TextInputFile

java.lang.Object
- hsa.TextInputFile

public class TextInputFile
extends java.lang.Object

Field Summary

Fields
Modifier and Type	Field and Description
`protected boolean`	`closed` Set if the file has been closed.
`protected static int`	`EMPTY` Constants and variables used by the input line buffer.
`protected boolean`	`eofFlag` The end-of-file flag
`protected java.io.BufferedReader`	`f` Stream used for reading input.
`protected java.lang.String`	`fileName` The file name.
`protected java.lang.String`	`lineBuffer`
`protected boolean`	`useStandardIO` Indicator whether to write to standard output or a file.

Constructor Summary

Constructors
Constructor and Description
`TextInputFile()` Contructor - TextInputFile to read from standard input.
`TextInputFile(java.io.File file)` Contructor - TextInputFile to read from a File.
`TextInputFile(java.lang.String fileName)` Contructor - TextInputFile to read from file with specified name.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()` Close the file to further reading.
`boolean`	`eof()` Return whether there is an eof before the next token.
`protected void`	`pushACharacter(char ch)` Place the character in the unread position.
`protected char`	`readACharacter()` Read a single character from the file.
`protected char`	`readACharacterThrowsEOF()` Read a single character from the file.
`protected void`	`readALineFromFile()` Reads a line from the file.
`protected java.lang.String`	`readAToken()` Reads in input from the keyboard buffer until it hits a whitespace, which indicates the end of a token.
`boolean`	`readBoolean()` Read a boolean from the file.
`byte`	`readByte()` Read an 8-bit integer (a "byte") from the file.
`char`	`readChar()` Read a single character from the file.
`double`	`readDouble()` Read a double precision floating point number (a "double") from the file.
`float`	`readFloat()` Read a floating point number (a "float") from the file.
`int`	`readInt()` Read a 32-bit integer (an "int") from the file.
`java.lang.String`	`readLine()` Read a full line of text from the file.
`long`	`readLong()` Read a 64-bit integer (a "long") from the file.
`short`	`readShort()` Read a 16-bit integer (a "short") from the file.
`java.lang.String`	`readString()` Read a whitespace delimited token from the file.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - fileName
```
protected java.lang.String fileName
```
    The file name.
  - f
```
protected java.io.BufferedReader f
```
    Stream used for reading input.
  - closed
```
protected boolean closed
```
    Set if the file has been closed.
  - useStandardIO
```
protected boolean useStandardIO
```
    Indicator whether to write to standard output or a file.
  - eofFlag
```
protected boolean eofFlag
```
    The end-of-file flag
  - EMPTY
```
protected static final int EMPTY
```
    Constants and variables used by the input line buffer.
    
    See Also:
    
    Constant Field Values
  - lineBuffer
```
protected java.lang.String lineBuffer
```
- Constructor Detail
  - TextInputFile
```
public TextInputFile()
```
    Contructor - TextInputFile to read from standard input.
  - TextInputFile
```
public TextInputFile(java.io.File file)
```
    Contructor - TextInputFile to read from a File.
    
    Parameters:
    
    file - - File to be opened.
  - TextInputFile
```
public TextInputFile(java.lang.String fileName)
```
    Contructor - TextInputFile to read from file with specified name.
    
    Parameters:
    
    fileName - - Name of the file to be opened.
- Method Detail
  - close
```
public void close()
```
    Close the file to further reading.
  - eof
```
public boolean eof()
```
    Return whether there is an eof before the next token.
    
    Returns:
    
    Whether there is an eof before the next token
  - pushACharacter
```
protected void pushACharacter(char ch)
```
    Place the character in the unread position. The next time a character is read, this one will be returned.
    
    Parameters:
    
    ch - - The character to be pushed into the unread position.
  - readACharacter
```
protected char readACharacter()
```
    Read a single character from the file. If we reach EOF before reading the character, display an error message and exit.
    
    Returns:
    
    The character read from the file.
  - readACharacterThrowsEOF
```
protected char readACharacterThrowsEOF()
                                throws java.io.EOFException
```
    Read a single character from the file.
    
    Returns:
    
    The character read from the file.
    
    Throws:
    
    java.io.EOFException - - Thrown if attempt to read past EOF.
  - readALineFromFile
```
protected void readALineFromFile()
                          throws java.io.EOFException
```
    Reads a line from the file.
    
    Throws:
    
    java.io.EOFException - - Thrown if attempt to read past EOF.
  - readAToken
```
protected java.lang.String readAToken()
```
    Reads in input from the keyboard buffer until it hits a whitespace, which indicates the end of a token.
  - readBoolean
```
public boolean readBoolean()
```
    Read a boolean from the file. The actual text in the file must be either "true" or "false" although case is irrelvant.
    
    Returns:
    
    The boolean value read from the file.
  - readByte
```
public byte readByte()
```
    Read an 8-bit integer (a "byte") from the file. The actual text in the file must be a number from -128 to 127.
    
    Returns:
    
    The byte value read from the file.
  - readChar
```
public char readChar()
```
    Read a single character from the file. Note that this discards any whitespace. If you want to get every character on the line, use the readLine () method.
    
    Returns:
    
    The character read from the file.
  - readDouble
```
public double readDouble()
```
    Read a double precision floating point number (a "double") from the file.
    
    Returns:
    
    The double value read from the file.
  - readFloat
```
public float readFloat()
```
    Read a floating point number (a "float") from the file.
    
    Returns:
    
    The float value read from the file.
  - readInt
```
public int readInt()
```
    Read a 32-bit integer (an "int") from the file. The actual text in the file must be a number from -2147483648 to 2147483647.
    
    Returns:
    
    The int value read from the file.
  - readLine
```
public java.lang.String readLine()
```
    Read a full line of text from the file.
    
    Returns:
    
    The line of text read from the file.
  - readLong
```
public long readLong()
```
    Read a 64-bit integer (a "long") from the file.
    
    Returns:
    
    The long value read from the file.
  - readShort
```
public short readShort()
```
    Read a 16-bit integer (a "short") from the file. The actual text in the file must be a number from -32768 to 32767.
    
    Returns:
    
    The short value read from the file.
  - readString
```
public java.lang.String readString()
```
    Read a whitespace delimited token from the file.
    
    Returns:
    
    The token read from the file.

Class TextInputFile

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

fileName

f

closed

useStandardIO

eofFlag

EMPTY

lineBuffer

Constructor Detail

TextInputFile

TextInputFile

TextInputFile

Method Detail

close

eof

pushACharacter

readACharacter

readACharacterThrowsEOF

readALineFromFile

readAToken

readBoolean

readByte

readChar

readDouble

readFloat

readInt

readLine

readLong

readShort

readString