Problem with getState() method in Thread class
Can anyone find out the problem with the given getState() method:
System.out.println("The state of Thread 1: "+aThread.getState());
The Error message is as follows:
threadDemo.java:42: cannot resolve symbol
symbol : method getState ()
location: class incrementThread
System.out.println("The state of Thread 1: "+aThread.getState())
^
1 error
the api doc shows Since: 1.5
You do use Java 5...if not... it's not available.
Similar Messages
-
Problem with skip() method of Scanner class
public static void main(String args[]){
try{
String regEx = "had";
String parseString = "Smith, wherer Jones had had \'had \'";
//System.out.println(parseString);
Pattern pat=Pattern.compile(regEx);
Matcher matcher = pat.matcher(regEx);
Scanner scan=new Scanner(parseString);
if(matcher.find()){
System.out.println("Pattern found!");
scan.skip(pat);
System.out.println("Pattern");
System.out.println(parseString);
catch(NoSuchElementException e){}
After this line program is not working,
scan.skip(pat);
suggest me in using the skip() method.
Please suggest me on this,its very urgent.
Thanks,
Valaboju.
Edited by: praveenmca09 on Mar 13, 2008 5:51 AMNot Working means what. Are u getting some error or u r not getting proper output.
very little info.
i think the problem is with
scan.skip(pat);
it returns Scanner object
And ur not handling it -
Hi, I am having this problem:
I made a CustomItem, a TextField, now I overloaded the traverse method, so if the keycode is Canvas.UP or Canvas.DOWN then return false else return true.
The problem is that when I press the left or rigth button it also returns false and not true.
and there is another problem with traverse, before returning false or true I set a boolean and call to repaint to draw it on some way if its selected or not, the paint method is being called but it just dont draw as desired.
protected void paint(Graphics g, int ancho, int alto) {
System.out.println ("Dentro del paint, seleccionado="+seleccionado);
try {
g.drawString(label, 0, 0, Graphics.TOP|Graphics.LEFT);
if (!seleccionado) {
g.setColor(120, 120, 120);
g.drawRect(0, 4, tama�oTexto+8, 25);
if (seleccionado) {
g.setColor(255, 255, 255);
g.fillRect(1, 5, (tama�oTexto+8-1), 23);
g.setColor(0, 0, 0);
if (!seleccionado) {
g.setColor(80, 80, 80);
g.drawString(texto, 4, 7, Graphics.TOP|Graphics.LEFT);
if (seleccionado) {
int cursorX=Font.getDefaultFont().charsWidth((texto.substring(0, idLetraActual)).toCharArray(), 0, texto.substring(0, idLetraActual).length())+4;
g.drawChar('|', cursorX, 7, Graphics.TOP|Graphics.LEFT);
} catch (Exception E){
E.printStackTrace();
}the traverse method set the seleccionado variable and calls to repaint but instead of being false the paint method is drawing it as true (most of times).I have a problem with findByxxx() method.. in
Container managed bean.
i have
Collection collection =
home.findByOwnerName("fieldValue");
specified in my Client Program, where ownerName is the
cmp fieldname..
and
public Collection findByOwnerName(String ownerName)
throws RemoteException, FinderException
defined in my home interface.
i have not mentioned the findBy() method anywhere else
(Bean class). You have to describe the query in the deployment descriptor.
>
Even if i have a same "fieldValue" in the database
(Oracle), which i specified in findBy() method, iam a
result of owner Not found, which is not the case as i
have that owner name.
for the same application if i use findByPrimaryKey(),
it is working..
Can any one please post me the solution. -
Problem with WindowClosing() method
Hello everyone,
I have some problem with WindowClosing() method, in which I gave options
to quit or not. Quit is working fine but in case of Cancel, its not returning to
the frame. Can anyone help me ....Here is my code
import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
public class TestFrame extends JPanel
public static void main(String[] args)
JFrame frame = new JFrame("Frame3");
WindowListener l = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
int button = JOptionPane.showConfirmDialog(null,"OK to Quit","",JOptionPane.YES_NO_OPTION, -1);
if(button == 0) {
System.exit(0);
else
return;
frame.addWindowListener(l);
frame.setSize(1200,950);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}Maybe try
int button = JOptionPane.showConfirmDialog(yourframe,"OK to
Quit","",JOptionPane.YES_NO_OPTION, -1); -
I have problem with pay method
I have problem with pay method. My card declined. I change card and I have the same problem. What can i do? Why declined my card again?
Contact iTunes store support: https://ssl.apple.com/emea/support/itunes/contact.html.
-
Hi,
I have a problem with the method prerender. A month ago, I started to develop a web project using Sun Studio Creator and a few page beans that i used extended the Abstract Page Bean, so I overrided the prerender and customized it.
The problem is that, now i'm using eclipse and the configuration files of the project has changed and the prerender method never execute.
I want to know why it is happening. Maybe the project is "bad-configurated"?
ThanksThe code of java bean doesn't change, the only thing that has changed is the configuration files (faces-config.xml, web.xml, etc).
I put a breakpoint in the prerender method but the lifecycle doesn�t execute this method.
After serveral changes, I wrote this code in the method prerender :
int i=0;
i = 1;
And the prerender method doesn't execute.
I'm a bit lost,
thanks -
Problem with affinetransformOp method...
I have a serious problem with filter method
I Want to make a image flipping or some other filtering by using
AffineTransformOp
but it printouts an erro like this
cannot resolve symbol
op.filter (img, flipped)
(the error pointer shows ".after the op")
a code from my one of the filters
BufferedImage flipped = new BufferedImage(img.getHeight(), img.getWidth(),BufferedImage.TYPE_INT_RGB);
AffineTransform trans = new AffineTransform(0, 1, 1, 0, 0, 0);
AffineTransformOp op = new AffineTransformOp(trans, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
op.filter(img, flipped); //img is my buffered image source
I used some other ways like (img, null) but always give out error.
thanks..Did you declare "img" as BufferedImage or something else?
What is the full error message? -
Hello, I'm new in java development, and I'm french with a student English, sorry if that I say is strange is the expressions.
I have a problem with network streams and serialization.
I want to establish a connection between 2 apps, on 2 different computers. For the development, the tests are local (IP : 127.0.0.1)
The problem : I send 4 bytes and I flush after, and I receive 6 bytes. To know what is transmitting on the connection, I override the OutputStream class.
I think that the flush() method produces 2 bytes but i don't think how.
