How to override methods from dynamic instaniated class to call externally?

Hi,
Does anyone knows how to get processWindowEvent() from JFrame to call externally without having to override it in a subclass.
public class UserFrame extends JFrame {
public class Application {
public void main(String[] args) {
UserFrame frame = (UserFrame ) UserFrame .class.newInstance();
processWindowEvent(WindowEvent evt) {
the point is to get the instantiated UserFrame to call Application's processWindowEvent() whenever the window event is generated without having to override it in UserFrame.
Any expert on this?

The point is there will be several subclasses of JFrame and I would not want to mannually override each subclasses, but by getting any JFrams's method to be delegated to call another method. VB.net, Delphi and etc. have a feature called class method delegation.
Java has a feature called method Proxy by using InvocationHandler class but is there any example how it could perform what I require?

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How to invoke methods from an other class?

Hello,
I've got the following problem I can't solve:
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If viewtiff would be created by myself with the new operator, this wouldn't be a problem. I just had to write instance_name.method() to invoke it, but in this case I don't know the instance name of my viewtiff class because it gets created by the JApplet I think.
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Many thanks,
Sebastian Tyler

in the constructor// in ViewApplet:
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// in ViewTIFF:
class ViewTIFF {
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}>> a setter method// in ViewApplet:ViewTIFF vt = new ViewTIFF ();
vt.setViewApplet (this);
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How do I call an Application Module method from a EntityImpl class?

Guys and Gals,
Using Studio Edition Version 11.1.1.3.0.
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Thanks Timo.
Turns out the code provided was correct, but the AppModuleImpl method being called was not. A dependent ViewObject wasn't returning the row I was expecting. I then tried to perform some operations on that row, which in turn ... just stopped everything, but didn't give me an error.
It was the lack of the error that threw me off. I had never messed with calling an AppModuleImpl method from the EntityImpl so I assumed that's what was messing up.
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Calling a method from a super class

Hello, I'm trying to write a program that will call a method from a super class. This program is the test program, so should i include extends in the class declaration? Also, what code is needed for the call? Just to make things clear the program includes three different types of object classes and one abstract superclass and the test program which is what im having problems with. I try to use the test program to calculate somthing for each of them using the abstract method in the superclass, but its overridden for each of the three object classes. Now to call this function what syntax should I include? the function returns a double. Thanks.

Well, this sort of depends on how the methods are overridden.
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How to override methods in JDeveloper simply!????

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Having just used Eclipse for the 1st time, I am now very frustrated by JDeveloper!!!
In Eclipse, if I create a class that extends another, I can simply right click and import methods from the super class to override!
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Need help calling a method from an immutable class

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You should first have an instance of Cabin created by using
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Calling a method from an abstract class in a seperate class

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I have just looked over my program and realised my class names are not the most discriptive, so I have renamed them to give you a clearer picture.
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How to transfer photos from a MAC to a USB external storage drive?

How to transfer photos from a MAC to a USB external storage drive?

Just the Photos? Or the Library?
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Make sure the drive is formatted Mac OS Extended (Journaled)
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How to send BusinessEvent from oracle EBS 12 to an external JMS Queue/Topic

Hello Sir:
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Hello,
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Variable size array output from dynamic dispatch class method on FPGA

I have a Parent class on the FPGA that will serve as a template/framework for future code that will be developed. I had planned on creating a child class and overriding a couple methods. The child class constant would be dropped on the block diagram so the compiler wouldn't have any trouble figuring out which method (parent's or child's) should be used (i.e. the parent's method will never actually be used and won't be compiled with the main code). The output of one of the methods is an array. This array will have a different size depending on the application. I defined the array size as variable. In the child method, there is no question about the size of the array so the compiler should be able to figure it out. However, when I try to compile, I get an error about the array size. I can't figure out any way around it. Any thought would be greatly appreciated!
Thanks, Patrick
Solved!
Go to Solution.
Attachments:
FPGA Test.zip ‏1194 KB

Wait what?
Can we use dynamic dispatch VIs on FPGA? Really? I was completely unaware of this. Obviously the dependencies need to be constant and known at compile time but...... This would have saved me a lot of headaches in the last few months.
Since which LV version is this supported?
Say hello to my little friend.
RFC 2323 FHE-Compliant

How to use methods from a JAR file inside my springcontext (Oracle fusion 12c) class file?

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I have found the answer... as described in:
http://java.sun.com/javase/6/docs/technotes/guides/lang/resources.html
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The truth is that it tries to load with the getRessources methods and if it fails tries with the findClass/loadClass.
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How to invoke method from swing

Aloha,
Thanks in advance for help...
I have created GUI, and want to use buttons to choose which Physics problem to solve. I have already coded the Physics in .java and have different methods for each one. I would like for the button to create an action that places the different problems on the panel, each with a section for information, given input and outputting the answers to solve for.
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When I use the above command, it invokes the method, but not on the GUI panel, it comes up on the DOS screen. What command should I use to place the calculations and information for this method on the GUI? I know I need to separate and create areas of the panel for input, etc. But I want the method to take place on the GUI.
Thank you for your time and energy.

