Int to string to string array

Sorry, if my question is too wordy.
First, the problem -- I am reading integers into my application and converting the those into strings using valueOf(). I then need to use those strings in a switch statment. The only way I could figure how to do this was to use the same String variable in each switch statement but change the the message to fit each case. My professor suggested I use an array list instead.
Second, the question -- how can I convert the String I have generated into a String Array and use the indexing of the array to correspond to the specific text for each case?
Thank you.

indeed, you can't use the switch mechanism on strings.
but, if the requirement is that you convert an integer into a string and then switch on those (I don't know why...) from an array of the values, swap the String value back into an int and switch from there.

Similar Messages

How to convert an int array to string array?

Hi,
Can anyone please help me with this question?
int number={4,6,45,3,2,77};
I like to convert this into a list and sort
List mylist = Arrays.asList(number);
Collections.sort(mylist);
But first I need to convert the int array to String array.
Please advise. Thanks.

If you want to convert your int array to a String array, you have no choice but doing a conversion element by element in a for loop.
However, if the sort method doesn't behave as desired, you can use the one with 2 parameters, the second parameter being a comparator class.
Check the javadoc for more information : http://java.sun.com/j2se/1.3/docs/api/java/util/Collections.html
/Stephane

How to convert String array into int.

void getSoldSms(Vector vecSoldSms)
     String str[]=new String[vecSoldSms.size()];
     String words[]=new String[str.length]; // String array
          for(int i=0;i< vecSoldSms.size();i++)
               str=(String)vecSoldSms.get(i);
          }               //End for
          for(int i=0;i<str.length;i++)
          words = str[i].split("\\|\\|");
          System.out.println();
          for(int j=0;j<1;j++)
          int count[str.length]=Integer.parseInt(words[i]);
          System.out.print(count[j]*advance_count);
          } // end inner for loop
          }          //End for
     }          //End function getSoldSms
how do i convert words which is a string array into int type. i kno string can be converted into int using interger.parseint. but wat abt string arrays??? plz help me out with the above code.

i did tht its still giving the same errorFor Heaven's sake, what about taking a second to try to understand the code you're copying first? If you really can't fix the error yourself, you have a more serious problem than just convertingStrings to ints.
And if you want { "1", "2", "3" } to be 123:
StringBuffer b = new StringBuffer();
for (int i = 0; i < array.length; i++) {
b.append(array);
int result = Integer.parseIn(b.toString());

Problems with string array, please help!

I have a String array floor[][], it has 20 rows and columns
After I do some statement to modify it, I print this array
out in JTextArea, why the output be like this?
null* null....
null null...
null null...
How to correct it?

a turtle graphics applet:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TG extends JApplet implements ActionListener {
private int x, y;
private int pendown, command, movement;
String direction, output, temp;
JLabel l1;
JTextField tf1;
JTextArea ta1;
String floor[][] = new String[20][20];;
public void init()
    x = 0;
    y = 0;
    pendown = 0;
    direction = "r";
    Container c = getContentPane();
    c.setLayout( new FlowLayout() );
       l1 = new JLabel( "Please type a command:" );
       c.add( l1 );
       tf1 = new JTextField(20);
       tf1.addActionListener( this );
       c.add( tf1 );
       ta1 = new JTextArea(20,20);
       ta1.setEditable( false );
       c.add( ta1 );
public void actionPerformed( ActionEvent e )
       temp = tf1.getText();
       if( temp.length() > 1)
       command = Integer.parseInt(temp.substring(0,1));
       movement = Integer.parseInt(temp.substring(2,temp.length()));
       else
       command = Integer.parseInt(temp);
       switch(command)
            case 1:
            pendown=0;
            break;
            case 2:
            pendown=1;
            break;
            case 3:
            direct("r");
            break;
            case 4:
            direct("l");
            break;
            case 5:
           move(movement);
            break;
            case 6:
            print();
            break;
public void direct(String s)
     if(direction == "r" && s =="r")
        direction = "d";
     else if(direction == "r" && s =="l")
        direction = "u";
     else if(direction == "l" && s =="r")
        direction = "u";
     else if(direction == "l" && s =="l")
        direction = "d";
     else if(direction == "u" && s =="r")
        direction = "r";
     else if(direction == "u" && s =="l")
        direction = "l";
     else if(direction == "d" && s =="r")
        direction = "l";
     else if(direction == "d" && s =="l")
        direction = "r";
public void move(int movement)
     if(pendown == 1)
          if(direction == "u")
          for(int b=0;b<movement;b++)
               floor[x][y+b] = "*";
          else if(direction == "d")
          for(int b=0;b<movement;b++)
               floor[x][y-b] = "*";
          else if(direction == "l")
          for(int b=0;b<movement;b++)
               floor[x-b][y] = "*";
          else if(direction == "r")
          for(int b=0;b<movement;b++)
               floor[x+b][y] = "*";
      else if(pendown == 0)
           if(direction == "u")
          for(int b=0;b<movement;b++)
               floor[x][y+b] = "-";
          else if(direction == "d")
          for(int b=0;b<movement;b++)
               floor[x][y-b] = "-";
          else if(direction == "l")
          for(int b=0;b<movement;b++)
               floor[x-b][y] = "-";
          else if(direction == "r")
          for(int b=0;b<movement;b++)
               floor[x+b][y] = "-";
      public void print()
     for(int row=0;row<20;row++)
       for( int column=0;column<20;column++)
            output += floor[row][column];
            if(column == 19)
             output+="\n";
        ta1.setText(output);
}