I put you the codes follow :
Thanks for any help.
The sender function :
// This function is called when the user want to send data to another user.
// This piece of function establishing the connection between 2 users.
public int startListeningForNFT(String senderUserName, int indexOfSender) {
System.out.println(senderUserName + " demande à " + this.userName + " de démarrer la procédure de réception.");
/* Cette fonction est l'interface ente le serveur et le client2,
* elle retourne le port et l'IP que le client2 le lui a renvoyé. */
/* This function send an Integer which will trig a reception function in the receiver
This function is called in a Thread. */
try {
this.oos.writeObject(44);
this.oos.flush();
System.out.println("On a bien envoyé OBJ2AskerInfos sur le port " + portToListen);
byte b = this.ois.readByte();
System.out.println("Byte = " + b);
b = this.ois.readByte();
System.out.println("Byte = " + b);
b = this.ois.readByte();
System.out.println("Byte = " + b);
b = this.ois.readByte();
System.out.println("Byte = " + b);
b = this.ois.readByte();
System.out.println("Byte = " + b);
catch (IOException e) { e.printStackTrace(); }
return Constantes.PORT_DATA;
}The receiver function :
public class ClientClient implements WindowClient {
// This 3 attributes are initalized correctly.
private Socket comSocket;
private String comPort;
private String userName;
public ClientClient() {
try {
comSocket = new Socket(ipToJoin, Integer.parseInt(comPort));
oos = new ObjectOutputStream(new DebugOutputStream(comSocket.getOutputStream()));
ois = new ObjectInputStream(comSocket.getInputStream());
oos.writeObject(userName);
oos.flush();
ThreadInputListener til = new ThreadInputListener();
til.start();
catch (UnknownHostException e) { e.printStackTrace(); }
catch (ClassNotFoundException e) { e.printStackTrace(); }
catch (IOException e) {
e.printStackTrace();
JOptionPane.showMessageDialog(null, ("Auncun serveur n'a été trouvé sur l'adresse indiquée :\n" + ipToJoin), "Erreur", JOptionPane.ERROR_MESSAGE);
public class ThreadInputListener extends Thread {
@SuppressWarnings("unchecked")
public void run() {
try {
while(true) {
Object receivedObject = ois.readObject();
// Si l'objet reçu est un OBJ2InfosOnAsker => Renvoyer le port.
// If received Object is an integer
if(receivedObject instanceof Integer) {
System.out.println(userName +" a bien reçu l'objet OBJ2InfosOnAsker...");
System.out.println(userName +" a bien reçu int." + receivedObject);
System.out.println("On lance les 4 int :");
// Send 4 bytes to the sender (control bytes, just for solve the problem)
oos.writeByte(7);
oos.writeByte(8);
oos.writeByte(9);
oos.writeByte(10);
oos.flush();
System.out.println("...et a bien envoyé le port");
catch (IOException e) {
// ArrayList<HostClient> temp = new ArrayList<HostClient>();
// temp.add(new HostFictiveClient(userName));
// fenetreprincipale.updateClientList(temp);
fenetreprincipale.addDiscution("Vous avez été déconnecté du serveur.");
catch (ClassNotFoundException e) { e.printStackTrace(); }
}The override function of OutputStream :
public class DebugOutputStream extends OutputStream {
private OutputStream os;
public DebugOutputStream(OutputStream os) {
super();
this.os = os;
@Override
public void write(int b) throws IOException {
System.out.println("ClientClient envoie " + b + " soit " + ((char)b));
os.write(b);
}The sender function says :
Host demande à User1 de démarrer la procédure de réception.
On a bien envoyé OBJ2AskerInfos sur le port 3001
Byte = 4
Byte = 0
Byte = 7
Byte = 8
Byte = 9And the receiver function says :
User1 a bien reçu l'objet OBJ2InfosOnAsker...
User1 a bien reçu int.44
On lance les 7 int :
ClientCLient envoie 119 soit w //
ClientCLient envoie 4 soit // Both of this lines are stranges
ClientCLient envoie 7 soit
ClientCLient envoie 8 soit
ClientCLient envoie 9 soit
ClientCLient envoie 10 soit
...et a bien envoyé le portMinimus wrote:
Ok, but this layer has maid just to print in the eclipse console the bytes written on the stream, With or without this function, the flush() operation generate 2 bytes, I don't know why.
When I want to send manually the byte '7', the result of both lines :
oos.writeByte(7);
oos.flush();is that my writeByte and my flush send 3 bytes :
Byte val = 119 charcode = w
Byte val = 1 charcode =
Byte val = 7 charcode =
Only the 'Byte val = 7 charcode = ' line is good.
Why the flush generate 2 unknown bytes at this code position ?Actually, it's (might be) writing more than two bytes. Run this:
public class OOSTest {
public static void main(String[] args) throws Throwable {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeByte(7);
oos.close();
byte[] bytes = baos.toByteArray();
System.out.println(Arrays.toString(bytes));
//prints "[-84, -19, 0, 5, 119, 1, 7]"
}The explanation is in the Javadoc for ObjectOutputStream:
Primitive data, excluding serializable fields and externalizable data, is written to the ObjectOutputStream in block-data records. A block data record is composed of a header and data. The block data header consists of a marker and the number of bytes to follow the header. OOSs should only be used when the OIS is being used properly on the other end. If you don't want this header, use a DataOutputStream. Is there an actual problem or are you just confused about the extra bytes? If there is a problem in reading, my guess is that you're somehow not reading from your OIS symmetrically with your OOS. Can you post a complete, compilable example that demonstrates the behaviour? There's obviously an issue somewhere, I just haven't spotted it yet.
If there wasn't an actual problem in reading, well: there's your explanation.
