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nachiket dave wrote: the program above shows error regarding invalid file structure...i tried 3-4 files but it shows same error
That is a fairly good indication that your code is wrong. Go back and check the file structure and make sure that your code is extracting the correct size fields from it.
Just say 'NO' to evaluated arguments for diadic functions! Ash
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hello friends in my project i have an arraylist showing results in a jsp page table of given contents of database, i want to add a filter to it to show only the matched contents from list,
the table which is coming out is as:
student_id class_id student_name
1x0001 10 Ashish
1x2001 11 Anurag
1x2002 11 Arpit
1x0001 10 Alok
.............going on...
but i want the result to display page only for class_id::11 and remove other results how to do that?
greatest things can be achieved with small but innocent ideas
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easy..
i think you're setting the table via a TableModel:
new AbstractTableModel() {
public String getColumnName(int col) {
return columnNames[col].toString();
}
public int getRowCount() { return rowData.length; }
public int getColumnCount() { return columnNames.length; }
public Object getValueAt(int row, int col) {
return rowData[row][col];
}
public boolean isCellEditable(int row, int col)
{ return true; }
public void setValueAt(Object value, int row, int col) {
rowData[row][col] = value;
fireTableCellUpdated(row, col);
}
}
- While filling the table you can select the rows to be added to the table by a simple mechanism. This would not modify the ArrayList.
- Also you can set up a filtered, temporary ArrayList and give that one to the table.
- check this filtering @ oracle.com JAVA tutorials
Choose your way and keep things easy (comments help...)
regards,
Torsten
I never finish anyth...
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well just to be clear, this question is not related to swing its related to servlet J2EE,
A very similar example of my case is here link[^] which is returning only names and id of people but in my case its name ,id, class id thus i have to filter the data as per my needs,
anyways i am going to see the arraylist sorting method in your given link.
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Hello Everyone,
I have been recently tasked to pick up java relatively quickly and have been scouring message boards and search engines in search of finding the best medium to teach myself java. I do have some front end dev experience but haven’t used it in years and been earning my keep in software quality. I apologize if this has been answered recently. I did search thru this message board a bit, but my findings were geared towards folks who already know java and were looking to expand on something in particular.
Does anyone out there have a preferred online tutorial/course or book? Thank you for your time!
Best,
-Alan
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If you have been using search engines you must surely have come across this[^].
Just say 'NO' to evaluated arguments for diadic functions! Ash
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Of course I found that. I was looking to see what options the community found to be more helpful than others
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alrubi00 wrote: Of course I found that.
Well perhaps you should have mentioned it in your first message.
Just say 'NO' to evaluated arguments for diadic functions! Ash
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I think you replied to the wrong message old chap.
Just say 'NO' to evaluated arguments for diadic functions! Ash
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yup you are right switching between to many forums is sometimes very confusing
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Get yourself a good book - check out amazon or buy it in a shop where you can read a bit and see if the book is the right one for you.
Books are more simple to use when learning a language - you can take a look while coding remains on the screen.
regards,
Torsten
I never finish anyth...
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then why dont you try here it have almost everything you need until you need something very specific here[^]
also there is a good book name complete reference by it..
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I would iterate, reading lines as String s and checking using String.matches(String regex) , no need to convert to char arrays, etc.
CQ de W5ALT
Walt Fair, Jr., P. E.
Comport Computing
Specializing in Technical Engineering Software
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Take a look at the String.substring() and String.toupper() methods.
CQ de W5ALT
Walt Fair, Jr., P. E.
Comport Computing
Specializing in Technical Engineering Software
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String has a replace method. No need for regular expressions or substrings or anything, just call replace. You may need to think a bit if you want to replace only single words (e.g. "testament" does not become "testaMEnt") but it's still pretty straightforward.
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I'm doing a Accelerometer on Android. I want the program to trigger the Chronometer if the values of the X and Y axis are 0. My codes for the Chronometer is correct. But I'm not sure if the code below is the correct way of calling the Chronometer class. Thanks for the help in advance.
package com.example.testsensors;
import android.content.Intent;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
public class Decision extends ChronometerDemo1 {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onSensorChanged(SensorEvent event) {
if (event.values[0] <= 0.3 && event.values[0] > 0.0) {
Intent i = new Intent(this,ChronometerDemo1.class);
startActivity(i);
}
else if (event.values[1] <= 1.2 && event.values[1] > 0.0) {
Intent i = new Intent(this,ChronometerDemo1.class);
startActivity(i);
}
else if (event.values[2] <= 10 && event.values[2] > 0.0) {
Intent i = new Intent(this,ChronometerDemo1.class);
startActivity(i);
}
else{
Intent i = new Intent(this,ChronometerDemo1.class);
startActivity(i);
}
}
public static void onCreate() {
}
}
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Your question is unclear and the code is meaningless. Try to post the actual code that is not working and explain what results you expect and what results you see.
Just say 'NO' to evaluated arguments for diadic functions! Ash
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I'm trying to call this class. But the Decision class can't call this ChronometerDemo1 class.
package com.example.testsensors;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.SystemClock;
import android.util.Log;
import android.view.Menu;
import android.widget.Chronometer;
import android.widget.Toast;
public class ChronometerDemo1 extends Activity {
private static final String TAG = "CustomChronometerActivity";
private static final String MS_ELAPSED = "com.etc.etc.MsElapsed";
private static MyChronometer chrono;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
chrono = new MyChronometer(this);
chrono.start();
setContentView(chrono);
}
@Override
protected void onPause() {
Log.i(TAG, "onPause()");
super.onPause();
chrono.stop();
}
@Override
protected void onResume() {
Log.i(TAG, "onResume()");
super.onResume();
chrono.start();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.i(TAG, "onSaveInstanceState()");
chrono.stop();
outState.putInt(MS_ELAPSED, chrono.getMsElapsed());
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
Log.i(TAG, "onRestoreInstanceState()");
int ms = savedInstanceState.getInt(MS_ELAPSED);
chrono.setMsElapsed(ms);
chrono.start();
}
class MyChronometer extends Chronometer {
public int msElapsed;
public boolean isRunning = false;
public MyChronometer(Context context) {
super(context);
invalidate();
}
public int getMsElapsed() {
return msElapsed;
}
public void setMsElapsed(int ms) {
setBase(getBase() - ms);
msElapsed = ms;
}
@Override
public void start() {
super.start();
setBase(SystemClock.elapsedRealtime() - msElapsed);
isRunning = true;
}
@Override
public void stop() {
super.stop();
if(isRunning) {
msElapsed = (int)(SystemClock.elapsedRealtime() - this.getBase());
}
isRunning = false;
}
}
public static void onCreate() {
chrono.start();
}
}
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If you posted the build error, it'd show what the problem is. I suspect that:
chrono = new MyChronometer(this);
Can't invoke the Chronometer constructor as is signature is public MyChronometer(Context context) .
Panic, Chaos, Destruction.
My work here is done.
or "Drink. Get drunk. Fall over." - P O'H
OK, I will win to day or my name isn't Ethel Crudacre! - DD Ethel Crudacre
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ChronometerDemo1 extends Activity, Activity extends Context, so ChronometerDemo1 is a Context so this should be OK.
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