Problems with string arrays

Previous task was:
Write a class "QuestionAnalyser" which has a method "turnAnswerToScore". This method takes a String parameter and returns an int. The int returned depends upon the parameter:
parameter score
"A" 1
"B" 2
"C" 3
other 0
Alright, here's the recent task:
Write another method "turnAnswersToScore". This method takes an array of Strings as a parameter, works out the numerical score for each array entry, and adds the scores up, returning the total.
That's my code:
class QuestionAnalyser{
public static int Score;
public String[] Answer;
public static void main(String[] args) {}
     public int turnAnswerToScore(String[] Answer)
for (int i = 0; i < Answer.length;i++) {
if (Answer.equals("A")) {
Score = Score + 1; }
else if (Answer[i].equals("B")) {
Score = Score + 2;}
else if (Answer[i].equals("C")) {
Score = Score + 3;}
else {
Score = Score + 0;}
return Score;
this is the error message I get:
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
QATest2.java:15: cannot resolve symbol
symbol : method turnAnswersToScore (java.lang.String[])
location: class QuestionAnalyser
if(qa.turnAnswersToScore(task)!=total){
^
What went wrong?
Suggestions would be greatly appreciated!

If I declare int score in the method i get this message
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
./QuestionAnalyser.java:20: variable score might not have been initialized
score++; }
^
./QuestionAnalyser.java:23: variable score might not have been initialized
score++;
^
./QuestionAnalyser.java:27: variable score might not have been initialized
score++;
^
./QuestionAnalyser.java:34: variable score might not have been initialized
return score;
^
4 errors
----------Sorry expected answer was-------------------------------
The method turnAnswersToScore is working OK - well done!
----------Your answer however was---------------------------------
Exception in thread "main" java.lang.NoClassDefFoundError: QuestionAnalyser
     at QATest2.main(QATest2.java:4)
This is the message I get from the submission page, but trying to compile it I get the same messages.
The code looks like this, then
class QuestionAnalyser{
String[] answer;
public static void main(String[] args) {}
     public int turnAnswersToScore(String[] answer)
int score;
for (int i = 0; i < answer.length; i++) {
if (answer.equals("A")) {
score++; }
else if (answer[i].equals("B")) {
score++;
score++; }
else if (answer[i].equals("C")) {
score++;
score++;
score++; }
else {}
return score;
When I leave 'public int score;' where it was before (right after the class declaration below the declaration of the string array) I get this but it compiles normally.
The results of trying to compile your submission and run it against a set of test data was as follows:
----------Compilation output--------------------------------------
javac QATest2.java
----------Sorry expected answer was-------------------------------
The method turnAnswersToScore is working OK - well done!
----------Your answer however was---------------------------------
wrong answer in turnAnswersToScore for
BDCAADDCA
Alright, even university students need to sleep :-)
Good night.

Remove null values from string array

Hi ,
I have a string array in a jsp page which I save some values inside. After I store the values I want to print only those who are not null. How can I do this? Is there a way to delete the null values?

Thank you but because I am new in programming what do you mean to use continue. Can you explain it a little bit further?<%
//go through the array to check all the values
for(int i=0; i<array.length();i++) {
//If array is null, nothing happen
if(array==null){
//leave here blank; instead use continue like:
//this will skip the statements next to it, and increments the value of i in for loop and continues to execute the body of for loop.
//The same will be repeated till the last iteration.
continue;
//If array not null, then print value in a new line
else{
out.print(array+"<br>"); //don't change the logic here
%>

Exporting a String Array to an HTML file

Hey everyone..I'm currently making lots of progress in my project...but right now I've been trying to make a button that exports my search results to an html file...basically what I've made is a search engine to search webcrawler files...
The result list I get (which is actually a string array), I want to export to html so I can open that html file and find all the links that were found in the search I made..What I have so far is this, but it's not working yet, any help? :
    private class exportListener implements ActionListener
        public void actionPerformed(ActionEvent e)
            String[] result = parent.getResult();
            if(result == null)
                return;
            JFileChooser chooser = new JFileChooser();
            chooser.setAcceptAllFileFilterUsed(false);
            chooser.setFileFilter(new HtmlFileFilter());
            chooser.setDialogType(JFileChooser.SAVE_DIALOG);
            int returnVal = chooser.showSaveDialog(parent);
            if(returnVal == JFileChooser.CANCEL_OPTION)
                return;
            File fl = chooser.getSelectedFile();
            String path = fl.getPath() + ".html";
            searchIF.exportResultAsHtml(path);
            System.out.println(path);
    private class HtmlFileFilter extends FileFilter
        public String getDescription(){return "Html";}
        public boolean accept(File pathname)
            String name = pathname.getPath();
            //Just checking to see if the filename ends with html.
            if (name.toLowerCase().substring(name.lastIndexOf('.') + 1).equals("html"))
                return true;
            return false;
        }

Actually..nevermind, sorry.