Edited by: endasil on 26-Oct-2009 10:55 AM -
Problem with lazy initialization in inhereted class
Hi. I have a strange problem. I have 2 classes CMRCommandInputPanel (view ) , class CommandInputFieldsModel (view's model) and 2 classes that inherets from them: CMRDerivitiveCommandInputPanel and DerivativeCommandInputFieldsModel.
the Views looks like:
public class FormPanel extends JPanel {
protected AbstractFormDataModel mFormModel = null;
public FormPanel(AbstractFormDataModel formModel) {
super();
initialize(formModel);
private void initialize(AbstractFormDataModel formModel) {
mFormModel = formModel;
public class CMRCommandInputPanel extends FormPanel {
public CMRCommandInputPanel(AbstractFormDataModel formModel) {
super(formModel);
initialize();
private void initialize() {
initLocalModels();
JPanel mainPanel = new JPanel () ;
mainPanel.setLayout(new BorderLayout());
mainPanel.add(getUpperButtonsPanel(), BorderLayout.NORTH);
mainPanel.add(getFormPanel(), BorderLayout.CENTER);
mainPanel.add(getDownButtonsPanelDefault(), BorderLayout.SOUTH);
mainPanel.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e) {
// set focus on the formPanel in order to set the entered value on mouse click.
getFormPanel().requestFocus();
this.setLayout(new BorderLayout());
this.add(mainPanel);
this.setBorder(UIConstants.DEFAULT_PANEL_BORDER);
protected CMRPanel getFormPanel() {
if (mFormPanel == null) {
adding editable TextFields to the panel.
return mFormPanel;
protected void initLocalModels(){
new CommandInputFieldsModel(mFormModel,this);
public class CMRDerivitiveCommandInputPanel extends CMRCommandInputPanel {
private JTitledTextField mRealizationPriceField = null;
public CMRDerivitiveCommandInputPanel(AbstractFormDataModel formModel) {
super(formModel);
// override of super method
protected CMRPanel getFormPanel() {
if (mFormPanel == null) {
adding super classes editable TextFields to the panel and some new ones
return mFormPanel;
/* (non-Javadoc)
* @see cmr.client.ui.CMRCommandInputPanel#initLocalModels()
protected void initLocalModels() {
new DerivativeCommandInputFieldsModel(mFormModel,this);
public JTextField getRealizationDateField() {
if (mRealizationDateField == null) {
mRealizationDateField = new JTextField();
return mRealizationDateField;
public class CommandInputFieldsModel extends AbstractFieldsDataModel {
protected CMRCommonDataModel mFormModel = null;
protected CMRCommandInputPanel mView = null;
public CommandInputFieldsModel(CMRCommonDataModel data,CMRCommandInputPanel aView){
mFormModel = data;
mView = aView;
mFormModel.registryModel(this,ExBaseDataController.META_KEY);
mFormModel.registryModel(this,CompanyMessagesController.META_KEY);
mFormModel.registryModel(this,DefaultFinancialValueController.META_KEY);
mFormModel.registryModel(this,QuantityValueController.META_KEY);
mFormModel.registryModel(this,RateForPercentController.META_KEY);
/* (non-Javadoc)
* @see cmr.client.ui.data.CMRUpdatable#updateData(java.lang.Object)
public void updateData(Object aNewData) {
updating relevant fields by using getters of View
public class DerivativeCommandInputFieldsModel extends CommandInputFieldsModel {
public DerivativeCommandInputFieldsModel(CMRCommonDataModel data,CMRDerivitiveCommandInputPanel aView){
super(data,aView);
/* (non-Javadoc)
* @see cmr.client.ui.data.CMRUpdatable#updateData(java.lang.Object)
public void updateData(Object aNewData) {
if (aNewData instanceof RealizationData){
RealizationData realizationData = (RealizationData)aNewData;
CMRDerivitiveCommandInputPanel theView = (CMRDerivitiveCommandInputPanel)mView;
theView.getRealizationDateField().setValue(realizationData.getRealizationDate());
theView.getRealizationPriceField().setValue(realizationData.getRealizationPrice());
}else
super.updateData(aNewData);
}The problem is , that when the field's getter of inhereted view's class is called from model for updating field,the fields are beeing initialized for second time. they simply somehow are equal to NULL again. I've checked reference to the view and it's the same,but only new fields still equals to NULL from model.
is someone can help me with that?The only thing that springs to mind is that you're
exporting the newly created fields model object in
the superclass constructor (at least I assume that's
what the registry calls do).
That can cause problems, especially in a
multi-threaded environment (though it's often
tempting). Again there's a risk that the
partly-initialized object may be used.
Actually this is a bit of a weakness of Java as
opposed to C++. In C++ a new object has the virtual
method table set to the superclass VMT during
superclass initialisation. In Java it acquires its
ultimate class indentity immediately.
You'd be safer to extract all that kind of stuff from
the superclass constructor and have some kind of
init() method called after the object was
constructed.
In fact whenever you see a new whose result
you don't do anything with, then you should take it
as a warning.thank you for your replies. ;) I've managed to solve this matter. Simply fully redefined my panel with fields in child-class and added to it's constructor local initialization() method as well, which creates UI of child-class. Even that I initialize UI twice, but all fields are initialized with "lazy initialization" , so there is only once NEW will be called. but there is something weird going in constructors with ovverwritten methods. -
Problem with constructors and using public classes
Hi, I'm totally new to Java and I'm having a lot of problems with my program :(
I have to create constructor which creates bool's array of adequate size to create a sieve of Eratosthenes (for 2 ->n).
Then it has to create public method boolean prime(m) which returs true if the given number is prime and false if it's not prime.
And then I have to create class with main function which chooses from the given arguments the maximum and creates for it the sieve
(using the class which was created before) and returns if the arguments are prime or not.
This is what I've written but of course it's messy and it doesn't work. Can anyone help with that?
