Java - More Input and Output

Java module J713

More Input and Output

Exercises, examples and other material relating to training module J713. This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

Formatting to a fixed number of decimal places

One of the questions that I m regularly asked on Java courses is how to format numbers to a certain number of decimal places - Java lacks the printf function ...

http://www.wellho.net/solutions/java-for ... laces.html [longer article]

End of File on a Java BufferedReader

How do you sense if a BufferedReader in Java has reached the end of file? Like so many "things Java" it's easy enough to do ... once you find that vital ...

http://www.wellho.net/mouth/1239_End ... eader.html [short article]

Learning to Program in Java - training course - Writing Java programs for newcomers to programming.

Learning to Program in Java - Writing Java programs for newcomers to programming. This course introduces you to programming in the Java programming language. ...

http://www.wellho.net/course/sjfull.html [course]

Java Programming for the Web - training course - Learn to write server- or client-side applications in Java.

Java Programming for the Web - Learn to write server- or client-side applications in Java. This course introduces you to the Java programming language, ...

http://www.wellho.net/course/jpfull.html [course]

Java Bootcamp - training course - An intense course on Java programming, Servlets and JSPs

Java Bootcamp - An intense course on Java programming, Servlets and JSPs This course introduces you to the Java programming language, and its Internet ...

http://www.wellho.net/course/bjfull.html [course]

Writing to a file

// And print out cards! FileWriter demofile = new FileWriter("abc.123"); for (int k=0;k

http://www.wellho.net/resources/ex.php4?item=j713/snip3 [code sample]

Formatted Printing

// Well House Consultants, 2004. import java.io.*; import java.text.*; /** Formatted printing */ public class bratton { public static void main(String[] ...

http://www.wellho.net/resources/ex.php4?item=j713/bratton.java [code sample]

This module covers reading and writing from and to files, other processes, network connections, keyboards and screens. Also how to find out if an object exists on your file system and if it does, to get more information about it.

This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

Examples from our training material

Javafgrep.java	Example for modification exercise
bratton.java	Formatted Printing
farleigh.java	Checking file status, reading and writing
snip1	Code snippet - reading from a file
snip2	File existence checking
snip3	Writing to a file
wellreader.java	Sample Input class from earlier courses and modules

Background information

This module is available under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

Overview.
The Wellreader class.
Input/output from basics.
Streams.
Writing to a file.
Formatted output.
Reading from a file.

Complete learning

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