Printable View
uhh...emm how do i add components to my program while my program runs? I want to make a label with an image that changes as a variable decreases, but add wont add it>_>
this is outside my constructor so i cant really add it...Code:public void add_straight(){
add(mood_label_straight);
repaint();
}
After adding the component call the revalidate() method of the panel you have added the component to.
and if the constructor of the file class is the pannel i use file.revalidate()?
That doesn't make any sense to me.Quote:
and if the constructor of the file class is the pannel i use file.revalidate()?
In this case revalidate() basically tells the component it is called on to relayout its children (actually it's more complex than that but at this stage you don't need to know the details). So the component you add your new component to is the component you need to call revalidate() on. ie
Code:public void add_straight(){
add(mood_label_straight);
revalidate();
repaint();
}
Quote:
That doesn't make any sense to me.
after reading it makes no sense to me either-.- conclusiaon: dont use forums when you have been writing in java for 3 hours. Anyway, what i meant:
in the gui class i use the constructor itself as a panel, by extending JFrame. (public gui extends JFrame);
so am i going to use gui.revalidate();?
oh, no no no my bad... it's gui.add(item); item.revalidate(); ?
emm..ok .. short question. Is there a way i can call an object of a class only once, no matter how many times it's accessed by the user?(sounds confusing but here's the scenario)
i have a mood thread which substracts 1 from a mood variable every 5 secs;
i added a feature to the gui class that whenever the usertext field is accessed you raise the mood variable by 1. when the mood reaches 5, a happy imageicon is displayed, when it reaches -1 a bored imageicon is displayed. Between 0 and 5 a pokerface imageicon is displayed.
now the problem. I added t_1.start(); in the constructor of the gui class, since thats the only admitted position. But whenever i press enter on the user text textbox i start the thread again.
This causes the program to go crazy:D
so, how to solve this. Here are the changes i made, not major but notable.
gui
Code:import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class gui extends JFrame{
public JTextField usertext=new JTextField("input here",20);
public JTextField talkativetext=new JTextField(20);
Ret_True retobj=new Ret_True();
ImageIcon mood_icon_straight=new ImageIcon("C://talkative//resources//images//basic//straight.png");
ImageIcon mood_icon_happy=new ImageIcon("C://talkative//resources//images//basic//happy.png");
ImageIcon mood_icon_bored=new ImageIcon("C://talkative//resources//images//basic//bored.png");
JLabel mood_label_straight=new JLabel(mood_icon_straight);
JLabel mood_label_happy=new JLabel(mood_icon_happy);
JLabel mood_label_bored=new JLabel(mood_icon_bored);
Thread t_1=new Thread(new mood_thread());
public int mood=0;
boolean t_trig=true;
public String textset="";
public void settextgui(){
file fob=new file();
mood++;
talkativetext.setText(fob.returnidk());
}
public gui(){
//gui
super("talkative");
setLayout(new FlowLayout());
add(usertext);
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(talkativetext);
if (retobj.ret_true()==true){t_1.start(); retobj.ret_false();}
listener ob=new listener();
usertext.addActionListener(ob);
//constructors for other classes
}
public class listener implements ActionListener{
public void actionPerformed(ActionEvent e){
//constructors
file objectfile=new file();
//brain
if(e.getSource()==usertext){
String usertextget=String.format(""+e.getActionCommand());
objectfile.getAnswer(usertextget);mood++;
talkativetext.setText(objectfile.returnAnswer());
}
}
}
public class mood_thread implements Runnable{
public void run(){while(true){System.out.println(mood);
try{if(mood>0&&mood<=5){add_straight();System.out.println("\n");}
if(mood>5){add_happy();System.out.println("\n");}
if(mood<=0){add_bored();System.out.println("\n");}
Thread.sleep(5000);
mood--;
}catch(Exception e){System.out.println("Error at Sleeping");}
}
}
public void add_straight(){
remove(mood_label_happy);
remove(mood_label_bored);
add(mood_label_straight);validate();
}
public void add_happy(){remove(mood_label_straight);
remove(mood_label_bored);add(mood_label_happy); validate();}
public void add_bored(){remove(mood_label_happy);
remove(mood_label_bored);add(mood_label_straight);validate();}
}}
Ret_True (new class)
tiny isn't it?:DCode:
public class Ret_True {
public boolean ret=true;
public boolean ret_true(){
return ret;
}
public void ret_false(){ret=false;}
}
thank you in advance
oh, ye i forgot. Ret_True is a class i tried using as a safelock. Once used, thread start changes "ret" to false so it cant be used again. This turned out to be incorrect
A constructor is only ever called once for each object and that is as it is created so you don't need to do anything special to make sure the code in the constructor is only ever run once.Quote:
ow the problem. I added t_1.start(); in the constructor of the gui class,
Why are you trying to create your own lock class when Java has a perfectly good set a lock classes in the java.util.concurrent and java.util.concurrent.locks packages.Quote:
Ret_True is a class i tried using as a safelock.
