bufferedreader in java

                                    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

                                    package com.javatpoint;  
import java.io.*;  
public class BufferedReaderExample {  
    public static void main(String args[])throws Exception{    
          FileReader fr=new FileReader("D:\\testout.txt");    
          BufferedReader br=new BufferedReader(fr);    
  
          int i;    
          while((i=br.read())!=-1){  
          System.out.print((char)i);  
          }  
          br.close();    
          fr.close();    
    }    
}    

                                    import java.io.BufferedReader;
//
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println(reader.readLine());

                                    package com.javatpoint;  
import java.io.*;  
public class BufferedReaderExample{    
public static void main(String args[])throws Exception{             
    InputStreamReader r=new InputStreamReader(System.in);    
    BufferedReader br=new BufferedReader(r);            
    System.out.println("Enter your name");    
    String name=br.readLine();    
    System.out.println("Welcome "+name);    
}    
}  

                                    class Main {
	public static void main (String[] args) throws IOException{
                      
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] str = br.readLine().split(" ");      // 6 2
		String[] input = br.readLine().split(" ");   // 1 2 3 4 5 6


		int n = Integer.parseInt(str[0]);  // 6
		int k = Integer.parseInt(str[1]);  // 2

		
      	int [] arr = new int [n];
		
      	for(int i=0; i<n; i++) 
		{
         arr[i] = Integer.parseInt(input[i]);  // 1 2 3 4 5 6
        }
	  
	  
	}
}