
BufferedReader
maca teks saka aliran simbol, buffering simbol kanggo efisien maca karakter, larik, lan strings. Sampeyan bisa ngliwati ukuran buffer menyang konstruktor minangka argumen kapindho. 
BufferedReader(Reader in) // Creates a buffered stream for reading symbols. It uses the default buffer size.
BufferedReader(Reader in, int sz) // Creates a buffered stream for reading symbols. It uses the specified buffer size.
cara:
close() // Close the stream
mark(int readAheadLimit) // Mark the position in the stream
markSupported() // Indicates whether stream marking is supported
int read() // Read the buffer
int read(char[] cbuf, int off, int len) // Read the buffer
String readLine() // Next line
boolean ready() // Is the stream ready to read?
reset() // Reset the stream
skip(long n) // Skip characters
Mangkene conto nggunakake kelas BufferedReader
lan BufferedWriter
:
Maca file:
import java.io.*;
public class ReadFile {
public static void main(String[] args) {
try {
File file = new File("file.txt");
FileReader fileReader = new FileReader(file); // A stream that connects to the text file
BufferedReader bufferedReader = new BufferedReader(fileReader); // Connect the FileReader to the BufferedReader
String line;
while((line = bufferedReader.readLine()) != null) {
System.out.println(line); // Display the file's contents on the screen, one line at a time
}
bufferedReader.close(); // Close the stream
} catch (Exception e) {
e.printStackTrace();
}
}
}
Kelas Jawa BufferedWriter
nulis teks menyang stream karakter output, buffering karakter supaya efisien nulis karakter, array, lan strings. Sampeyan bisa ngliwati ukuran buffer menyang konstruktor minangka argumen kapindho. Konstruktor:
BufferedWriter(Writer out) // Create a buffered output character stream that uses the default buffer size.
BufferedWriter(Writer out, int sz) // Creates a buffered character output stream that uses a buffer with the specified size.
cara:
close() // Close the stream
flush() // Send the data from the buffer to the Writer
newLine() // Move to a new line
write(char[] cbuf, int off, int len) // Write to the buffer
write(int c) // Write to the buffer
write(String s, int off, int len) // Write to the buffer
Mangkene conto nggunakake Java BufferedReader
lan BufferedWriter
kelas:
Nulis menyang file:
import java.io.*;
public class WriteFile {
public static void main(String[] args) {
String[] list = {"one", "two", "three", "fo"};
try {
File file = new File("file.txt");
FileWriter fileReader = new FileWriter(file); // A stream that connects to the text file
BufferedWriter bufferedWriter = new BufferedWriter(fileReader); // Connect the FileWriter to the BufferedWriter
for (String s : list) {
bufferedWriter.write(s + "\n");
}
bufferedWriter.close (); // Close the stream
} catch (Exception e) {
e.printStackTrace();
}
}
}
FileWriter
langsung nulis data menyang disk. Saben-saben kita ngakses, buffer sing dibungkus bakal nyepetake aplikasi kita. Buffer bakal nulis data internal, lan banjur nulis potongan gedhe saka file menyang disk. Kita maca data saka konsol lan nulis menyang file:
import java.io.*;
class ConsoleRead {
public static void main(String[] args) {
try {
File file = new File("file.txt");
InputStreamReader inputStreamReader = new InputStreamReader(System.in); // A stream for reading from the console
BufferedReader bufferedReader = new BufferedReader(inputStreamReader); // Connect InputStreamReader to a BufferedReader
FileWriter fileReader = new FileWriter(file); // A stream that connects to the text file
BufferedWriter bufferedWriter = new BufferedWriter(fileReader); // Connect the FileWriter to the BufferedWriter
String line;
while(!(line = bufferedReader.readLine()).equals("exit")) {
bufferedWriter.write(line);
}
bufferedReader.close(); // Close the stream
bufferedWriter.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
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