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bufferedreader java

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

public class FileIO {
  public static void main(String[] args) {
    String[] names = {"John", "Carl", "Jerry"};
    try {
      BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"));
      writer.write("Writing to a file.");
      writer.write("
Here is another line.");
      for (String name : names) {
        writer.write("
" + name);
      }
      writer.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    
    try {
      BufferedReader reader = new BufferedReader(new FileReader("output.txt"));
      String line;
      while((line = reader.readLine()) != null) {
        System.out.println(line);
      }
      reader.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}
Comment

declare bufferedreader java

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

java bufferedreader

// best answer is to look at documentation from Oracle
https://docs.oracle.com/javase/8/docs/api/java/io/BufferedReader.html
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bufferedreader function

import.java.io.BufferedReader;

public static String IN() {
        java.io.BufferedReader d = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
        String str = "";
        try {
            str = d.readLine();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return str;
    }
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