chn.util
Class SimpleIO

java.lang.Object
  |
  +--chn.util.SimpleIO

Direct Known Subclasses:

ConsoleIO, FileInput

public class SimpleIO

extends java.lang.Object

Field Summary

protected java.lang.String	delimiters
protected java.io.BufferedReader	in
protected java.util.StringTokenizer	tokens

Constructor Summary

SimpleIO()
Constructs the SimpleIO object with default delimiters, space, tab, formfeed.

SimpleIO(java.lang.String delims)
Constructs the ConsoleIO object with given delimiters.

Method Summary

boolean	readBoolean() Reads and returns the next boolean from the current line.
double	readDouble() Reads and returns the next double from the current line.
int	readInt() Reads and returns the next integer from the current line.
java.lang.String	readLine() Flushes any remaining tokens on the current input line, then reads the next full line input as a String and returns it.
java.lang.String	readToken() Reads and returns the next token from the current line.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

in

protected java.io.BufferedReader in

tokens

protected java.util.StringTokenizer tokens

delimiters

protected java.lang.String delimiters

Constructor Detail

SimpleIO

public SimpleIO()

Constructs the SimpleIO object with default delimiters, space, tab, formfeed. Newline and return characters terminate the input of the current line.

SimpleIO

public SimpleIO(java.lang.String delims)

Constructs the ConsoleIO object with given delimiters. Newline and return characters terminate the input of the current line.

Method Detail

readToken

public java.lang.String readToken()

Reads and returns the next token from the current line. A token is a String of characters separated by the specified delimiters. If the current input line has no more unread tokens, reads the first token from the first non-empty line entered.

Returns:

the next String token from input, as determined by delimiters

readInt

public int readInt()

Reads and returns the next integer from the current line. If the current input line has no more unread tokens, reads the first token from the first non-empty line entered. If the next token is not the correct format for an integer, then a error message is printed and the program terminates.

Returns:

next integer from input

readDouble

public double readDouble()

Reads and returns the next double from the current line. If the current input line has no more unread tokens, reads the first token from the first non-empty line entered. If the next token is not the correct format for a double, then a error message is printed and the program terminates.

Returns:

the next double from input

readBoolean

public boolean readBoolean()

Reads and returns the next boolean from the current line. If the current input line has no more unread tokens, reads the first token from the first non-empty line entered. A valid boolean is any token. The value true is returned if the token is "true", with upper or lower case letters, otherwise false is returned.

Returns:

the next boolean from input

readLine

public java.lang.String readLine()

Flushes any remaining tokens on the current input line, then reads the next full line input as a String and returns it.

Returns:

next line read as a String