我正在制作游戏,目前我需要为“英雄”设置名称。这需要玩家输入英雄的名字。 问题是,当它在控制台中询问英雄1的名字时,它只是跳过并直接进入英雄2。 如果我使用.next()而不是.nextLine(),它可以工作,但它会将任何带有空格的名称解释为两个不同的名称!
这是代码,希望有意义!提前全部谢谢:)
public void heroNames() //sets the name of heroes
{
int count = 1;
while (count <= numHeroes)
{
System.out.println("Enter a name for hero number " + count);
String name = scanner.nextLine();
if(heroNames.contains(name)) //bug needs to be fixed here - does not wait for user input for first hero name
{
System.out.println("You already have a hero with this name. Please choose another name!");
}
else
{
heroNames.add(name);
count++; //increases count by 1 to move to next hero
}
}
}
答案 0 :(得分:1)
如果您使用numHeroes
读取Scanner.nextInt
,则其换行符中仍会保留换行符,因此以下Scanner.nextLine
会返回一个空字符串,从而有效地生成两个连续的序列{{ 1}}获得第一个英雄名字。
在下面的代码中,我建议您阅读带有Scanner.nextLine()
的英雄数量,并且,作为一种风格,不要使用局部变量Integer.parseInt(scanner.nextLine)
,因为它隐含地限制了大小的count
heroNames
集合:
Scanner scanner = new Scanner(System.in);
List<String> heroNames = new ArrayList<>();
int numHeroes;
System.out.println("How many heroes do you want to play with?");
while (true) {
try {
numHeroes = Integer.parseInt(scanner.nextLine());
break;
} catch (NumberFormatException e) {
// continue
}
}
while (heroNames.size() < numHeroes) {
System.out.println("Type hero name ("
+ (numHeroes - heroNames.size()) + "/" + numHeroes + " missing):");
String name = scanner.nextLine();
if (heroNames.contains(name)) {
System.out.println(name + " already given. Type a different one:");
} else if (name != null && !name.isEmpty()) {
heroNames.add(name);
}
}
System.out.println("Hero names: " + heroNames);