Java 输入输出挂

版本一

// 输入挂
Scanner cin = new Scanner(new BufferedInputStream(System.in));

// 输出挂
static BufferedWriter print = new BufferedWriter(new OutputStreamWriter(System.out));

// 示例
import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Scanner;

public class Main {
    static BufferedWriter print = new BufferedWriter(new OutputStreamWriter(System.out));
    public static void main(String[] args) throws IOException {
        Scanner cin = new Scanner(new BufferedInputStream(System.in));
        int n = cin.nextInt();
        for (int i = 0; i < n; i++) {
            int a = cin.nextInt();
            int b = cin.nextInt();
            print.write(a + b + "\n");
            print.flush();
        }
    }
}

版本二

// 输入挂
class InputReader{
    private final static int BUF_SZ = 65536;
    BufferedReader in;
    StringTokenizer tokenizer;
    public InputReader(InputStream in) {
        super();
        this.in = new BufferedReader(new InputStreamReader(in),BUF_SZ);
        tokenizer = new StringTokenizer("");
    }
    private String next() {
        while (!tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(in.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }
    public int nextInt() {
        return Integer.parseInt(next());
    }
}

public static InputReader in = new InputReader(System.in);

// 输出挂
public static PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));

// 示例
import java.io.*;
import java.util.*;

class InputReader {
    private final static int BUF_SZ = 65536;
    BufferedReader in;
    StringTokenizer tokenizer;

    public InputReader(InputStream in) {
        super();
        this.in = new BufferedReader(new InputStreamReader(in), BUF_SZ);
        tokenizer = new StringTokenizer("");
    }

    private String next() throws IOException {
        while (!tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(in.readLine());
        }
        return tokenizer.nextToken();
    }

    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
}

public class Main {
    public static InputReader in = new InputReader(System.in);
    public static PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
    public static void main(String[] args) throws IOException {
        Scanner cin = new Scanner(System.in);
        int n = cin.nextInt();
        for (int i = 0; i < n; i++) {
            int a = cin.nextInt();
            int b = cin.nextInt();
            out.write(a + b + "\n");
            out.flush();
        }
        out.close();
    }
}