Getting lenght of String array

Hi,
How can i find the lenght of a string array, i have used length method to calculate length of single string value,e.g
String value = "test"
int length = value.length()
Now i want to calculate length of a string array.e.g
String csv_values = "test,by,random"
String[] str = csv_values.split(",")
int lenght = str.length()
As you can see i want to calculate total number of entries in an array after i split it dynamically.
Currently it is giving me exception, "Unable to parse exception; Undefined method: length for class: [Ljava.lang.String]"
Thanks

This is a tricky one. An Array has a length property, unlike a String which has a length method.
So...
int length = str.length
Anthony Holloway
Please use the star ratings to help drive great content to the top of searches.

Help with comparing string array with parameters

I've posted my code in full so hopefully everyone can see exactly what I have been doing.
Note - my code uses the observer/observable model. The method I am having the problem with the if statement is in the class HSBC.
Basically when the pin count reaches 4 (in the atm class) it sends the userid & pincode) over to the checkPinAndUserId(String pinCode, String userCode) method. Here the if statement should check the userid to see if the string parameter matches a string in the array. If it does it should check in the same position in the pin array to check the pin no is correct and then return true.
* @(#)BankAssignment.java 1.0 03/04/06
* This apllication l
package myprojects.bankassignment;
import java.awt.*; // import the component library
import java.awt.event.*; // import the evnet library
import javax.swing.*;
import java.util.*;
class Correct1v16 extends Frame // make a new application
     public Correct1v16() // this is the constructor method
          HSBC HSBCobj = new HSBC();
     public static void main(String args[]) // this invokes the constructor of the class and creates a runable object 'mainframe'
          Correct1v16 mainFrame = new Correct1v16(); // the constructor call of the class which creates an object of that class
class HSBC implements Observer, ActionListener
          Frame f5;
          JLabel refill, launch;
          TextField tRefill, tLaunch;
          JButton refillbut, launchbut;
          int count;
          String [] userId=new String [10];
          String [] pin=new String [10];
          public boolean authenticate = false;
          int i;
               public HSBC()
               drawFrame();
               Atm Atmobj = new Atm(this);
               System.out.println("Starting HSBC constructor");
          public void drawFrame()
               System.out.println("Start HSBC drawframe method...");
               f5=new Frame("HSBC");
               f5.setLayout(new FlowLayout());
               f5.setSize(200, 200);
               f5.addWindowListener(new WindowAdapter()
                    public void windowClosing(WindowEvent e)
                         f5.dispose();
                         System.exit(0);
               refill=new JLabel("Refill ATM");
               launch=new JLabel("Launch new ATM");
               tRefill=new TextField(20);
               tLaunch=new TextField(10);
               refillbut=new JButton("Refill ATM");
               refillbut.addActionListener(this);
               launchbut=new JButton("Launch new ATM");
               launchbut.addActionListener(this);
               f5.add(refill);
               f5.add(tRefill);
               f5.add(refillbut);
               f5.add(launch);
               f5.add(tLaunch);
               f5.add(launchbut);
               f5.setVisible(true);
//*********** POPULATE THE ARRAYS     */
               pin[0]="1234";
               pin[1]="2345";
               pin[2]="3456";
               pin[3]="4567";
               pin[4]="5678";
               pin[5]="6789";
               pin[6]="7890";
               pin[7]="8901";
               pin[8]="9012";
               pin[9]="0123";
               userId[0]="0";
               userId[1]="1";
               userId[2]="2";
               userId[3]="3";
               userId[4]="4";
               userId[5]="5";
               userId[6]="6";
               userId[7]="7";
               userId[8]="8";
               userId[9]="9";
          }// end drawframe method
          //     public Atm atmLink = (Atm)o;
               public void update(Observable gm1, Object o)
                    Atm atmLink = (Atm)o;
                    tRefill.setText("Refill ATM ?");
                    atmLink.refill();
               }//end update method
               public void actionPerformed(ActionEvent ae)
                    if(ae.getSource() == refillbut)
//                         Atm Atmobj.refill();
                    //     tRefill.setText("text area");
                    //     atmLink.refill();
//                         Atmobj.refill();
//                         setChanged();
//                         notifyObservers();
                    if(ae.getSource() == launchbut)
                         tLaunch.setText("new ATM opened");
                         Atm Atmobj1 = new Atm(this);
//******** THIS METHOD RECEIVES THE PARAMETERS FROM THE ATM METHOD (LINE 580) (PINCODE AND USERCODE) BUT
//******** IT ONLY THE ARRAY CALLED USERID (WHICH HOLDS THE USER CODE MATCHES ONE OF THE USERID'S)
//******** I DO WANT IT TO DO THIS BUT I ALSO WANT IT TO MOVE ON AND CHECK THE PINCODE WITH THE PIN ARRAY)
//******** IF THEY ARE BOTH TRUE I WANT IT TO RETURN TRUE - ELSE FALSE.          */
               public boolean checkPinAndUserId(String userCode, String pinCode)
                    boolean found = false;
                    System.out.println("in checkpin method");
                    System.out.println("userCode = "+ userCode);
                    System.out.println("pinCode = " + pinCode);
                    for (int i = 0; i < userId.length; i++)
                    System.out.println("in the userid array" + userId);
                         if (userCode.equals(userId[i]))
                              System.out.println("checking user code array");
                              if (pinCode.equals(pin[i]))
                                   System.out.println("checking the pin array" + pinCode);
                                   System.out.println("pin[i] = "+pin[i]);
                              found = true;
                    return found;
     }// end HSBC class
class Atm extends Observable implements ActionListener
          Frame f1;
          TextField t3, t5;
          JTextArea display = new JTextArea("Welcome to HSBC Bank. \n Please enter your User Identification number \n", 5, 40);
          JPanel p1, p2, p3,p4;
          private JButton but1, but2, but3, but4,but5,but6,but7,but8,but9,but0,enter,
          cancel,fivepounds,tenpounds,twentypounds,fiftypounds,clearbut, refillbut;
          int state = 1;
          public String pinCode ="";
          public      String userCode ="";
          int userCodeCount = 0;
          int PINCount = 0;
          String withdrawAmount = "";
          int atmBalance =200;
          private HSBC HSBCobj;
          //ATM constructor that receives the HSBCobj g1 reference to where the HSBC class
          // in in the program
          // Calls the drawATMFrame method
          // add the observer to the HSBCobj reference so that the ATM can tell HSBC that
          // something has changed
          public Atm(HSBC g1)
