bufferedreader in java

1try {
2	File file = new File("data.txt");
3	BufferedReader reader = new BufferedReader(new FileReader(file));
4	String line;
5
6	while((line = reader.readLine()) != null) {
7	 	 System.out.println(line);
8	}
9} catch(IOException e) {
10  	e.printStackTrace();
11}

1import java.io.BufferedReader;
2//
3BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
4System.out.println(reader.readLine());

1class Main {
2	public static void main (String[] args) throws IOException{
3                      
4		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
5		String[] str = br.readLine().split(" ");      // 6 2
6		String[] input = br.readLine().split(" ");   // 1 2 3 4 5 6
7
8
9		int n = Integer.parseInt(str[0]);  // 6
10		int k = Integer.parseInt(str[1]);  // 2
11
12		
13      	int [] arr = new int [n];
14		
15      	for(int i=0; i<n; i++) 
16		{
17         arr[i] = Integer.parseInt(input[i]);  // 1 2 3 4 5 6
18        }
19	  
20	  
21	}
22}
23

1BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

1package com.javatpoint;  
2import java.io.*;  
3public class BufferedReaderExample {  
4    public static void main(String args[])throws Exception{    
5          FileReader fr=new FileReader("D:\\testout.txt");    
6          BufferedReader br=new BufferedReader(fr);    
7  
8          int i;    
9          while((i=br.read())!=-1){  
10          System.out.print((char)i);  
11          }  
12          br.close();    
13          fr.close();    
14    }    
15}    

1package com.javatpoint;  
2import java.io.*;  
3public class BufferedReaderExample{    
4public static void main(String args[])throws Exception{             
5    InputStreamReader r=new InputStreamReader(System.in);    
6    BufferedReader br=new BufferedReader(r);            
7    System.out.println("Enter your name");    
8    String name=br.readLine();    
9    System.out.println("Welcome "+name);    
10}    
11}