GCIOTemplate.java

import java.io.IOException;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.ArrayList;

public class GCIOTemplate {
	
    public static List<String> readFile(String path, String fileName) throws IOException {
        Path inFilePath = Paths.get(path, fileName);
        Charset charset = Charset.forName("ISO-8859-1");
        return Files.readAllLines(inFilePath, charset);
    }

    public static void writeFile(String filePath, ArrayList<String> inputToWrite) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter(filePath));
        for (int i = 0; i < inputToWrite.size(); i++) {
            bw.write("Case #" + (i + 1) + ": " + inputToWrite.get(i));
            if (i < inputToWrite.size() - 1)
                bw.newLine();
        }
        bw.close();
    }

}

GCJTemplate.java

import java.util.*;
import java.io.*;

public class GCJTemplate {

	public static void main(String[] args) {
    	Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in))); // MY_PROGRAM < large_input.txt > large_output.txt
    	int testCases = in.nextInt();

    	for (int i = 1; i <= testCases; i++) {
    		int n = in.nextInt();
    		System.out.println("Case #" + i + ": " + n);
    	}
	}

}