               HSBCobj = g1;
               drawATMFrame();
               System.out.println("Starting Atm constructor");
               addObserver(HSBCobj);
          // this is the method that draws the ATM interface
          // also apply the Border Layout to the frame
          public void drawATMFrame()
               f1=new Frame("ATM");
               f1.setLayout(new BorderLayout());
               f1.setSize(350, 250);
               f1.addWindowListener(new WindowAdapter()
                    public void windowClosing(WindowEvent e)
                         f1.dispose();
                         System.exit(0);
               // declare & instantiate all the buttons that will be used on the ATM
               but1 =new JButton("1");
               but1.addActionListener(this);
               but2 =new JButton("2");
               but2.addActionListener(this);
               but3 =new JButton("3");
               but3.addActionListener(this);
               but4 =new JButton("4");
               but4.addActionListener(this);
               but5 =new JButton("5");
               but5.addActionListener(this);
               but6 =new JButton("6");
               but6.addActionListener(this);
               but7 =new JButton("7");
               but7.addActionListener(this);
               but8 =new JButton("8");
               but8.addActionListener(this);
               but9 =new JButton("9");
               but9.addActionListener(this);
               but0 =new JButton("0");
               but0.addActionListener(this);
               enter=new JButton("Enter");
               enter.addActionListener(this);
               cancel=new JButton("Cancel/ \n Restart");
               cancel.addActionListener(this);
               fivepounds =new JButton("?5");
               fivepounds.addActionListener(this);
               tenpounds = new JButton("?10");
               tenpounds.addActionListener(this);
               twentypounds = new JButton("?20");
               twentypounds.addActionListener(this);
               fiftypounds = new JButton("?50");
               fiftypounds.addActionListener(this);
               clearbut = new JButton("Clear");
               clearbut.addActionListener(this);
               refillbut = new JButton("Refill");
               refillbut.addActionListener(this);
               //declare & instantiate a textfield
               t3=new TextField(5);
               // instantiate 4 JPanels
               p1=new JPanel();
               p2=new JPanel();
               p3=new JPanel();
               p4=new JPanel();
               // add some buttons to p1
               p1.add(but1);
               p1.add(but2);
               p1.add(but3);
               p1.add(but4);
               p1.add(but5);
               p1.add(but6);
               p1.add(but7);
               p1.add(but8);
               p1.add(but9);
               p1.add(but0);
               //add the text area field to p2
               p2.add(display);
               // apply the grid layout to p3
               GridLayout layout3 = new GridLayout(4,1,5,5);
               p3.setLayout(layout3);
               p3.add(fivepounds);
               p3.add(tenpounds);
               p3.add(twentypounds);
               p3.add(fiftypounds);
               // apply grid layout to p4
               GridLayout layout4 = new GridLayout(4,1,5, 5);
               p4.setLayout(layout4);
               p4.add(clearbut);
               p4.add(enter);
               p4.add(cancel);
               p4.add(refillbut);
               //add the panels to the different parts of the screen
               f1.add("North", display);
               f1.add("Center", p1);
               f1.add("East", p4);
               f1.add("West", p3);
               f1.setVisible(true);
          }// end drawATMframe method
     public void actionPerformed(ActionEvent ae)
               if(state == 1)
                         getUserIdNo(ae);
          else     if(state == 2)
                         doPINInput(ae);
                    else
                         withdrawCash(ae);
     }// end action performed method
//******** STATE 1 events*/
//******** USER ID INPUT*/
          public void getUserIdNo (ActionEvent ae)
               if (ae.getSource() == but1)
                    display.append("*");
                    userCode = userCode + "1";
                    userCodeCount++;
               if (ae.getSource() == but2)
                    display.append("*");
                    userCode = userCode + "2";
                    userCodeCount++;
               if (ae.getSource() == but3)
                    display.append("*");
                    userCode = userCode + "3";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but4)
                    display.append("*");
                    userCode = userCode = "4";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but5)
                    display.append("*");
                    userCode = userCode + "5";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but6)
                    display.append("*");
                    userCode = userCode + "6";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but7)
                    display.append("*");
                    userCode = userCode + "7";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but8)
                    display.append("*");
                    userCode = userCode + "8";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but9)
                    display.append("*");
                    userCode = userCode + "9";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == but0)
                    display.append("*");
                    userCode = userCode + "0";
                    userCodeCount++;
                    System.out.println("user id ="+userCode);
               if (ae.getSource() == cancel)
                    display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                    userCode = "";
                    state = 2;
               if (ae.getSource() == clearbut)
                    display.setText("Please enter your user ID number again\n");
                    userCode = "";
                    userCodeCount = 0;
               if (ae.getSource() == refillbut)
                    refill();
               if (ae.getSource() == enter)
                    display.setText("Please enter your PIN \n");
                    state = 2;
                    System.out.println(" User id enter button = " + userCode);
               if (userCodeCount == 1)
                    display.setText("Please enter your PIN \n");
                    //userCode = "";
                    userCodeCount = 0;
                    state = 2;
//******** STATE 2               */
//******** PIN INPUT*/
               public void doPINInput(ActionEvent ae)
                    if (ae.getSource() == but1)
                         {      pinCode = pinCode.concat("1");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but2)
                         {      pinCode = pinCode.concat("2");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but3)
                         {      pinCode = pinCode.concat("3");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but4)
                         {      pinCode = pinCode.concat("4");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but5)
                         {      pinCode = pinCode.concat("5");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but6)
