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java如何多组数据

2026-03-22 02:39:28Java

java如何多组数据

处理多组数据的方法

在Java中处理多组数据通常涉及输入输出、数据存储和循环结构。以下是几种常见场景的解决方案：

java如何多组数据

使用Scanner读取多组输入

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            System.out.println(a + b);
        }
        scanner.close();
    }
}

数组存储多组数据

int[][] data = new int[3][2];
data[0] = new int[]{1, 2};
data[1] = new int[]{3, 4};
data[2] = new int[]{5, 6};

for (int[] pair : data) {
    System.out.println(pair[0] + pair[1]);
}

集合框架处理动态数据组

import java.util.ArrayList;
import java.util.List;

List<int[]> dataList = new ArrayList<>();
dataList.add(new int[]{1, 2});
dataList.add(new int[]{3, 4});

for (int[] pair : dataList) {
    System.out.println(pair[0] * pair[1]);
}

文件读取多组数据

import java.io.File;
import java.util.Scanner;

try {
    Scanner fileScanner = new Scanner(new File("input.txt"));
    while (fileScanner.hasNextLine()) {
        String[] values = fileScanner.nextLine().split(" ");
        int x = Integer.parseInt(values[0]);
        int y = Integer.parseInt(values[1]);
        System.out.println(x - y);
    }
    fileScanner.close();
} catch (Exception e) {
    e.printStackTrace();
}

多线程处理大数据集

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

ExecutorService executor = Executors.newFixedThreadPool(4);
for (int i = 0; i < 10; i++) {
    final int index = i;
    executor.submit(() -> {
        System.out.println("Processing group " + index);
    });
}
executor.shutdown();

选择合适的方法取决于具体需求：