Java by API/java.io/ByteArrayInputStream
Содержание
ByteArrayInputStream: available()
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class Main {
public static void main(String args[]) throws IOException {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
String s = "This is a test.";
for (int i = 0; i < s.length(); ++i)
outStream.write(s.charAt(i));
System.out.println("outstream: " + outStream);
System.out.println("size: " + outStream.size());
ByteArrayInputStream inStream = new ByteArrayInputStream(outStream.toByteArray());
int inBytes = inStream.available();
System.out.println("inStream has " + inBytes + " available bytes");
byte inBuf[] = new byte[inBytes];
int bytesRead = inStream.read(inBuf, 0, inBytes);
System.out.println(bytesRead + " bytes were read");
System.out.println("They are: " + new String(inBuf));
}
}
ByteArrayInputStream: read(byte[] b, int off, int len)
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class Main {
public static void main(String args[]) throws IOException {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
String s = "This is a test.";
for (int i = 0; i < s.length(); ++i)
outStream.write(s.charAt(i));
System.out.println("outstream: " + outStream);
System.out.println("size: " + outStream.size());
ByteArrayInputStream inStream = new ByteArrayInputStream(outStream.toByteArray());
int inBytes = inStream.available();
System.out.println("inStream has " + inBytes + " available bytes");
byte inBuf[] = new byte[inBytes];
int bytesRead = inStream.read(inBuf, 0, inBytes);
System.out.println(bytesRead + " bytes were read");
System.out.println("They are: " + new String(inBuf));
}
}
ByteArrayInputStream: reset()
import java.io.ByteArrayInputStream;
import java.io.IOException;
public class Main {
public static void main(String args[]) throws IOException {
String tmp = "abc";
byte b[] = tmp.getBytes();
ByteArrayInputStream in = new ByteArrayInputStream(b);
for (int i = 0; i < 2; i++) {
int c;
while ((c = in.read()) != -1) {
if (i == 0) {
System.out.print((char) c);
} else {
System.out.print(Character.toUpperCase((char) c));
}
}
System.out.println();
in.reset();
}
}
}
new ByteArrayInputStream(byte[] buf)
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.EOFException;
import java.io.IOException;
public class Main {
public static void main(String[] args) throws IOException {
try {
DataInputStream in3 = new DataInputStream(
new ByteArrayInputStream("a dbcde".getBytes()));
while(true)
System.out.print((char)in3.readByte());
} catch(EOFException e) {
System.err.println("End of stream");
}
}
}
new ByteArrayInputStream(byte[] buf, int offset, int length)
import java.io.ByteArrayInputStream;
import java.io.IOException;
public class Main {
public static void main(String args[]) throws IOException {
String tmp = "abcdefghijklmnopqrstuvwxyz";
byte b[] = tmp.getBytes();
ByteArrayInputStream input1 = new ByteArrayInputStream(b);
ByteArrayInputStream input2 = new ByteArrayInputStream(b, 0, 3);
}
}