                         {      pinCode = pinCode.concat("6");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but7)
                         {      pinCode = pinCode.concat("7");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but8)
                         {      pinCode = pinCode.concat("8");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but9)
                         {      pinCode = pinCode.concat("9");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == but0)
                         {      pinCode = pinCode.concat("0");
                              display.append("*");
                              PINCount++;
                    if (ae.getSource() == clearbut)
                              display.setText("Please enter your PIN number again \n");
                              pinCode = "";
                              PINCount = 0;
                    if (ae.getSource() == cancel)
                              display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                         state = 1;
                              pinCode ="";
                              PINCount = 0;
                    if (ae.getSource() == refillbut)
                              refill();
/// ************************ THIS BUTTON SENDS THE PIN & USER CODE OVER TO THE MAIN BANK*/
/// ************************ (LINE 152)               */
                    if (ae.getSource() == enter)
//                         if(HSBCobj.checkPinAndUserId(pinCode, userCode))
//                              display.setText("How much would you like to withdraw \n");
//                    else
//                         display.setText("Your UserId and Pin code do not match");
                    if(PINCount ==4)
                    if(HSBCobj.checkPinAndUserId(userCode,pinCode))
                              display.setText("Enter the amount you \n want to withdraw \n ?");
                              PINCount=0;
                    else
                    display.setText("Your User Identification Number \n and PIN number do not match! \n please try again\n");
//*********** STATE 3 events*/
//*********** withdrawCash*/
     public void withdrawCash(ActionEvent ae)
//               if (ae.getSource() == but1)
//                    display.append("1");
///                    withdrawAmount = withdrawAmount+1;
     //               pinCode = pinCode.concat("2");
     //               System.out.println("Withdrawal Amount = "+withdrawAmount);
               if(ae.getSource( ) == but1)
                    withdrawAmount = withdrawAmount + "1";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but2)
                    withdrawAmount = withdrawAmount + "2";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but3)
                    withdrawAmount = withdrawAmount + "3";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but4)
                    withdrawAmount = withdrawAmount + "4";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but5)
                    withdrawAmount = withdrawAmount + "5";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but6)
                    withdrawAmount = withdrawAmount + "6";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but7)
                    withdrawAmount = withdrawAmount + "7";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but8)
                    withdrawAmount = withdrawAmount + "8";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but9)
                    withdrawAmount = withdrawAmount + "9";
                    display.setText(withdrawAmount);
               if(ae.getSource( ) == but0)
                    withdrawAmount = withdrawAmount + "0";
                    display.setText(withdrawAmount);
               if (ae.getSource() == fivepounds)
                    withdrawAmount = withdrawAmount + "5";
                    display.setText(withdrawAmount);
                    atmBalance();
               if (ae.getSource() == tenpounds)
                    withdrawAmount = withdrawAmount + "10";
                    display.setText(withdrawAmount);
                    atmBalance();
               if (ae.getSource() == twentypounds)
                    withdrawAmount = withdrawAmount + "20";
                    display.setText(withdrawAmount);
                    atmBalance();
               if (ae.getSource() == fiftypounds)
                    withdrawAmount = withdrawAmount + "50";
                    display.setText(withdrawAmount);
                    atmBalance();
     //          if (ae.getSource() == tenpounds)
     //               display.append("10");
     //               withdrawAmount = 10;
     //               pinCode = pinCode.concat("2");
     //               System.out.println("10 pound button pressed");
     //               atmBalance();
               if (ae.getSource() == enter)
                    atmBalance();
               if (ae.getSource() == refillbut)
                    System.out.println("refill but pressed");
                    refill();
               if (ae.getSource() == clearbut)
                    System.out.println("clear but pressed");
                    display.setText("Enter the amount you want to withdraw \n ?");
                    withdrawAmount="";
               if (ae.getSource() == cancel)
                    display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                    withdrawAmount="";
               pinCode ="";
                    PINCount = 0;
                    userCode = "";
                    userCodeCount = 0;
                    state = 1;
     }// end withdraw cash input method
     // checks balace of atm and withdraws cash. Also notifies onserver if atm balance is low
          public void atmBalance()
               String s = withdrawAmount;
               int n = Integer.parseInt(s);
               if ( atmBalance >= n)
                    atmBalance = atmBalance - n;
                    System.out.println("atm balance = "+ atmBalance);
                    display.setText("Thankyou for using HSBC. \nYou have withdrawn ?"+n);
                    if     (atmBalance<40)
                         System.out.println("atm balance is less than 40 - notify HSBC" );
                         setChanged();
                         notifyObservers(this);
                         /// note the refil should send a message to the controller
                         // advising a refil is needed. The Bank will send an engineer
                         // out who will fill the atm up
          }// end atmBalance method
          /// note the refil should send a message to the controller
          /// then th coontroller will send a message to this method to fill machine
          /// (this is simulating a clerk filling atm)
               public void refill()
                    System.out.println("in refill method" );
                    atmBalance = 200;
                    System.out.println("Atm has been refilled. Atm balance = " + atmBalance);
               //     setChanged();
               //     notifyObservers(this);
               }// end refill method
// NOTE SURE ABOUT THIS - DO I USE THE UPDATE METHOD TO NOTIFY HSBC THAT ATM REQUIRES FILLING
// THIS IS THE WRONG PART OF THE PROGRAM (SHOULD BE IN HSBC) - IGNORE
               public void update(Observable gm1, Object gameObj)
                    display.setText("Congratulations");
               }//end update method
     }// end Atm method
}// end Assignment2 clas
[\code]