//part with a constructor
public class ESieve {
ESieve(int n) {
boolean[] isPrime = new boolean[n+1];
for (int i=2; i<=n; i++)
isPrime=true;
for(int i=2;i*i<n;i++){
if(isPrime[i]){
for(int j=i;i*j<=n;j++){
isPrime[i*j]=false;}}}
public static boolean Prime(int m)
for(int i=0; i<=m; i++)
if (isPrime[i]<2) return false;
try
m=Integer.parseInt(args[i]);
catch (NumberFormatException ex)
System.out.println(args[i] + " is not an integer");
continue;
if (isPrime[i]=true)
System.out.println (isPrime[i] + " is prime");
else
System.out.println (isPrime[i] + " is not prime");
//main
public class ESieveTest{
public static void main (String args[])
public static int max(int[] args) {
int maximum = args[0];
for (int i=1; i<args.length; i++) {
if (args[i] > maximum) {
maximum = args[i];
return maximum;
new ESieve(maximum);
for(int i=0; i<args.length; i++)
Prime(i);}I've made changes and now my code looks like this:
public class ESieve {
ESieve(int n) {
sieve(n);
public static boolean sieve(int n)
boolean[] s = new boolean[n+1];
for (int i=2; i<=n; i++)
s=true;
for(int i=2;i*i<n;i++){
if(s[i]){
for(int j=i;i*j<=n;j++){
s[i*j]=false;}}}
return s[n];}
public static boolean prime(int m)
if (m<2) return false;
boolean x = sieve(m);
if (x=true)
System.out.println (m + " is prime");
else
System.out.println (m + " is not prime");
return x;}
//main
public class ESieveTest{
public static int max(int[] args) {
int maximum = args[0];
for (int i=1; i<args.length; i++) {
if (args[i] > maximum) {
maximum = args[i];
return maximum;
public static void main (String[] args)
int n; int i, j;
for(i=0;i<=args.length;i++)
n=Integer.parseInt(args[i]);
int maximum=max(args[]);
ESieve S = new ESieve(maximum);
for(i=0; i<args.length; i++)
S.prime(i);}
It shows an error for main:
{quote} ESieveTest.java:21: '.class' expected
int maximum=max(args[]); {quote}
Any suggestions how to fix it? -
Problem using repaint() method from another class
I am trying to make tower of hanoi...but unable to transfer rings from a tower to another...i had made three classes....layout21 where all componentents of frame assembled and provided suitable actionlistener.....second is mainPanel which is used to draw the rods n rings in paintComponent.....and third is tower in which code for hanoi is available...i had made an object of mainPanel at layoout21 n tower but i m not able to call repaint from tower..gives an error : cannot find the symbol....method repaint in tower.
code fragments od three classes are:
LAYOUT21
class layout21 extends JFrame implements ActionListener
{ private Vector rod1 = new Vector();
private Vector rod2 = new Vector();
private Vector rod3 = new Vector();
private String elem; //comment
public String r22;
public boolean in=false;
public int count=0; //no of times the transfer to other rods performed
private int r3,rings; // current no of rings
private JComboBox nor,col;
private JLabel no;
private JLabel moved;
private JLabel no1;
private JButton start;
private JButton ref;
private AboutDialog dialog;
private JMenuItem aboutItem;
private JMenuItem exitItem;
private tower t;
final mainPanel2 p =new mainPanel2();
public layout21()
{ t = new tower();
Toolkit kit =Toolkit.getDefaultToolkit();
Image img = kit.getImage("java.gif");
setIconImage(img);
setTitle("Tower Of Hanoi");
setSize(615,615);
setResizable(false);
setBackground(Color.CYAN);
JMenuBar mbar = new JMenuBar();
setJMenuBar(mbar);
JMenu fileMenu = new JMenu("File");
mbar.add(fileMenu);
aboutItem = new JMenuItem("About");
aboutItem.addActionListener(this);
fileMenu.add(aboutItem);
exitItem = new JMenuItem("Exit");
exitItem.addActionListener(this);
fileMenu.add(exitItem);
Container contentPane =getContentPane();
JPanel bspanel = new JPanel();
JPanel bnpanel = new JPanel();
setBackground(Color.CYAN);
//JComboBox
nor = new JComboBox();
nor.setEditable(false);
nor.addItem("3");
nor.addItem("4");
nor.addItem("5");
nor.addItem("6");
nor.addItem("7");
nor.addItem("8");
nor.addItem("9");
bspanel.add(nor);
col = new JComboBox();
col.setEditable(false);
col.addItem("BLACK");
col.addItem("GREEN");
col.addItem("CYAN");
bspanel.add(col);
JLabel tl = new JLabel("Time");
tl.setFont(new Font("Serif",Font.BOLD,12));
bspanel.add(tl);
JTextField tlag = new JTextField("0",4);
bspanel.add(tlag);
start =new JButton("Start");
bspanel.add(start);
ref =new JButton("Refresh");
bspanel.add(ref);
JButton end =new JButton("End");
bspanel.add(end);
start.addActionListener(this);
nor.addActionListener(this);
col.addActionListener(this);
ref.addActionListener(this);
end.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose(); // Closes the dialog
contentPane.add(bspanel,BorderLayout.SOUTH);
JLabel count = new JLabel("No of Transfer reguired:");
count.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(count);
no = new JLabel("7");
no.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(no);
JLabel moved = new JLabel("Moved:");
moved.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(moved);
no1 = new JLabel("0");
no1.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(no1);
contentPane.add(bnpanel,BorderLayout.NORTH);
contentPane.add(p,BorderLayout.CENTER);
String r = (String)nor.getSelectedItem();
rings = Integer.valueOf(r).intValue();
p.draw(rings,1) ;
public void actionPerformed(ActionEvent evt)
{ Object source = evt.getSource();
if(source == start)
r3 = Integer.valueOf((String)nor.getSelectedItem()).intValue();
p.transfer(false);
t.initialise(rod1,rod2,rod3,0);
t.towerOfHanoi(r3);
//repaint();
if(source == ref)
{ rod1.removeAllElements() ;
rod2.removeAllElements() ;
rod3.removeAllElements() ;
count=0;
r3 = Integer.valueOf((String)nor.getSelectedItem()).intValue();
p.draw(r3,1);
p.transfer(true);
no1.setText(""+0);
p.trans_vec(rod1,rod2,rod3);
t.initialise(rod1,rod2,rod3,0);
System.out.println("");
repaint();
if(source == nor)
{ JComboBox j = (JComboBox)source;
String item = (String)j.getSelectedItem();
int ring1 = Integer.valueOf(item).intValue();
int a=1;
for(int i=1;i<=ring1;i++)
{ a = a*2;
a=a-1;
no.setText(""+a);
p.draw(ring1,1);
repaint();
if(source == aboutItem)
{ if (dialog == null) // first time
dialog = new AboutDialog(this);
dialog.setVisible(true);
if(source == exitItem)
{ System.exit(0);
if (source==col)
{ JComboBox j = (JComboBox)source;
String item = (String)j.getSelectedItem();
repaint();
TOWER
class tower extends Thread
{ private Vector rod1 = new Vector();
private Vector rod2 = new Vector();
private Vector rod3 = new Vector();
private int count ;
private String elem;
final mainPanel2 z =new mainPanel2();
public void initialise(Vector r1,Vector r2,Vector r3,int c)
{ rod1 = r1;
rod2 = r2;
rod3 = r3;
count =c;
public void towerOfHanoi(int rings)
for(int i=0;i<rings;i++)
rod1.add(" "+(i+1));
System.out.println("rod1:"+rod1.toString());
hanoi(rings,1,2);
public void hanoi(int m,int i, int j)
if(m>0)
{ hanoi(m-1,i,6-i-j);
if(i==1 && j==2 && rod1.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod1.remove(0);
rod2.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint(); //NOT ABLE TO USE METHOD HERE...WHY??
