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Java Source | 1997-05-20 | 7.4 KB | 209 lines |
- /*
- * @(#)DataInput.java 1.8 97/01/22
- *
- * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * This software is the confidential and proprietary information of Sun
- * Microsystems, Inc. ("Confidential Information"). You shall not
- * disclose such Confidential Information and shall use it only in
- * accordance with the terms of the license agreement you entered into
- * with Sun.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
- * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
- * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
- * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
- * THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * CopyrightVersion 1.1_beta
- *
- */
-
- package java.io;
-
- /**
- * The data input interface is implemented by streams that can read
- * primitive Java data types from a stream in a machine-independent
- * manner.
- *
- * @author Frank Yellin
- * @version 1.8, 01/22/97
- * @see java.io.DataInputStream
- * @see java.io.DataOutput
- * @since JDK1.0
- */
- public
- interface DataInput {
- /**
- * Reads <code>b.length</code> bytes into the byte array. This
- * method blocks until all the bytes are read.
- *
- * @param b the buffer into which the data is read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- void readFully(byte b[]) throws IOException;
-
- /**
- * Reads <code>b.length</code> bytes into the byte array. This
- * method blocks until all the bytes are read.
- *
- * @param b the buffer into which the data is read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- void readFully(byte b[], int off, int len) throws IOException;
-
- /**
- * Skips exactly <code>n</code> bytes of input.
- *
- * @param n the number of bytes to be skipped.
- * @return the number of bytes skipped, which is always <code>n</code>.
- * @exception EOFException if this stream reaches the end before skipping
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- int skipBytes(int n) throws IOException;
-
- /**
- * Reads a <code>boolean</code> value from the input stream.
- *
- * @return the <code>boolean</code> value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- boolean readBoolean() throws IOException;
-
- /**
- * Reads a signed 8-bit value from the input stream.
- *
- * @return the 8-bit value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- byte readByte() throws IOException;
-
- /**
- * Reads an unsigned 8-bit value from the input stream.
- *
- * @return the unsigned 8-bit value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- int readUnsignedByte() throws IOException;
-
- /**
- * Reads a 16-bit value from the input stream.
- *
- * @return the 16-bit value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- short readShort() throws IOException;
-
- /**
- * Reads an unsigned 16-bit value from the input stream.
- *
- * @return the unsigned 16-bit value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- int readUnsignedShort() throws IOException;
-
- /**
- * Reads a Unicode <code>char</code> value from the input stream.
- *
- * @return the Unicode <code>char</code> read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- char readChar() throws IOException;
-
- /**
- * Reads an <code>int</code> value from the input stream.
- *
- * @return the <code>int</code> value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- int readInt() throws IOException;
-
- /**
- * Reads a <code>long</code> value from the input stream.
- *
- * @return the <code>long</code> value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- long readLong() throws IOException;
-
- /**
- * Reads a <code>float</code> value from the input stream.
- *
- * @return the <code>float</code> value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- float readFloat() throws IOException;
-
- /**
- * Reads a <code>double</code> value from the input stream.
- *
- * @return the <code>double</code> value read.
- * @exception EOFException if this stream reaches the end before reading
- * all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- double readDouble() throws IOException;
-
- /**
- * Reads the next line of text from the input stream.
- *
- * @return if this stream reaches the end before reading all the bytes.
- * @exception IOException if an I/O error occurs.
- * @since JDK1.0
- */
- String readLine() throws IOException;
-
- /**
- * Reads in a string that has been encoded using a modified UTF-8 format.
- * <p>
- * For an exact description of this method, see the discussion in
- * Gosling, Joy, and Steele, <i>The Java Language Specification</i>.
- *
- * @return a Unicode string.
- * @exception EOFException if this stream reaches the end
- * before reading all the bytes.
- * @exception IOException if an I/O error occurs.
- * @exception UTFDataFormatException if the bytes do not represent a
- * valid UTF-8 encoding of a string.
- * @since JDK1.0
- */
- String readUTF() throws IOException;
- }
-