I wasn't trying to annoy anyone at all.
I'm new to java and have been told that using the observer/observable model is not considered basic java. So that is the only reason I posted it in this section. At the same time i feel that the bit I'm struggling with is actually basic - hence posting it in the basic section. I'm not sure if people of all abilities check all forums or just the ones they feel at at their standard.
So appologies if you've taken offence.

Newbie trying to sort 2D string array

Dear all,
After read some book chapters, web sites including this, I still don't get the point.
If I have a file like,
1 aaa 213 0.9
3 cbb 514 0.1
2 abc 219 1.3
9 bbc 417 10.4
8 dee 887 2.1
9 bba 111 7.1
and I load into memory as a String[][]
here comes the problem, I sort by column 1 (aaa,...,bba) using an adaptation of the Quicksort algorithm for 2D arrays
* Sort for a 2D String array
* @param a an String 2D array
* @param column column to be sort
public static void sort(String[][] a, int column) throws Exception {
QuickSort(a, 0, a.length - 1, column);
/** Sort elements using QuickSort algorithm
static void QuickSort(String[][] a, int lo0, int hi0, int column) throws Exception {
int lo = lo0;
int hi = hi0;
int mid;
String mitad;
if ( hi0 > lo0) {
/* Arbitrarily establishing partition element as the midpoint of
* the array.
mid = ( lo0 + hi0 ) / 2 ;
mitad = a[mid][column];
// loop through the array until indices cross
while( lo <= hi ) {
/* find the first element that is greater than or equal to
* the partition element starting from the left Index.
while( ( lo < hi0 ) && ( a[lo][column].compareTo(mitad)<0))
++lo;
/* find an element that is smaller than or equal to
* the partition element starting from the right Index.
while( ( hi > lo0 ) && ( a[hi][column].compareTo(mitad)>0))
--hi;
// if the indexes have not crossed, swap
if( lo <= hi )
swap(a, lo, hi);
++lo;
--hi;
/* If the right index has not reached the left side of array
* must now sort the left partition.
if( lo0 < hi )
QuickSort( a, lo0, hi, column );
/* If the left index has not reached the right side of array
* must now sort the right partition.
if( lo < hi0 )
QuickSort( a, lo, hi0, column );
* swap 2D String column
private static void swap(String[][] array, int k1, int k2){
String[] temp = array[k1];
array[k1] = array[k2];
array[k2] = temp;
----- end of the code --------
if I call this from the main module like this
import MyUtil.*;
public class kaka
public static void main(String[] args) throws Exception
String[][]a = MyUtil.fileToArray("array.txt");
MyMatrix.printf(a);
System.out.println("");
MyMatrix.sort(a,1);
MyMatrix.printf(a);
System.out.println("");
MyMatrix.sort(a,3);
MyMatrix.printf(a);
for the first sorting I get
1 aaa 213 0.9
2 abc 219 1.3
9 bba 111 7.1
9 bbc 417 10.4
3 cbb 514 0.1
8 dee 887 2.1
(lexicographic)
but for the second one (column 3) I get
3 cbb 514 0.1
1 aaa 213 0.9
2 abc 219 1.3
9 bbc 417 10.4
8 dee 887 2.1
9 bba 111 7.1
this is not the order I want to apply to this sorting, I would like to create my own one. but or I can't or I don't know how to use a comparator on this case.
I don't know if I am rediscovering the wheel with my (Sort String[][], but I think that has be an easy way to sort arrays of arrays better than this one.
I've been trying to understand the Question of the week 106 (http://developer.java.sun.com/developer/qow/archive/106/) that sounds similar, and perfect for my case. But I don't know how to pass my arrays values to the class Fred().
Any help will be deeply appreciated
Thanks for your help and your attention
Pedro

