Java 输入多行字符串或者多个int数值

怼烎@ 2022-03-08 14:20 204阅读 0赞

转载自[https://blog.csdn.net/DoneSpeak/article/details/77800632][https_blog.csdn.net_DoneSpeak_article_details_77800632]

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import java.util.Scanner;
    
    public class Main {
    
        public static void main(String[] args) {
    
            inputStr();
            inputInteger();
            inputIntInLine();
    
        }
        //每行输入一个数值，输入多个数值
        public static void inputInteger() {
            Scanner scanner = new Scanner(System.in);
            String nextLine = scanner.nextLine();
            int sum = 0;
    
            while (nextLine != null && !nextLine.equals("")) {
                sum += Integer.parseInt(nextLine);
                System.out.println(sum);
                nextLine = scanner.nextLine();
            }
    
            System.out.println("end of input integer");
        }
        // 每行输入一个字符串，输入多个字符串
        public static void inputStr() {
            Scanner scanner = new Scanner(System.in);
            String nextLine = scanner.nextLine();
            while (nextLine != null && !nextLine.equals("")) {
                System.out.println(nextLine);
                nextLine = scanner.nextLine();
            }
    
            System.out.println("end of input string");
        }
        //输入多个数值，用空格隔开
        public static void inputIntInLine() {
            Scanner scanner = new Scanner(System.in);
            String str = scanner.nextLine();
            String[] numstr = str.split(" ");
            int[] nums = new int[numstr.length];
            for(int i = 0; i < numstr.length; i ++) {
                nums[i] = Integer.parseInt(numstr[i]);
            }
            for(int n: nums) {
                System.out.println(n);
            }
            System.out.println("end of input int in a line");
    
        }
    }

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## 做算法题目时用的输入 ##

以下方法在做算法题目时能够正确的结束输入。

import java.util.Scanner;
    
    public class Main{
        public static void main(String[] args){
    
            Scanner sc =  new Scanner(System.in);
    
            //while(sc.hasNextLine()){    
            while(sc.hasNext()){
                String str = sc.nextLine();
                System.out.println(str);
            }
    
            sc.close();
        }
    }

[https_blog.csdn.net_DoneSpeak_article_details_77800632]: https://blog.csdn.net/DoneSpeak/article/details/77800632