JAVA (NPRG013) LABS 2012/2013 Jaroslav Keznikl, [email protected].
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Transcript of JAVA (NPRG013) LABS 2012/2013 Jaroslav Keznikl, [email protected].
Jaroslav Keznikl, [email protected]
BASIC INFORMATION
Course website http://d3s.mff.cuni.cz/~hnetynka/index.cgi/teaching/java
“Grupík” module in SIS
Jaroslav Keznikl, [email protected]
CREDIT CONDITIONS Attendance (max 3 absences)
Elsewise an extra homework
One obligatory homework
Final “project” Topic due at Nov. 14th 2012 Finalized preferably till the end of February
Hard deadline May 24th 2013 12:00 (end of summer semester)
Final test
Details on the course website
Jaroslav Keznikl, [email protected]
GUIDELINES
Basic Java info package = a directory with a particular structure,
containing source files classpath = list of directories, where to look for
packages -cp, CLASSPATH environment variable
public static void main(String args) { … } System.exit(int retval) System.out.println(…)
print(…), printf(…)
Jaroslav Keznikl, [email protected]
GUIDELINES 2 Basic shell commands (bash, …)
man – manual pages mkdir – create a directory
-p creates also the non-existing parent directories cd – change directory ls [-a, -l] – list directory contents rm [-r-f] – delete a file/directory [recursively] export CLASSPATH = “…”
Sets the CLASSPATH environment variable
Unix at MS home vs home/BIG
cp –r .gnome BIG/.gnome ln –s BIG/.gnome
Editor vim/gvim, gedit (Gnome), kwrite (KDE), …
Java tools java – runtime javac – compiler
Jaroslav Keznikl, [email protected]
GUIDELINES 3Basic procedure
// create a directory structure for the project & package
mkdir -p project/src/cz/cuni/mff/keznikl
// implement stuff
gvim project/src/cz/cuni/mff/keznikl/Test.java
// compile (creates Test.class)
javac project/src/cz/cuni/mff/keznikl/Test.java
// run it
java –cp project/src cz.cuni.mff.Test
Implementation
package cz.cuni.mff.keznikl;
public class Test {
public static void main(String[] args) { ... }
}
Jaroslav Keznikl, [email protected]
ASSIGNMENT 1
Program Hello World Use your own package (not the default=“” one)
Jaroslav Keznikl, [email protected]
ASSIGNMENT 2 An application that uses a class from a different project/package
2 projects hello, library src directory for source files
/…/home/…/projects/hello/src/ /…/home/…/projects/library/src/
Project library package: org.company.library contains class Printer
static method print(String msg)
Project hello package: cz.cuni.mff.example method main Prints “Hello world” using the Printer class
Jaroslav Keznikl, [email protected]
ASSIGNMENT 3,4
Assignment 3 Create a program, which prints out all its arguments
from the command line.
Assignment 4 Create a program, which prints out a multiplication
table for numbers 1-10
