine();
}
for (int i=0;i<=rand.nextInt(3);i++){
tc=scan.next();
}
getArmor(tc); //stack trace error here
}
}
出于某种原因,我收到了 No such Element Exception
at java.util.Scanner.throwFor(Scanner.java:907)
at java.util.Scanner.next(Scanner.java:1416)
at LootGenerator.getArmor(LootGenerator.java:43)
at LootGenerator.getTreasureClass(LootGenerator.java:68)
at LootGenerator.getMonster(LootGenerator.java:127)
at LootGenerator.theGame(LootGenerator.java:19)
at LootGenerator.main(LootGenerator.java:11)
我不知道为什么。基本上我的程序正在搜索两个文本文件 - Armor.txt 和 TreasureClassEx.txt。getTreasureClass 从怪物那里接收一个宝藏类并搜索 txt 直到它到达一个基础盔甲项目(一个不以 tc: 开头的字符串)然后它搜索 getArmor 以寻找与它获得的基础盔甲名称相匹配的盔甲宝物类。任何意见,将不胜感激!谢谢!
txt 文件的链接在这里:http : //www.cis.upenn.edu/~cis110/hw/hw06/large_data.zip
即使扫描仪不再提供下一个元素,您似乎也在调用 next ……抛出异常。
while(!file.next().equals(treasure)){ file.next(); }
应该是这样的
boolean foundTreasure = false; while(file.hasNext()){ if(file.next().equals(treasure)){ foundTreasure = true; break; // found treasure, if you need to use it, assign to variable beforehand } } // out here, either we never found treasure at all, or the last element we looked as was treasure... act accordingly