Where to put the class?

Question

Ok EasyIn class can help me convert a string into an int, I will need it for this problem.
The code for EasyIn is as follows, and i need to put it into my AirplaneListTester class, but where do I put it?
EasyIn class
// EasyIn.java
import java.io.*;
public abstract class EasyIn
static String s = new String();
static byte[] b = new byte[512];
static int bytesRead = 0;
public static String getString()
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
s=s.trim();
ok = true;
catch(IOException e)
System.out.println(e.getMessage());
     return s;
public static int getInt()
int i = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
i = Integer.parseInt(s.trim());
ok = true;
catch(NumberFormatException e)
System.out.println("Make sure you enter an integer");
catch(IOException e)
System.out.println(e.getMessage());
return i;
public static byte getByte()
byte i = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
i = Byte.parseByte(s.trim());
ok = true;
catch(NumberFormatException e)
System.out.println("Make sure you enter a byte");
catch(IOException e)
System.out.println(e.getMessage());
return i;
public static short getShort()
short i = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
i = Short.parseShort(s.trim());
ok = true;
catch(NumberFormatException e)
System.out.println("Make sure you enter a short integer");
catch(IOException e)
System.out.println(e.getMessage());
return i;
public static long getLong()
long l = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
l = Long.parseLong(s.trim());
ok = true;
catch(NumberFormatException e)
System.out.println("Make surre you enter a long integer");
catch(IOException e)
System.out.println(e.getMessage());
return l;
public static double getDouble()
double d = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
d = (Double.valueOf(s.trim())).doubleValue();
ok = true;
catch(NumberFormatException e)
System.out.println("Make sure you enter a decimal number");
catch(IOException e)
System.out.println(e.getMessage());
return d;
public static float getFloat()
float f = 0;
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
f = (Float.valueOf(s.trim())).floatValue();
ok = true;
catch(NumberFormatException e)
System.out.println("Make sure you enter a decimal number");
catch(IOException e)
System.out.println(e.getMessage());
     return f;
public static char getChar()
char c = ' ';
boolean ok = false;
while(!ok)
try
bytesRead = System.in.read(b);
s = new String(b,0,bytesRead-1);
if(s.trim().length()!=1)
System.out.println("Make sure you enter a single character");
else
c = s.trim().charAt(0);
ok = true;
catch(IOException e)
System.out.println(e.getMessage());
return c;
public static void pause()
boolean ok = false;
while(!ok)
try
System.in.read(b);
ok = true;
catch(IOException e)
System.out.println(e.getMessage());
public static void pause(String messageIn)
boolean ok = false;
while(!ok)
try
System.out.print(messageIn);
System.in.read(b);
ok = true;
catch(IOException e)
System.out.println(e.getMessage());
AirplaneListTester class sorry for the indentations the message box has messed it up
import javax.swing.JOptionPane; //indicates that the compiler should load class JOptionPane for use in this application.
public class AirplaneListTester
     public static class AirplaneList
          //Attributes for the AirplaneList
          private String flight = "No plane" ; //Airplane's name
          private int total = 0;     //initial total
          private boolean Empty = true; //initially the list is empty
          private boolean     Full = false; //The list initially has no entries therefore it is not full
          // Constructor method
          public AirplaneList()
               total = 0;
          public void add(String Airplane) // allows the user to add an airplane to the list, it returns a boolean value
               flight = Airplane; // The airplane object will be "flight"
          }     //add()
          public void remove(int inti) // allows the user to remove an airplane from the list, it returns a boolean value
               total = inti;
          }     //remove()
          public boolean isEmpty() // allows a user to check if the list is empty
               Empty = true;
               Full = false;
               return Empty;
          public boolean isFull() // allows a user to check if the list is full
               Empty = false;
               Full = true;
               return Full;
          public void item(int inti) // returns the airplane's flight number on the list
               total = inti;
               System.out.println(flight+ "is number ");
               System.out.println(total+ "");
          public void Total() // returns the total number of airplanes on the list
               JOptionPane.showMessageDialog(null,total+ " Airplanes are on the list" );
               if (isFull())
               JOptionPane.showMessageDialog(null,"The list has also reached its maximum number of planes" );
          public void getInt()
          //Start main()
               public static void main (String[] args)
          throws java.io.IOException
               char choice; //Words choice and size are the names of variables
               int size; //This declaration specifies that the variable are of data type char and int
               //size = EasyIn.getInt(); // Converts a string and makes it an Int
               Char - a variable that may only hold a single lowercase letter, a single uppercase letter, a single digit or a           
               special character (such as x, $, 7 and *)
               AirplaneList plane = new AirplaneList(); // Declare AirplaneList variables
