找不到针对nextline/int的行 [英] No line found for nextline/int
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问题描述
我尝试让用户在while循环中以字符串和int形式输入一些值,但是,当我启动时没有找到Line时,我会尽力解决该问题,但对我没有任何帮助.我不知道如何让用户输入int和string的值.
I try to let the user input some values in string and int in while loop, however, when I start I get no Line found I tried my best on my own to solve it but nothing worked for me. I wonder how I let the user input the values for the int and string.
public static void main(String[] args) throws IOException {
// TODO code application logic here
int saldo = 10000;
String anw = "j";
int cost;
//create file
File f = new File("C:\\Users\\ae65255\\Desktop\\file.txt");
try{
f.createNewFile();
System.out.println("23");
//frågan
while(anw.equals("j")){
Scanner fileIn = new Scanner(f);
System.out.println("Ange utgiftspost:"); //post
String post = fileIn.nextLine();
System.out.println("Ange kostnad:"); //kost
cost=fileIn.nextInt();
fileIn.nextLine();
saldo = +saldo -cost;
System.out.println("saldo:" +saldo);
System.out.println("Vill du mata in fler uppgifter? (j/n) :");
anw = fileIn.nextLine();
String fileContent = "---"+post+"---"+cost+"---"+saldo;
PrintWriter writer ;
writer = new PrintWriter(f);
writer.println(fileContent);
if (anw.equals("n")) {
fileIn.close();
writer.close();
//System.out.println("---"+post+"---"+cost+"---"+saldo);
}
} //frågan slut
}
catch(Exception e){
System.err.println(e.getMessage());
}//frågan
//System.out.println("---"+post+"---"+cost+"---"+saldo);
System.out.println("File path" +f.getPath());
}
}
推荐答案
@AKSW注释解决了我的两个答案.使用Scanner in = new Scanner(System.in);
将使我从控制台获取用户输入.另一种是阻止它覆盖他最近的对这篇文章发表评论.
@AKSW comment solved my two answers. Using Scanner in = new Scanner(System.in);
would let me take the user input from the console. The other was to stop it overwrite the text it which was his latest comment on this post.
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