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Java in a Nutshell

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The java.io Package

24.18 java.io.FileInputStream (JDK 1.0)

This class is a subclass of InputStream that reads bytes from a file specified by name or by a File or FileDescriptor object. read() reads a byte or array of bytes from the file. It returns -1 when the end of file has been reached. To read binary data, you typically use this class in conjunction with a BufferedInputStream and DataInputStream. To read text, you typically use it with an InputStreamReader and BufferedReader. Call close() to close the file when input is no longer needed.

public class FileInputStream extends InputStream {
    // Public Constructors
            public FileInputStream(String name) throws FileNotFoundException;
            public FileInputStream(File file) throws FileNotFoundException;
            public FileInputStream(FileDescriptor fdObj);
    // Public Instance Methods
            public native int available() throws IOException;  // Overrides InputStream
            public native void close() throws IOException;  // Overrides InputStream
            public final FileDescriptor getFD() throws IOException;
            public native int read() throws IOException;  // Defines InputStream
            public int read(byte[] b) throws IOException;  // Overrides InputStream
            public int read(byte[] b, int off, int len) throws IOException;  // Overrides InputStream
            public native long skip(long n) throws IOException;  // Overrides InputStream
    // Protected Instance Methods
            protected void finalize() throws IOException;  // Overrides Object



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