Concurrent & Distributed Computing
PRACTICAL 2 – More Features of Java
You can now use the NETBEANS Development Environment for editing/compiling/running your
programs (You may need to refer to an online NetBeans Tutorial for further information, or you
may wish to download NetBeans from the link https://netbeans.org/downloads/index.html
(download the JavaEE version with Glassfish and Tomcat).
Question 1 - Introduction to NETBEANS
Open the NetBeans Integrated Development Environment (IDE)
To start development:
 Click > File > New Project to display the dialog box below:

Select Java and Application in the Projects section and click Next to display the New Java
Application dialog box, as shown below.

Complete the details regarding the Project Name, Project Location, Create Main Class
(called Project) and click Finish.
The new project is then displayed in the IDE as follows:
As show below, the default creation has produced a MageeProject file with a package called
mageeproject and the specified class called MyHelloClass as shown below.

Develop the “MyHelloClass.java” file as follows:
package mageeproject;
public class MyHelloClass
{
public static void main(String[] args)
{
System.out.println("Hello From Magee!");
}
}
 Build and Run the program
The results should be as follows:
The results are displayed in the lower right window.
Note. You can also Build/Run by right-clicking on the project and selecting from the context
menu.
Congratulations you have run a Java program in NetBeans.
Question 2 – Scanner class
In “MageeProject” create a package called “pract1Q2” and create a class called “TestScanner”
in the “pract1Q2” package and test the program below:
import java.util.Scanner; // Note Using Scanner class
public class TestScanner
{
public static void main(String args[]) throws Exception
{
Scanner scan = new Scanner(System.in);
System.out.print( "Type two integers: " );
int i1 = scan.nextInt(); //reads an integer
int i2 = scan.nextInt(); // reads an integer
System.out.println( "They were " + i1 + " and " + i2 );
System.out.print( "Type two words: " );
String firstWord = scan.next(); //reads a string
String secondWord = scan.next(); // reads a string
System.out.println( "They were " + firstWord + " and " + secondWord );
} // end main
} // end TestScanner
Question 3 – Exception Handling with Input
Create a new project to test the following program:
import java.io.*;
public class Testio {
// method to convert a string representation to equivalent integer value
public static int stringToInt(String s) {
Integer idValue = null;
try {
idValue = new Integer(s);
} catch (NumberFormatException e) {
System.out.println("Exception caught from toInt() : " + e.getMessage());
} // end catch
return idValue;
} // end method stringtoInt
public static void main(String args[]) throws Exception {
// maps the default System.in stream to BufferedReader so readLine is available
BufferedReader cin = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Type two integers with a <return> after each: ");
System.out.flush();
int i1 = stringToInt(cin.readLine());
int i2 = stringToInt(cin.readLine());
System.out.println("The integers were " + i1 + " and " + i2);
System.out.println();
System.out.println("Type two words with a <return> after each: ");
System.out.flush();
String firstWord = cin.readLine();
String secondWord = cin.readLine();
System.out.println("The words were " + firstWord + " and " + secondWord);
} // end main
}
Question 4 – Reading Console Input
Determine the output from the following program:
Question 5 – Reading Strings from the Console
Determine the output from the following program:
Question 6 – InputStream and OutputStream
Determine the output from the following program:
Question 7–Java Exceptions
Determine the output from the following program:
Question 8 –Java Interfaces
Determine the output from the following program:
Question 9 –Using Packages
Determine the output from the following program:
Question 10– Enumeration Interface
Determine the output from the following program:
Question 11 – Vector
Determine the output from the following program:
Question 12 – Lists
Determine the output from the following program:
Question 13– ArrayList
Determine the output from the following program:
Question 14– Generics
Determine the output from the following program:
Note. If you do not fully understand the notation or activity in any of the programs you
should reference a Java textbook or an online Java tutorial to get a better
understanding.
Installation of JavaBeans EE
(Make sure to select the EE version – when installing to can opt to install the Glassfish
and/or Tomcat web servers.)
END