자바 인프런 - 입출력 API

-FileInputStream 사용법

import java.io.InputStream;

import java.io.FileInputStream;

public class InputOutput {

public static void main(String[] args) {

  inputStream inputs = null;

try {

Iinputs = new FileInputStream("C:\\Users\\hyk\\Desktop\\testinout.txt");

while(true) {

int i = inputs.read();

System.out.println("입력 받은 데이터:"+i);

if(i == -1) break;

}

} catch (Exception e) {

System.out.println(e.getMessage());

} finally {

try {

if (inputs != null) inputs.close();

} catch (IOException e2) {

System.out.prinln(ex.getMassage());

}

    }

    }

}

-FileOutputStream 사용법

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

public class InputOutput {

public static void main(String[] args) {

OutputStream outputs = null;

try {

outputs = new FileOutputStream("C:\\Users\\hyk\\Desktop\\testout.txt");

String str1 = "안녕하세요";

byte[] bs = str1.getBytes();

outputs.write(bs);

} catch (Exception e) {

System.out.println(e.getMessage());

} finally {

try {

if(outputs != null) outputs.close();

} catch (IOException e2) {

System.out.println(e2.getMessage());

}

}

}

}

-DataInput/OutputStream 사용법, 파일복사하기

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

public class InputOutput {

public static void main(String[] args) {

InputStream inputs = null;

DataInputStream Dis = null;

OutputStream outputs = null;

DataOutputStream Dos = null;

try {

inputs = new FileInputStream("경로");

Dis = new DataInputStream(inputs);

String str = Dis.readUTF();

outputs = new FileOutputStream("경로");

Dos = new DataOutputStream(outputs);

Dos.writeUTF(str);;

} catch (Exception e) {

System.out.println(e.getMessage());

} finally {

if(Dos != null) {

try {

Dos.close();

} catch (Exception e2) {

}

if(outputs != null) {

try {

outputs.close();

} catch (Exception e2) {

}

}

}