问题如下，要求能够输出其中的全部内容，使用System.out.println();

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

public class Demo{
static long i;
public static void main(String[]args)throws IOException{

    System.out.println("\n\n\ti="+i+"\n\t");
    
    
    
    
    /*
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));//建立数据通道
    
    int x1 = Integer.parseInt(br.readLine());//数据类型转换
    int y1 = Integer.parseInt(br.readLine());
    System.out.println("x1 + y1 = "+ x1 + y1);
    */
    /*
    double i;
    
    Scanner sc = new Scanner(System.in);
    i = sc.nextDouble();
    System.out.println(i);
    */
}

}
import java.util.Scanner;
import java.io.*;

public class Test{

static int i=100;

public static void main(String[] args) {
    /*

    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));//建立数据通道
    
    int x1 = Integer.parseInt(br.readLine());//数据类型转换
    int y1 = Integer.parseInt(br.readLine());
    System.out.println("x1 + y1 = "+ x1 + y1);
    */
    
    
    
    
    int i=200;
    //Scanner sc = new Scanner(System.in);
    System.out.print("i=");
    //i=sc.nextInt();
    System.out.println("i=" + i);
    
    

    
    
    
    /*
    char sex = '中国';
    System.out.println(sex);
    char sex1 = '\u0079';
    System.out.println(sex1);
    */
    
    /*
    int x0 = -123456;
    System.out.println("x0=："+ Integer.toBinaryString(x0));
    //System.out.println("x0=："+ x0);
    int x1 = 0x10;
    //System.out.println("x1=："+ Integer.toOctalString(x1));
    int x2 = 0X20;
    System.out.println("x2=："+ x2);
    */
}

}

是要求输出文件的内容，还是别的数据呢？