//z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 2:"+rod2.toString());
if(i==1 && j==3 && rod1.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod1.remove(0);
rod3.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();//
// z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 3:"+rod3.toString());
if(i==2 && j==1 && rod2.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod2.remove(0);
rod1.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 1:"+rod1.toString());
if(i==2 && j==3 && rod2.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod2.remove(0);
rod3.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 3:"+rod3.toString());
if(i==3 && j==1 && rod3.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod3.remove(0);
rod1.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 1:"+rod1.toString());
if(i==3 && j==2 && rod3.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod3.remove(0);
rod2.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
this.sleep(2000);
catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 2:"+rod2.toString());
hanoi(m-1,6-i-j,j);
MAINPANEL
class mainPanel2 extends JPanel //throws IOException
public Vector line = new Vector();
public Vector rod11= new Vector();
public Vector rod22= new Vector();
public Vector rod33= new Vector();
public int no_ring;
public int rod_no;
String pixel;
StringTokenizer st,st1;
int x,y;
public boolean initial =true;
public void paintComponent(Graphics g)
{ System.out.println("repaint test");
bresenham(100,60,100,360);
bresenham(101,60,101,360);
bresenham(102,60,102,360);
bresenham(103,60,103,360);
bresenham(104,60,104,360);
g.setColor(Color.BLUE);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(300,60,300,360);
bresenham(301,60,301,360);
bresenham(302,60,302,360);
bresenham(303,60,303,360);
bresenham(304,60,304,360);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(500,60,500,360);
bresenham(501,60,501,360);
bresenham(502,60,502,360);
bresenham(503,60,503,360);
bresenham(504,60,504,360);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(0,361,615,361);//used to get a pixel according to algo.. . func not provided
bresenham(0,362,615,362);
bresenham(0,363,615,363);
bresenham(0,364,615,364);
bresenham(0,365,615,365);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
if(initial==true)
g.setColor(Color.RED);
for(int i = no_ring;i>0;i--)
{ g.drawLine(100-(i*8),360-(no_ring - i)*10,100+(i*8)+5,360-(no_ring - i)*10);
g.drawLine(100-(i*8),359-(no_ring - i)*10,100+(i*8)+5,359-(no_ring - i)*10);
g.drawLine(100-(i*8),358-(no_ring - i)*10,100+(i*8)+5,358-(no_ring - i)*10);
g.drawLine(100-(i*8),357-(no_ring - i)*10,100+(i*8)+5,357-(no_ring - i)*10);
g.drawLine(100-(i*8),356-(no_ring - i)*10,100+(i*8)+5,356-(no_ring - i)*10);
// draw for each rod
//System.out.println("rod11:"+rod11);
//System.out.println("rod22:"+rod22);
//System.out.println("rod33:"+rod33);
int r1 = rod11.size();
int r2 = rod22.size();
int r3 = rod33.size();
String rd1,rd2,rd3;
int r11,r12,r21,r22,r31,r32;
if(initial == false)
{ g.setColor(Color.RED);
while(rod11.size()>0)
{ r12 = rod11.size()-1;
rd1 = (String)rod11.remove(r12);
r11 = Integer.valueOf(rd1).intValue();
g.drawLine(100-((r11+1)*8),360-(r1 - (r11+1))*10,100+((r11+1)*8)+5,360-(r1 - (r11+1))*10);
g.drawLine(100-((r11+1)*8),359-(r1 - (r11+1))*10,100+((r11+1)*8)+5,359-(r1 - (r11+1))*10);
g.drawLine(100-((r11+1)*8),358-(r1 - (r11+1))*10,100+((r11+1)*8)+5,358-(r1 - (r11+1))*10);
g.drawLine(100-((r11+1)*8),357-(r1 - (r11+1))*10,100+((r11+1)*8)+5,357-(r1 - (r11+1))*10);
g.drawLine(100-((r11+1)*8),356-(r1 - (r11+1))*10,100+((r11+1)*8)+5,356-(r1 - (r11+1))*10);
while(rod22.size()>0)
{ g.setColor(Color.RED);
r22 = rod22.size()-1;
System.out.println("TEST *************************:"+r22);
try
// e.printStackTrace();
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr) ;
br.readLine() ;
}catch(Exception f) {}
rd2 = ((String)rod22.remove(r22)).trim();
r21 = Integer.valueOf(rd2).intValue();
g.drawLine(300-((r22+1)*8),360-(r2 - (r22+1))*10,300+((r22+1)*8)+5,360-(r2 - (r22+1))*10);
g.drawLine(300-((r22+1)*8),359-(r2 - (r22+1))*10,300+((r22+1)*8)+5,359-(r2 - (r22+1))*10);
g.drawLine(300-((r22+1)*8),358-(r2 - (r22+1))*10,300+((r22+1)*8)+5,358-(r2 - (r22+1))*10);
g.drawLine(300-((r22+1)*8),357-(r2 - (r22+1))*10,300+((r22+1)*8)+5,357-(r2 - (r22+1))*10);
g.drawLine(300-((r22+1)*8),356-(r2 - (r22+1))*10,300+((r22+1)*8)+5,356-(r2 - (r22+1))*10);
while(rod33.size()>0)
{ g.setColor(Color.RED);
r32 = rod33.size()-1;
rd3 = (String)rod33.remove(r32);
r31 = Integer.valueOf(rd3).intValue();
g.drawLine(500-((r32+1)*8),360-(r3 - (r32+1))*10,500+((r32+1)*8)+5,360-(r3 - (r32+1))*10);
g.drawLine(500-((r32+1)*8),359-(r3 - (r32+1))*10,500+((r32+1)*8)+5,359-(r3 - (r32+1))*10);
g.drawLine(500-((r32+1)*8),358-(r3 - (r32+1))*10,500+((r32+1)*8)+5,358-(r3 - (r32+1))*10);
g.drawLine(500-((r32+1)*8),357-(r3 - (r32+1))*10,500+((r32+1)*8)+5,357-(r3 - (r32+1))*10);
g.drawLine(500-((r32+1)*8),356-(r3 - (r32+1))*10,500+((r32+1)*8)+5,356-(r3 - (r32+1))*10);
why i m not able to use repaint() method in tower class? from where i can use repaint() methodi can't read your code - not formatted with code tags
I have no chance of getting it to compile (AboutDialog class?? p.draw() ??)