public class StringArrayComparator implements Comparator {
int sortColumn = 0;
public int setSortColumn(c) { sortColumn = c; }
public int compareTo(Object o1, Object o2) {
    if (o1 == null && o2 == null)
      return 0;
    if (o1 == null)
      return -1;
    if (o2 == null)
      return 1;
    String[] s1 = (String[])o1;
    String[] s2 = (String[])o2;
    // I assume the elements at position sortColumn is
    // not null nor out of bounds.
    return s1[sortColumn].compareTo(s2[sortColumn]);
// Then you can use this to sort the 2D array:
Comparator comparator = new StringArrayComparator();
comparator.setSortColumn(0); // sort by first column
String[][] array = ...
Arrays.sort(array, comparator);I haven't tested the code, so there might be some compiler errors, or an error in the logic.

Number of repeated characters in string array

Hi,
I m trying to get number of repeated characters in string array. I couldnt figure out where am i doing mistake.
thank you,
For example: count({"alpha, beta,"}, 'a')
a is repeated 3
l is repeated 1 etc.
public class Test
public static int count(String[] stringArray, char c)
public String [] str = new String [2];
int count = 0;
str[0]
str[1]
for(int i = 0; i<str.length(); i++)
if (str.charAt(i)
count++;
return count;

There is a difference between a String and a String [].
A String [] is an array of String class objects:/* Traverse_Array_Of_Strings_1.java */
public class Traverse_Array_Of_Strings_1
public static void main(String [] argv)
    /* here is an array of Strings */
    String [] s = { "hello", "how", "are", "you" };
    int i, j;
    System.out.println("s.length = "+ s.length );
    for (i= 0; i < s.length; i++)
      System.out.println("s= <"+ s[i] +">");
      for (j= 0; j < s.length(); j++)
System.out.print(s[i].charAt(j) +", ");
System.out.println("\n-----");
}output:java> javac Traverse_Array_Of_Strings_1.java
java> java Traverse_Array_Of_Strings_1
s.length = 4
s= <hello>
h, e, l, l, o,
s= <how>
h, o, w,
s= <are>
a, r, e,
s= <you>
y, o, u,
Edited by: vim_no1 on Jul 15, 2010 7:43 AM

External java function that should return String array

Hi everyone,
I have a split function in plsql that takes 10 times longer a java tokenizer function that i was written. So, i want to use java external function to split my plsql strings into pieces.
I can write a java external procedure that returns types like int, float and String types. I have no problem about it.
My problem is returning an array of strings. I found a book that has an example about how can we get directory list in plsql with java external procedure.
(code)
import java.io.File;
import java.sql.*;
import oracle.sql.*;
import oracle.jdbc.*;
public class JFile {
public static oracle.sql.ARRAY dirlist (String dir)
throws java.sql.SQLException
Connection conn = new OracleDriver().defaultConnection( );
ArrayDescriptor arraydesc =
ArrayDescriptor.createDescriptor ("DIRLIST_T", conn);
File myDir = new File (dir);
String[] filesList = myDir.list( );
ARRAY dirArray = new ARRAY(arraydesc, conn, filesList);
return dirArray;
CREATE OR REPLACE FUNCTION dirlist (dir IN VARCHAR2)
RETURN dirlist_t
AS
LANGUAGE JAVA
NAME 'myFile.dirlist(java.lang.String) return oracle.sql.ARRARY';
(code)
I could compile this source file in localhost but not remotehost. There are jar files ( import oracle.sql.*; import oracle.jdbc.*; ) that should be added to remote classpath. ( others have already added java classpath ). But, which classpath i should add? Oracle has own JVM and Classpath, probably i should upload these jar files to oracle classpath. Am i wrong? How can i do? Can you explain in detail? How can i return string array from java external function in Oracle ?
I am using Oracle 11.1.0.7 on Solaris Sparc Machine.

