The document discusses Java input/output (I/O) streams. It covers character streams like Reader and Writer, byte streams like InputStream and OutputStream, and file I/O using FileInputStream, FileOutputStream, and RandomAccessFile. Example code is provided to demonstrate reading input from the console, writing to and reading from files, and using seek and getFilePointer methods of RandomAccessFile.

1. 1

2. Input/Output.
java.io

Stream

3. Input Stream:
Output Stream:

4. :
Character Stream
java.io)Readers(
Reader
BufferedReader
FileReader
StringReader

5. Writerjava.io
Writer
PrintWriter
BufferedWriter
FileWriter

6. Byte Stream:
java.ioInput Stream
InputStream
BufferedInputStream
DataInputStream
FileInputStream
StringBufferInputStream

7. Output Streamjava.io
OutputStream
PrintStream
BufferedOutputStream
DataOutputStream
FileOutputStream

8. Consol I/O



9. 
reset(), skip(), mark(), close()
read().


11. read()

InputStream
abstract int read()

int read(byte b][ )


12. int read (byte b[], int off, int len)

byte b][
int off
int len

13. skip
long skip(long n(

long
available
int available)(



14. mark
synchronized void mark(int readlimit(


reset
synchronized void reset)(
mark

15. close
void close)(



16. /InputStream.


17. import java.io.*;
public class InputsSample {
public static void main(String[] args) throws Exception
{
StringBuffer s = new StringBuffer();
char c;
try {
Reader in = new InputStreamReader(System.in);
while ((c = (char) in.read()) != 'n') {
s.append(c);
}
} catch (Exception e) {
System.out.println("Error: " + e.toString());
}
System.out.println(s);
}
}

18. BufferedInputStream

19. import java.io.*;
public class MethalBuffReader {
public static void main(String args[]) {
BufferedReader dtIn = new BufferedReader(new
InputStreamReader(System.in));
char buf[] = new char[20];
try {
dtIn.read(buf, 0, 20);
} catch (Exception e) {
System.out.println("Error: " + e.toString());
}
String s = new String(buf);
System.out.println(s);
}
}

23. import java.io.*;
public class MethalBuffReader {
public static void main(String args[]) throws IOException {
char c;
FileInputStream inFile = new FileInputStream(“test.java");
LineNumberInputStream inLines = new
LineNumberInputStream(inFile);
DataInputStream inStream = new DataInputStream(inLines);
String inputLine;
while ((inputLine = inStream.readLine()) != null) {
System.out.println(inLines.getLineNumber() + ". " +
inputLine);
}
c = (char) System.in.read();
}
}

25. 


26. OUTPUTSTREAM
write
abstract void write(int b(


void write(byte b][ (

void write(byte b[], int off, int len(
3

27. flush
void flush)(
Buffer
close
Void close)(


28. File
 public File(String pathname)

 public File(String pathname, String
filename)

 public File(File Directory, String
filename)


29. FILE
getName((

getPath((

getAbsolutePath((


30. exists((

canRead((

canWrite((


31. isFile()

isDirectory()

lastModified()


32. length()

mkdir()

mkdirs()


33. renameTo()

delete()


34. import java.io.*;
public class printFile {
public static void main (String[] args){
try {
File file = new File ("Main.java");
FileInputStream infile = new
FileInputStream(file);
DataInputStream instream = new
DataInputStream(infile);
String line = "";
while ((line = instream.readLine())!= null)
System.out.println(line);
instream.close();
infile.close();
} catch (Exception e){ }
}
}

35. FileInputStreamFileOutputStream
RandomAccessFile


36. RandomAccessFile
RandomAccessFile
public RandomAccessFile(String filename,
String mode)
r,rw
public RandomAccessFile(File filename, String
mode)
r,rw.

37. RandomAccessFileFileInputStream
FileOutputStreamseek()getFilePointer().
getFilePointer()
public long getFilePointer()

seek()
public void seek(long filePostion)
long

38. import java.io.*;
public class RanInform {
public static void main(String args[]) throws
IOException {
char c,k;
RandomAccessFile file = new
RandomAccessFile("RandomFileTest.txt","rw");
file.writeBoolean(true);
file.writeInt(123456);
file.writeChar('j');
file.writeDouble(1234.56);
file.seek(1);
System.out.println(file.readInt());
System.out.println(file.readChar());
System.out.println(file.readDouble());
file.seek(0);
System.out.println(file.readBoolean());
file.close();
k = (char)System.in.read();
}}