here's a basic routine - add a couple of things to this to demonstrate what is not
being redrawn
(compare the readability of below code (using tags) to yours)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
public Testing()
setSize(400,300);
setLocation(400,300);
setDefaultCloseOperation(EXIT_ON_CLOSE);
final DrawPanel dp = new DrawPanel();
JButton btn = new JButton("Change Text Location/Repaint");
getContentPane().add(dp,BorderLayout.CENTER);
getContentPane().add(btn,BorderLayout.SOUTH);
btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
dp.x = (int)(Math.random()*300);
dp.y = (int)(Math.random()*150)+50;
repaint();}});
public static void main(String[] args){new Testing().setVisible(true);}
class DrawPanel extends JPanel
int x = 50, y = 50;
public void paintComponent(Graphics g)
super.paintComponent(g);
g.drawString("Hello World",x,y);
} -
Issue with CHECK_CHANGED_DATA method of CL_GUI_ALV_GRID class
HI,
I want to check whether my grid has any changes or not, for that i am using the CHECK_CHANGED_DATA method of CL_GUI_ALV_GRID class,
What i am doing is.... I am doing some changes in my grid data and clicking on SAVE . This time CHECK_CHANGED_DATA is saying the grid have changes ,and i am displaying a pop up whether to save the changes or not. And i am saving changes.
Till now Fine.
If i click on SAVE again CHECK_CHANGED_DATA is showing again the Grid has changes.
So how can i solve this problem.
Thanks in advance.Hello Narendra
If you do not need to do any validations of the changed ALV list data then you can use a very simple approach which does not even require an event handler for event DATA_CHANGED.
The crucial part of the coding is shown below, followed by the entire sample report ZUS_SDN_ALV_EDITABLE_1A. Basically, the ALV list is stored as a "PBO" image of the data (GT_OUTTAB_PBO). And only if the user changed the data (i.e. GT_OUTTAB_PBO <> GT_OUTTAB) the save option including the popup is executed.
*& Module USER_COMMAND_0100 INPUT
* text
MODULE user_command_0100 INPUT.
" NOTE: retrieve changed data from frontend (grid control) into
" the backend (itab in ABAP)
go_grid->check_changed_data( ).
CASE gd_okcode.
WHEN 'BACK' OR
'EXIT' OR
'CANC'.
SET SCREEN 0. LEAVE SCREEN.
WHEN 'SAVE'.
IF ( gt_outtab = gt_outtab_pbo ).
MESSAGE 'No data changed' TYPE 'S'.
ELSE.
CLEAR: gd_answer.
CALL FUNCTION 'POPUP_TO_CONFIRM'
EXPORTING
* TITLEBAR = ' '
* DIAGNOSE_OBJECT = ' '
text_question = 'Save data?'
IMPORTING
answer = gd_answer
* TABLES
* PARAMETER =
EXCEPTIONS
text_not_found = 1
OTHERS = 2.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
IF ( gd_answer = '1' ). " yes
MESSAGE 'Data successfully saved' TYPE 'S'.
gt_outtab_pbo = gt_outtab. " update PBO data !!!
ELSE.
MESSAGE 'Action cancelled by user' TYPE 'S'.
ENDIF.
ENDIF.
WHEN OTHERS.
ENDCASE.
CLEAR: gd_okcode.
ENDMODULE. " USER_COMMAND_0100 INPUT
*& Report ZUS_SDN_ALV_EDITABLE
* Flow logic of screen '100' (no elements, ok-code => gd_okcode ):
**PROCESS BEFORE OUTPUT.
** MODULE STATUS_0100.
**PROCESS AFTER INPUT.
** MODULE USER_COMMAND_0100.
REPORT zus_sdn_alv_editable_1a.
TYPE-POOLS: abap.
CONSTANTS:
gc_tabname TYPE tabname VALUE 'KNB1'.
TYPES: BEGIN OF ty_s_outtab.
INCLUDE TYPE knb1.
TYPES: END OF ty_s_outtab.
TYPES: ty_t_outtab TYPE STANDARD TABLE OF ty_s_outtab
WITH DEFAULT KEY.
DATA:
gd_okcode TYPE ui_func,
gd_repid TYPE syst-repid,
gt_fcat TYPE lvc_t_fcat,
gs_layout TYPE lvc_s_layo,
gs_variant TYPE disvariant,
go_docking TYPE REF TO cl_gui_docking_container,
go_grid TYPE REF TO cl_gui_alv_grid.
DATA:
gs_outtab TYPE ty_s_outtab,
gt_outtab TYPE ty_t_outtab,
gt_outtab_pbo TYPE ty_t_outtab.
DATA:
gd_answer TYPE c.
START-OF-SELECTION.
SELECT * FROM (gc_tabname) INTO TABLE gt_outtab UP TO 99 ROWS.
gt_outtab_pbo = gt_outtab. " set PBO data
PERFORM init_controls.
* ok-code field = GD_OKCODE
CALL SCREEN '0100'.
END-OF-SELECTION.
*& Form INIT_CONTROLS
* text
* --> p1 text
* <-- p2 text
FORM init_controls .
* Create docking container
CREATE OBJECT go_docking
EXPORTING
parent = cl_gui_container=>screen0
ratio = 90
EXCEPTIONS
OTHERS = 6.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Create ALV grid
CREATE OBJECT go_grid
EXPORTING
i_parent = go_docking
EXCEPTIONS
OTHERS = 5.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
" NOTE: not required
* set handler:
* lcl_eventhandler=>handle_data_changed for go_grid.
* Build fieldcatalog and set hotspot for field KUNNR
PERFORM build_fieldcatalog.
PERFORM set_layout_and_variant.
* Display data
CALL METHOD go_grid->set_table_for_first_display
EXPORTING
is_layout = gs_layout
is_variant = gs_variant
i_save = 'A'
CHANGING
it_outtab = gt_outtab
it_fieldcatalog = gt_fcat
EXCEPTIONS
OTHERS = 4.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* NOTE:
* Documenation of I_SAVE ("An Easy Reference for ALV Grid Control")
*I_SAVE
*Determines the options available to the user for saving a layout:
*? 'X': global saving only
*? 'U': user-specific saving only
*? 'A': corresponds to 'X' and 'U'
*? SPACE: no saving
* Link the docking container to the target dynpro
gd_repid = syst-repid.
