在java中读取输入 [英] Reading inputs in java

问题描述

import java.io.*;
public class inputting {
/**
* @param args
* @throws IOException 
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("number??");
String str;
     int i=0;
    while (i<5) {
            str=br.readLine();
            int n = Integer.parseInt(str);
            System.out.println(n);
        i++;}
}

}

如果我想读取 5 个整数，我该怎么做?我需要写什么额外的代码?

if i want to read 5 integers how do i do that? what extra code i need to write?

推荐答案

您应该始终使用 Java Scanner 来读取输入.

You should always use a Java Scanner to read inputs.

对于您现有的代码，假设 String str = br.readLine(); 使 str 包含至少一个整数的行，例如.10 20 30 40 50"

To your existing code, assuming String str = br.readLine(); makes str contain the line of at least one integer, eg. "10 20 30 40 50"

您需要做的是:

Scanner sc = new Scanner(str);
While (sc.hasNext())
{
   System.out.println(sc.nextInt());
   // ...or assign it to an array elment...your choice!
}

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