Working with threads is tricky and there are many pitfalls so you should read the java concurrency tutorial before doing so.
oh, okay:D i watched a 4-minute tutorial on threads which resulted in a fail:)
fast question:
why when trying to acces an object specified in the gui method before the constructor with a method outside the constructor(ill make a drawing) i get this"fob cannot be resolved", fob being the object for the file class
code
Code:public void set_string(){
test=fob.ret_loc();
System.out.print("reached where i should have"+test+"\n\n\n");
}
ok the drawing
--------gui class----------
|
|_file fob=new file();
|
|_constructor
|
|
|_end of constructor
|
|
|_the problematic class
i dont want to post the whole code since it'll just confuse you more.
solved the first problem by ascending the class a bit. But now the gui window wont show up...
i am posting the gui class because i've already encountered the window-not-showing problem some times before. Before i was able to dodge them, but now it doesent seem so
Code://this release uses imageicons for mood
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class gui extends JFrame{
public JTextField usertext=new JTextField("input here",20);
public JTextField talkativetext=new JTextField(20);
ImageIcon mood_icon_straight=new ImageIcon("C://talkative//resources//images//basic//straight.png");
ImageIcon mood_icon_happy=new ImageIcon("C://talkative//resources//images//basic//happy.png");
ImageIcon mood_icon_bored=new ImageIcon("C://talkative//resources//images//basic//bored.png");
JLabel mood_label_straight=new JLabel(mood_icon_straight);
JLabel mood_label_happy=new JLabel(mood_icon_happy);
JLabel mood_label_bored=new JLabel(mood_icon_bored);
Thread t_1=new Thread(new mood_thread());
public int mood=0;
file fob=new file();
public String textset="";
public String test="";
public void settextgui(){
file fob=new file();
talkativetext.setText(fob.returnidk());
}
public gui(){
//gui
super("talkative");
setLayout(new FlowLayout());
add(usertext);
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(Box.createHorizontalStrut(80000));
add(talkativetext);
t_1.start();
listener ob=new listener();
usertext.addActionListener(ob);
//constructors for other classes
}public void set_string(){
test=fob.ret_loc();
System.out.print("reached where i should have"+test+"\n\n\n");
}
public class listener implements ActionListener{
public void actionPerformed(ActionEvent e){
//constructors
file objectfile=new file();
//brain
if(e.getSource()==usertext){gui gob=new gui();
String usertextget=String.format(""+e.getActionCommand());
objectfile.getAnswer(usertextget);gob.set_string();
talkativetext.setText(objectfile.returnAnswer());
}
}
}
public class mood_thread implements Runnable{
public void run(){while(true){System.out.println(mood);
try{if(mood>0&&mood<=5){add_straight();System.out.println("\n");}
if(mood>5){add_happy();System.out.println("\n");}
if(mood<=0){add_bored();System.out.println("\n");}
Thread.sleep(5000);
mood++;
}catch(Exception e){System.out.println("Error at Sleeping");}
}
}
public void add_straight(){
remove(mood_label_happy);
remove(mood_label_bored);
add(mood_label_straight);validate();
}
public void add_happy(){remove(mood_label_straight);
remove(mood_label_bored);add(mood_label_happy); validate();}
public void add_bored(){remove(mood_label_happy);
remove(mood_label_bored);add(mood_label_straight);validate();}
}
}
-------------------------------------------------------------------------------------------------
:D i just blue screened my computer by opening the program 43 times by mistake:D
Please start a new thread when asking a new question.
On the contrary, posting the whole code is what you need to do, or at least enough of it to provide an otherwise compilable class that shows the problem.Quote:
i dont want to post the whole code since it'll just confuse you more.
i guess i will clean up the code and experiment some more, maybe ill get around the problem.
Where is the code that sets the frame to visible and are you running it from the event dispatch thread?Quote:
But now the gui window wont show up...