A simple example of Java reading and outputting from a file

The following editor will bring you an example of simply reading and outputting from a file in Java. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

Use Scanner to input and PrintStream to output

Function: read from in.txt and output to out.txt

Code:

Same as below

package ioTest;

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

public class TestMain {

  public static void main(String[] args) {
    try {
      Scanner sc=new Scanner(new File("in.txt"));
      PrintStream ps=new PrintStream("out.txt");
      while(sc.hasNext()){
        int a=sc.nextInt();
        System.out.print(a+" ");
        ps.println(a);
      }
      
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

}

## Result:

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