CALL METHOD go_docking->link
EXPORTING
repid = gd_repid
dynnr = '0100'
* CONTAINER =
EXCEPTIONS
OTHERS = 4.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDFORM. " INIT_CONTROLS
*& Module STATUS_0100 OUTPUT
* text
MODULE status_0100 OUTPUT.
SET PF-STATUS 'STATUS_0100'.
* SET TITLEBAR 'xxx'.
ENDMODULE. " STATUS_0100 OUTPUT
*& Module USER_COMMAND_0100 INPUT
* text
MODULE user_command_0100 INPUT.
" NOTE: retrieve changed data from frontend (grid control) into
" the backend (itab in ABAP)
go_grid->check_changed_data( ).
CASE gd_okcode.
WHEN 'BACK' OR
'EXIT' OR
'CANC'.
SET SCREEN 0. LEAVE SCREEN.
WHEN 'SAVE'.
IF ( gt_outtab = gt_outtab_pbo ).
MESSAGE 'No data changed' TYPE 'S'.
ELSE.
CLEAR: gd_answer.
CALL FUNCTION 'POPUP_TO_CONFIRM'
EXPORTING
* TITLEBAR = ' '
* DIAGNOSE_OBJECT = ' '
text_question = 'Save data?'
* TEXT_BUTTON_1 = 'Ja'(001)
* ICON_BUTTON_1 = ' '
* TEXT_BUTTON_2 = 'Nein'(002)
* ICON_BUTTON_2 = ' '
* DEFAULT_BUTTON = '1'
* DISPLAY_CANCEL_BUTTON = 'X'
* USERDEFINED_F1_HELP = ' '
* START_COLUMN = 25
* START_ROW = 6
* POPUP_TYPE =
* IV_QUICKINFO_BUTTON_1 = ' '
* IV_QUICKINFO_BUTTON_2 = ' '
IMPORTING
answer = gd_answer
* TABLES
* PARAMETER =
EXCEPTIONS
text_not_found = 1
OTHERS = 2.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Triggers PAI of the dynpro with the specified ok-code
IF ( gd_answer = '1' ). " yes
MESSAGE 'Data successfully saved' TYPE 'S'.
gt_outtab_pbo = gt_outtab. " update PBO data !!!
ELSE.
MESSAGE 'Action cancelled by user' TYPE 'S'.
ENDIF.
ENDIF.
WHEN OTHERS.
ENDCASE.
CLEAR: gd_okcode.
ENDMODULE. " USER_COMMAND_0100 INPUT
*& Form BUILD_FIELDCATALOG
* text
* --> p1 text
* <-- p2 text
FORM build_fieldcatalog .
* define local data
DATA:
ls_fcat TYPE lvc_s_fcat.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
* I_BUFFER_ACTIVE =
i_structure_name = gc_tabname
* I_CLIENT_NEVER_DISPLAY = 'X'
* I_BYPASSING_BUFFER =
* I_INTERNAL_TABNAME =
CHANGING
ct_fieldcat = gt_fcat
EXCEPTIONS
inconsistent_interface = 1
program_error = 2
OTHERS = 3.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ls_fcat-edit = abap_true.
MODIFY gt_fcat FROM ls_fcat
TRANSPORTING edit
WHERE ( key NE abap_true ).
ENDFORM. " BUILD_FIELDCATALOG
*& Form SET_LAYOUT_AND_VARIANT
* text
* --> p1 text
* <-- p2 text
FORM set_layout_and_variant .
CLEAR: gs_layout,
gs_variant.
gs_layout-cwidth_opt = abap_true.
gs_layout-zebra = abap_true.
gs_variant-report = syst-repid.
gs_variant-handle = 'GRID'.
ENDFORM. " SET_LAYOUT_AND_VARIANT
Regards
Uwe -
Problems calling a method in another class
I have the following method in a class called recordCalls -
public static void objectCreated(String type, String name)
System.out.println("An object of type " + type + " called " + name + " has been created.");
// addObjectToPanel(type, name);
}I am attempting to call addObjectToPanel(type, name) which is a method inside a class called test.
I do not want to create an instance of test an call it like test.addObjectToPanel(type, name)
Is there any other way of doing this.
Thanks.You either have to make the method static, and call
test.addObjectToPanel or you have to create an
instance of test and invoke the method on that
instance.
I don't know what that class is supposed to do, so I
don't know which is more appropriate.
You should name your classes starting with capital
letters, and Test is a very undescriptive (and hence
bad) name for that class.I will be chaning the names of everything when the class works.
Test contains the UI for my program.
When I run test then my UI is runing, once I run addObjectToPanel from the record calls class it should put images into my UI,
the problem is that each time the method is run it open up a different UI and adds an image to it instead of just adding the images to the window which is already open. -
Problem with file.listFiles() of File class??
Hi all friends,
Iam facing with one peculiar problem,Iam using [file.listfiles()] method of File class in my program and this method of file class introduced in Java2.Now when Iam runing on Mac OS classic(8 to 9)[it is my client requirement they can't change Mac OS classic to Mac OS X] it is giving me error file.listfiles() not found in java.io package coz in Mac classic I have used MRJ2.2.6(for runtime) and MRJ SDK2.2 which is based on jdk1.1.8 and this method[listfiles()] added in java2.But now for me I can't change this method in program coz it is a big code and I have to change lot of things in my program.Can any one plz tell me can i find any (java.io) package of java2 seperately in the from of .jar or .zip so that i can keep it in my MRJCLASSES folder and from there I can import it in my program.Eagerly waiting for reply.
Regards
BikashJust use File.list(). There are minor semantical differences but they are easy to work around.
-
Problem with binarySearch method
In the code below I've got a problem with my binarySearach method in the IntegerList.java file. When I look at my IntegerTest file, Eclipse give me this message next to my method call for the binarySerch (case 6): (the method binarySearch int[] , int) in the type integerList is not applicable for the arguments (int). So what the heck have I done wrong? I know it's a lot of code to look at but felt you'll need to see both classes to make heads or tales out of this.
