Java FilterInputStream.read(byte[] b, int off, int len)方法範例
FilterInputStream.read(byte[] b, int off, int len)
方法具有以下語法。
public int read(byte[] b, int off, int len) throws IOException
在下面的程式碼中展示了如何使用FilterInputStream.read(byte[] b, int off, int len)
方法。
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FilterInputStream;
import java.io.InputStream;
// By: WW W.Y I i Ba i .c o m
public class Main {
public static void main(String[] args) throws Exception {
byte[] buffer = new byte[6];
InputStream is = new FileInputStream("C://test.txt");
FilterInputStream fis = new BufferedInputStream(is);
// returns number of bytes read to buffer
int i = fis.read(buffer, 2, 4);
System.out.println("Number of bytes read: " + i);
// for each byte in buffer
for (byte b : buffer) {
// converts byte to character
char c = (char) b;
// if byte is null
if (b == 0){
c = '-';
}
System.out.println("Char read from buffer b: " + c);
}
}
}