JAVA File 관련 예제

자바 파일 관련 예제입니다.

package com.oraclejava.exam2;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.io.PrintWriter;

public class io {

public static void main(String[] arg) throws IOException {

File myFile = new File("myFile.txt");

if(myFile.exists()) {

System.out.println("파일이 존재합니다.");

}

else {

System.out.println("파일이 존재하지않습니다.");

try {

myFile.createNewFile();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

PrintWriter writer;

try {

writer = new PrintWriter(myFile);

writer.println("안녕하세요.");

writer.println("오늘도 힘들게 지나갑니다.");

writer.close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

FileWriter writer2 = new FileWriter("myFile2.txt");

writer2.write("또 하루 지나간다.\r\n");

writer2.write("또 하루 지나간다2.\r\n");

writer2.close();

}

}

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package com.oraclejava.exam2;

import java.io.BufferedReader;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

public class io2 {

public static void main(String[] arg) throws IOException {

BufferedReader br = null;

br = new BufferedReader(new FileReader("myFile.txt"));

String line;

while((line = br.readLine()) != null) {

System.out.println(line);

}

br.close();

}

}