Thanks in advance.
import java.util.Scanner;
public class IntegerList //implements Comparable
int [] list; // values in the list
//Constructor -- takes an integer and creates a list of that
//size. All elements default to value 0.
public IntegerList(int size)
list = new int[size];
//randomize -- fills the array with randomly generated integers
//between 1 and 100, inclusive
public void randomize()
int max = list.length;
for (int i=0; i < list.length; i++)
list[i] = (int) (Math.random() * max) +1;
//fillSorted -- fills the array with sorted values
public void fillSorted()
for (int i =0; i <list.length; i++)
list = i + 2;
//print -- prints array elements with indices, one per line
public String toString()
String s = "";
for (int i = 0; i <list.length; i++)
s += i + ":\t" + list[i] + "\n";
return s;
//linearSearch -- takes a target value and returns the index
//of the first occurrence of target in the list. Returns -1
//if target does not appear in the list
public int linearSearch (int target)
int location = -1;
for (int i = 0; i < list.length && location == -1; i++)
if (list [i] == target)
location = i;
return location;
//sortIncresing -- uses selection sort
public void sortIncreasing()
for (int i =0; i < list.length -1; i++)
int minIndex = minIndex(list, i);
swap (list, i, minIndex);
private void swap(int[] list, int index, int min)
int temp =list [index];
list [index] = list [min];
list [min] = temp;
// private int minIndex(int[] list, int index)
public int minIndex(int[] list, int lastIndex) {
int min=list[lastIndex];
for (int i=lastIndex+1; i<list.length; i++)
if (list[i]<min)
lastIndex=i;
return lastIndex;
public void sortDecreasing()
for (int i =0; i > list.length -1; i++)
int minIndex = minIndex(list, i);
swap (list, i, minIndex);
public static int binarySearch (int [] list, int val)
int min = 0, max = list.length, mid =0;
boolean found = false;
while (!found && min <= max)
mid = (min + max) / 2;
if (list [mid]== val)
found = true;
//if the mid point contains the value being searched for
//then we are done
else
if (list[mid]< val)
max = mid -1;
else
min = mid+1;
if (found)
return list[mid];
else
return -1;
return val;
}//end class
//now for the IntegerListTest class
//File: integerListTest.java
//Purpose: Provide a menu-driven tester for the IntegerList class.
import java.util.*;
public class IntegerListTest
static IntegerList list = new IntegerList(10);
static Scanner scan = new Scanner(System.in);
// main -- creates an initial list, then repeatedly prints
// the menu and does what the user asks until they quit
public static void main(String [] args)
printMenu();
int choice = scan.nextInt();
while (choice != 0)
dispatch(choice);
printMenu();
choice = scan.nextInt();
// dispatch -- takes a choice and does what needs doing
public static void dispatch(int choice)
int loc;
int val;
long time1, time2;
long totalTime;
switch (choice)
case 0:
System.out.println("Bye!");
break;
case 1:
System.out.println(list);
break;
case 2:
System.out.println("How big should the list be?");
list = new IntegerList (scan.nextInt());
System.out.println("List is created.");
break;
case 3:
list.randomize();
System.out.println("List is filled with random elements.");
break;
case 4:
list.fillSorted();
System.out.println("List is filled with sorted elements.");
break;
case 5:
System.out.print("Enter the value to look for: ");
val = scan.nextInt();
time1 = System.currentTimeMillis();
loc = list.linearSearch(val);
time2 = System.currentTimeMillis();
totalTime = time1 - time2;
System.out.print(totalTime);
if (loc != -1)
System.out.println("Found at location " + loc);
else
System.out.println("Not in list");
break;
case 6:
System.out.print("Enter the value to look for: ");
val = scan.nextInt();
loc = list.binarySearch(val);
if (loc != -1)
System.out.println("Found at location " + loc);
else
System.out.println("Not in list");
break;
case 7:
list.sortIncreasing();
System.out.println("List has been sorted.");
break;
case 8:
list.sortDecreasing();
System.out.println("List has been sorted.");
break;
default:
System.out.println("Sorry, invalid choice");
// printMenu -- prints the user's choices
public static void printMenu()
System.out.println("\n Menu ");
System.out.println(" ====");
System.out.println("0: Quit");
System.out.println("1: Print the list");
System.out.println("2: Create a new list of a given size");
System.out.println("3: Fill the list with random ints in range 1-length");
System.out.println("4: Fill the list with already sorted elements");
System.out.println("5: Use linear search to find an element");
System.out.println("6: Use binary search to find an element " +
"(list must be sorted in increasing order)");
System.out.println("7: Use selection sort to sort the list into " +
" increasing order");
System.out.println("8: Use insertion sort to sort the list into " +
" decreasing order");
System.out.println("\nEnter your choice: ");Ah... But now that I have looked at it some more, I have noticed that the array of int is created in your IntegerList class...
so you want to change your binarySearch() method...
from...
public static int binarySearch (int[] list,int val)to
public int binarySearch (int val)now it will search the list declared in your constructor...
and also note that static is remove to eliminate the non-static reference from static context error...
so in IntegerList.java, that method signature should look like this...
public int binarySearch (int val)// take only one arguement and...
// check against internal int [] listand you call it like this...
loc = list.binarySearch(val);// not changednow all you have to do it get your list populated with random integers for the rest to work... I leave that to you...
- MaxxDmg...
- ' He who never sleeps... '
Maybe you are looking for
-
For all of you who can't play Purchased tunes from iTunes...
I spoke to AppleCare and solved the problem. You need to Restore your iPod software. It works! If you need help let me know or someone else please post. Gotta run out for a bit...
-
Hi, I am working in adding the new fields in standard Contract form (BBP_CONTRACT). In W_CONTRACTDETAILS window, there is a field call E-mail in text 'TE_CONTACT'. The value for this field is coming from field &SF_CTR-RESP_EMPLOYEE-E_MAIL&. When I a
-
I have a requirement where A, B, C are three tables. I have joined all tables. At a given time i can have Case 1: data in all tables or Case 2: data in only table A and no related record in B and C. When Case 2: Because there is a join from B to C al
-
New distro releases, featuring Mageia and Mint
Mageia, the community fork of the now-deceased Mandriva distro,droppedMageia 5 a couple ofweeks ago, andeWeek has a slideshowof new and improved features. A similar alternative,OpenMandriva, also has a new release.Meanwhile, Linux Mint 17.2 Cinnamon,
-
Migrated old back-up to new MacBook Pro, but now new machine doesn't recognize old back-up
So last night I migrated my old back-up to my new MacBook Pro, but this morning my new machine doesn't recognize my old back-up. I'd rather not erase and back-up from scratch for numerous reasons (losing the old data, time, etc). Any suggestions? I'l