Hi,
What do you mean "compile in remote host"
Aren't you using the loadjava tool? - that should be enough, the RDBMS already "has" the jars needed.
[A must read|http://download.oracle.com/docs/cd/B28359_01/java.111/b31225/chone.htm#BABCFIIF]
Regards
Peter

Finding the no of occurences of a string in a string array

hi
I have a string array which contains different strings say
for eg date
[21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 21/08/2008, 22/08/2008, 22/08/2008, 22/08/2008, 22/08/2008, 22/08/2008] etc.
for eg names
[coverage, search, search, combined-search, documentService, expand-term, id-mapping, citation, class, corporate-tree, document-update, coverage, coverage, search, search, combined-search, documentService, expand-term, id-mapping, citation, class, corporate-tree, document-update, coverage]
i need to find out the count of a particular date or name in the string array.
Also i will not be knowing what is the value that will be present in that string array.
the values are dynamic. please help to solve this.
thanks in advance
Mohan

In the same way use for date,names and other as required by you..sample code for nameimport java.io.*;
public class Test {
     public static void main(String args[]) throws Exception{
         int cnt=0;
               String name[]={"coverage","abc","def","coverage", "search", "search"};
          BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
          System.out.println("enter name");
          String rv=br.readLine();
     for(int i=0;i<name.length;i++){
          if(rv.equals(name)){
               cnt++;
System.out.println("Name occured "+cnt+" times");

Covert String Array to String

Hey,
I have this code that take a string
EX:
Straw? No, too stupid a fad, I put soot on warts
and takes out the "?" and "," and places a space in their spot, then tokenizes the string so now all the spaces are gone (right?) then places the tokenized string into and array. Now I want that array into a string.
Pretty much what I want to go from is
this:
Straw? No, too stupid a fad, I put soot on warts
to:
StrawNotoostupidafadIputsootonwarts
here is my code
import java.util.*;
public class TrivialApplication {
     public static void main(String args[])
          System.out.println( "Hello World!\n" );
          String hello = "Straw? No, too stupid a fad, I put soot on warts";
          hello = hello.replace('?',' ');
          hello = hello.replace(',',' ');
          StringTokenizer tokenizer = new StringTokenizer(hello);
          String[] array = new String[hello.length()];
          System.out.println(tokenizer.countTokens());
          System.out.println(hello.length());
          int count = tokenizer.countTokens();
          int x = 0;
          while(tokenizer.hasMoreTokens())
               array[x] = tokenizer.nextToken();
               x++;
}

Sweet thanks man here is the finished code. I took out the array because it was now not needed.
import java.util.*;
public class TrivialApplication {
     public static void main(String args[])
          System.out.println( "Hello World!\n" );
          String hello = "Straw? No, too stupid a fad, I put soot on warts";
          System.out.println(hello + "\n");
          hello = hello.replace('?',' ');
          hello = hello.replace(',',' ');
          StringTokenizer tokenizer = new StringTokenizer(hello);
          StringBuffer buffer = new StringBuffer();
          int count = tokenizer.countTokens();
          while(tokenizer.hasMoreTokens())
               buffer = buffer.append(tokenizer.nextToken());
          hello = buffer.toString();
          System.out.println("New String with changes \n");
          System.out.println(hello);
[\code]

Trying to setText on random JPanels via a String array?

My assignment is to create a bunch of JButtons, and randomly have an "X" appear on one, until it is clicked, and then it goes away and reappears on another random one. It does this ten times and displays the time it took to do so.
I've created all the JButtons, named b01 to b48 and put them in a gridLayout. That part works fine.
I created a String[] array with the 48 names of the JButtons in it, then I was thinking I could go this route...
Random r = new Random();
String random = panels[r.nextInt(panels.length)];
random.setText("X"); //This is where the program hangs up.I can replace the setText statement with a System.out.println statement, and it shows up on the console correctly...

Brandon,
Have a chook at my minesweeper game at http://forum.java.sun.com/thread.jspa?forumID=54&threadID=5248903 ... it uses a matrix of cells[rows][cols]... each Cell is a JPanel which contains a Button.
I think you'll end up with something like ...
// create an array of Buttons
Button buttons[] = Button[NUM_BUTTONS];
for (int i=0; i<NUM_BUTTONS; i++) {
buttons[] = new Button(i);
// Xify a random button for a random time
buttons[random.nextInt(NUM_BUTTONS)].xify()I'd create a:
class Button extends JButton
* provides a constructor(int index) which sizes and places the button according to it's index
* provides an "xify" method, which setText("X"), then sets-up a SwingTimer to setText(null) after a random time.
Cheers. Keith.

Int to string to string array

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