               //The code below creates a dialog box for the user to input a choice
               String inputcode;
               inputcode = JOptionPane.showInputDialog("A: add an airplane from the list\n" +
                              "B: remove an airplane from the list\n" +
                              "C: check if the list is empty\n" +
                              "D: check if the list is full\n" +
                              "E: display the list\n" +
                              "F: quit\n" );
               The null first argument indicates that the message dialog will appear in the center of the screen. The 2nd is the      
               message to display
               do
                         // get choice from user
                         choice = inputcode.toUpperCase().charAt(0);
                         //process menu options
                         switch(choice)
                    case 'A':               
                         addingplanes(plane); // Adds a plane to the list
                         break;     //done processing case
                    case 'B':
                         removingplanes(plane); // Removes the plane
                         break;     //done processing case
                    case 'C':
                         islistempty(plane); // Checks if plane is empty
                         break;     //done processing case
                    case 'D':
                         islistfull(plane); // Checks if plane is full
                         break;     //done processing case
                    case 'E':
                         displaylist(plane);      // Displays the list of planes
                         break;     //done processing case
                    case 'F':
                         JOptionPane.showMessageDialog(null, "You have chosen to quit the program");
                         break;     //done processing case          // Quits the program
                    default:
                         JOptionPane.showMessageDialog(null, "Invalid entry!, Please choose another option");
                         if (choice!= 'A'||
               choice!= 'B'||      
                         choice!= 'C'||
                    choice!= 'D'||
                    choice!= 'E'||
                    choice!= 'F');
                         inputcode = JOptionPane.showInputDialog("A: add an airplane from the list\n" +
                              "B: remove an airplane from the list\n" +
                              "C: check if the list is empty\n" +
                              "D: check if the list is full\n" +
                              "E: display the list\n" +
                              "F: quit\n" );
                              break;     //done processing case
               }while (choice!= 'F' ); //end AirplaneList tester
          System.exit(0); //end main()
               //add Airplane
               public static void addingplanes(AirplaneList plane)
                    String flight;
               flight = JOptionPane.showInputDialog("Please enter airplane filght number" );
                    create an Airplane object to add to list          Airplane flight = new Airplane();
                    add string to list if the list is not full
                    access the 'add(Airplane)' method from the AirplaneList class;
               if the list is full, return a statement to the user indicating that no more plane can be added onto the list
               //remove airplane
               public static void removingplanes(AirplaneList plane)
               //get position of item
               /*     string enterpos;
                    enterpos = JOptionPane.showInputDialog("Please enter position to remove" );
                    System.out.print(":")
                    int plane = Easyln.getint();
                    // delete item if it exists
                    //access the 'remove(Airplane)' method from the AirplaneList class;
                    //if the user enter an invalid number for the position, returen a statement
               */     //indicating that there is no such posititon.
               //check if empty
               public static void islistempty(AirplaneList plane)
                    String inputcode;
                    if (plane.isEmpty())
                    JOptionPane.showMessageDialog(null, "The list is empty");
                    else
                    JOptionPane.showMessageDialog(null, "list is not empty" );
               //check if full
               public static void islistfull(AirplaneList plane)
                    String inputcode;
                    if (plane.isFull())
                    JOptionPane.showMessageDialog(null, "list is full" );
                    else
                    JOptionPane.showMessageDialog(null, "list is not full" );
               //display list
               public static void displaylist(AirplaneList plane)
                    if (plane.isEmpty())     //no need to display if list is empty
                    JOptionPane.showMessageDialog(null, "list is empty, there is no list to display!" );
                    else
                    plane.Total();
                    //loop through list
}//Ends the AirplaneListTester class

Answer 1

First of all we have some code formatting options in this board.
If you wrap your code in [[b]code] it will be a whole lot easier to read for all of us.
Next put your class into a library path since you're going to use it in more than one project I guess.
Then simply import your class in the project you're currently working on and you can use it's methods.