====== Ch.18 입출력 스트림 ======
=====스트림 소개=====

=====바이트 기반 입력 스트림=====
<code java>
package chapter18;

import java.io.IOException;
import java.io.InputStream;

public class InputStreamEx {

	public static void main(String[] args) {
		
		try {
			InputStream in = System.in;
			int data = 0;
			while((data=in.read()) != -1) {
				System.out.print((char)data);
			}
		} catch (IOException e) {
			
		}
		// 한글 테스트
	}

}

</code>

<code java>
package chapter18;

import java.io.FileInputStream;
import java.io.IOException;

public class FieInputStreamEx {

	public static void main(String[] args) {
		
		try {
			FileInputStream fis = 
					new FileInputStream("src/chapter17/InputStreamEx.java");
			int data = 0;
			while((data=fis.read()) != -1) {
				System.out.print((char)data);
			}
		} catch (IOException e) {
			
		}

	}

}

</code>
=====문자 기반 입력 스트림=====
<code java>
package chapter18;

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;

public class InputStreamEx2 {

	public static void main(String[] args) {
		
		try {
			// InputStreamReader 객체생성
			Reader in = new InputStreamReader(System.in);
			int data = 0;
			while((data=in.read()) != -1) {
				System.out.print((char)data);
			}
		} catch (IOException e) {
			
		}
		
	}

}

</code>

<code java>
package chapter18;

import java.io.FileInputStream;
import java.io.IOException;

public class FieInputStreamEx3 {

	public static void main(String[] args) {
		
		FileInputStream fis = null;
		try {
			fis = new FileInputStream("src/chapter17/InputStreamEx.java");
			int data = 0;
			byte[] buf = new byte[fis.available()];
			while((data=fis.read(buf, 0, buf.length)) != -1) {
				System.out.print(new String(buf, 0, data));
			}
		} catch (IOException e) {
			
		} finally {
			try {
				fis.close();
			} catch (Exception e) {
				System.out.println(e);
			}
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.FileInputStream;
import java.io.IOException;

public class FieInputStreamEx2 {

	public static void main(String[] args) {
		
		try {
			FileInputStream fis = 
					new FileInputStream("src/chapter17/InputStreamEx.java");
			int data = 0;
			byte[] buf = new byte[fis.available()];
			while((data=fis.read(buf)) != -1) {
				System.out.print(new String(buf, 0, data));
			}
		} catch (IOException e) {
			
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.FileReader;
import java.io.IOException;

public class FileReaderEx {

	public static void main(String[] args) {
		
		FileReader fr = null;
		try {
			fr = new FileReader("src/chapter17/InputStreamEx.java");
			int data = 0;
			while ((data = fr.read()) != -1) {
				System.out.print((char)data);
			}
		} catch (IOException e) {
			
		} finally {
			try {
				fr.close();
			} catch (Exception e) {
				System.out.println(e);
			}
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderEx {

	public static void main(String[] args) {
		
		FileReader fr = null;
		BufferedReader br = null;
		
		try {
			fr = new FileReader("src/chapter17/InputStreamEx.java");
			br = new BufferedReader(fr);
			
			String txt = null;
			while ((txt = br.readLine()) != null) {
				System.out.println(txt);
			}
		} catch (IOException e) {
			
		} finally {
			try {
				fr.close();
				br.close();
			} catch (Exception e) {
				System.out.println(e);
			}
		}

	}

}

</code>

=====바이트 기반 출력 스트림=====

<code java>
package chapter18;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderEx {

	public static void main(String[] args) {
		
		FileReader fr = null;
		BufferedReader br = null;
		
		try {
			fr = new FileReader("src/chapter17/InputStreamEx.java");
			br = new BufferedReader(fr);
			
			String txt = null;
			while ((txt = br.readLine()) != null) {
				System.out.println(txt);
			}
		} catch (IOException e) {
			
		} finally {
			try {
				fr.close();
				br.close();
			} catch (Exception e) {
				System.out.println(e);
			}
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.FileOutputStream;
import java.io.IOException;

public class FieOutputStreamEx2 {

	public static void main(String[] args) {
		
		try {
			FileOutputStream fos = 
					new FileOutputStream("test2.txt", true);
			
			byte[] b = new byte[26];
			byte data = 65;
			for (int i=0; i<b.length; i++) {
				b[i] = data;
				data++;
			}
			fos.write(b);
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;

public class PrintStreamEx {

	public static void main(String[] args) {
		
		try {
			FileOutputStream fos = new FileOutputStream("print.txt", true);
			PrintStream ps = new PrintStream(fos);
			ps.println("홍길동");
			ps.println(1111);
			ps.println(true);
			ps.println(3.14);
			ps.flush();
			ps.close();
			
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
		}

	}

}

</code>
=====문자 기반 출력 스트림=====
<code java>
package chapter18;

import java.io.FileWriter;
import java.io.IOException;

public class FileWriterEx {

	public static void main(String[] args) {
		
		try {
			FileWriter fw = 
					new FileWriter("test3.txt");
			// 문자하나 출력
			fw.write('A');
			char[] buf = {'B','C','D'};
			// 문자배열 출력
			fw.write(buf);
			// 문자배열 off부터 len개수만큼 출력
			fw.write(buf,1,2);
			// 문자열 출력
			fw.write("저는 홍길동입니다.");
			
			fw.flush();
			fw.close();

		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

}

</code>

<code java>
package chapter18;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class BufferedWriterEx {

	public static void main(String[] args) {
		
		try {
			FileWriter fw = 
					new FileWriter("test4.txt");
			BufferedWriter bw = new BufferedWriter(fw);
			
			// 문자하나 출력
			bw.write('A');
			char[] buf = {'B','C','D'};
			// 문자배열 출력
			bw.write(buf);
			// 문자배열 off부터 len개수만큼 출력
			bw.write(buf,1,2);
			// 문자열 출력
			bw.write("저는 홍길동입니다.");
			
			bw.flush();
			bw.close();

		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

}

</code>