JAVA chapter18. IO 기반 입출력 및 네트워킹. 18.1 IO 패키지 소개, 18.2 입력 스트림과 출력 스트림

JAVA chapter18. IO 기반 입출력 및 네트워킹. 

18.1 IO 패키지 소개

18.2 입력 스트림과 출력 스트림

18.2.1 InputStream

package sec02.exam01_inputstream_read;
 
import java.io.FileInputStream;
import java.io.InputStream;
 
public class ReadExample1 {
 
    public static void main(String[] args) throws Exception {
        InputStream is = new FileInputStream("C:/Temp/test.txt");
        int readByte;
        while(true) {
            readByte = is.read();
            if(readByte == -1) break;
            System.out.println((char)readByte);
        }
        is.close();
    }
}

18.2.2 OutputStream

package sec02.exam02_outputstream_write;
 
import java.io.FileOutputStream;
import java.io.OutputStream;
 
public class WriteExample1 {
 
    public static void main(String[] args) throws Exception {
        OutputStream os = new FileOutputStream("C:/Temp/test.txt");
        byte[] data = "ABC".getBytes();
        for(int i=0; i<data.length; i++) {
            os.write(data[i]);
        }
        os.flush();
        os.close();
    }
}

18.2.3 Reader

package sec02.exam03_reader_read;
 
import java.io.FileReader;
import java.io.Reader;
 
public class ReadExample1 {
 
    public static void main(String[] args) throws Exception {
        Reader reader = new FileReader("C:/Temp/test.txt");
        int readData;
        while( true ) {
            readData = reader.read();
            if(readData == -1) break;
            System.out.print((char)readData);
        }    
        reader.close();
    }
}