Hi - I have a question now regarding using a single button, to collect data from multiple fields, make calculations and then return figures to multiple fields.
I thought I could read them into two different variables (valueIn, valueIn2, etc) and then apply them to the JTextField variables. I was experimenting with just passing the initial figures without making calculations...
But just trying with two different fields, the compiler gives me an error for an "unreachable statement". How do I collect from multiple sources and return separate answers to different fields?
I tried to look up definitions for compiler messages, but couldn't find anything regarding "unreachable statements". Therefore, I would also appreciate any suggestions about a dependable source to reference errors.
Thank you in advance for your assistance, I am attaching copy of code below...
public class ChoiceFrame extends JFrame implements ActionListener
{ // [1]
     SolveIt converter = new SolveIt();
     public static final int WIDTH = 650;
public static final int HEIGHT = 500;
private JTextArea infoText;
private double valueIn = 0;
private double valueIn2 = 0;
private JTextField cliffHt;
private JTextField deceleration;
private JTextField timeFlight;
private JTextField height;
public static void main(String[] args)
{ // [2]
          ChoiceFrame myWindow = new ChoiceFrame();
          myWindow.setVisible(true);
     } // [2]
     public ChoiceFrame()
     { // [3]
          super( );
          setSize(WIDTH, HEIGHT);
          setTitle("ChoiceFrame");
          Container contentPane = getContentPane();
          contentPane.setBackground(Color.BLUE);
          contentPane.setLayout(new BorderLayout());
          addWindowListener(new WindowDestroyer());
          JMenu memoMenu = new JMenu("File");
    JMenuItem file;
    file = new JMenuItem("Clear");
    file.addActionListener(this);
    memoMenu.add(file);
    file = new JMenuItem("Exit");
    file.addActionListener(this);
    memoMenu.add(file);
    JMenuBar mBar = new JMenuBar( );
    mBar.add(memoMenu);
    setJMenuBar(mBar);
          JPanel northPanel = new JPanel();
          northPanel.setLayout(new BorderLayout());
          JPanel textPanel = new JPanel();
    northPanel.add(textPanel, BorderLayout.WEST);
          infoText = new JTextArea (8, 43);
          infoText.setBackground(Color.WHITE);
          infoText.setLineWrap(true);
          textPanel.add(infoText);
    infoText.setText("The Coyote, in his relentless attempt to catch the elusive Road Runner,\nloses his footing and falls from a sheer cliff ___ meters above the ground.\nAfter falling for __ seconds (without friction), the Coyote remembers that\nhe is wearing his Acme rocket-powered backpack, which he immediately turns on.\nThe Coyote makes a gentle landing (zero velocity) on the ground below,\nbut is unable to turn off the rocket, and is immediately propelled back up into the air.\n___ seconds after leaving the ground, the rocket runs out of fuel.\nAfter continuing upwards for a ways, the poor Coyote plunges back to the ground.");
          JPanel inputPanel = new JPanel();
    northPanel.add(inputPanel, BorderLayout.EAST);
          inputPanel.setLayout(new GridLayout(3,2));
          cliffHt = new JTextField(5);
          inputPanel.add(cliffHt);
          JLabel mtrsLabel = new JLabel("meters");
          inputPanel.add(mtrsLabel);
          JTextField secondsf = new JTextField(5);
          inputPanel.add(secondsf);
          JLabel sfLabel = new JLabel("seconds falling");
          inputPanel.add(sfLabel);
          timeFlight = new JTextField(5);
          inputPanel.add(timeFlight);
          JLabel sFlightLabel = new JLabel("seconds in flight");
          inputPanel.add(sFlightLabel);
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          southPanel.setLayout(new BorderLayout());
          JPanel buttonPanel = new JPanel();
          buttonPanel.setLayout(new FlowLayout());
          JButton calcButton = new JButton("Calculate");
          calcButton.addActionListener(this);
          buttonPanel.add(calcButton);
          southPanel.add(buttonPanel, BorderLayout.NORTH);
          JPanel outputPanel = new JPanel();
     outputPanel.setLayout(new GridLayout(3,2));
          JLabel decelLabel = new JLabel("With the rocket backpack turned on, the deceleration is: ");
          outputPanel.add(decelLabel);
          deceleration = new JTextField(10);
          outputPanel.add(deceleration);
          JLabel htLabel = new JLabel("the max height is: ");
          outputPanel.add(htLabel);
          height = new JTextField(10);
          outputPanel.add(height);
          JLabel vLabel = new JLabel("the velocity is: ");
          outputPanel.add(vLabel);
          JTextField velocity = new JTextField(10);
          outputPanel.add(velocity);
       southPanel.add(outputPanel, BorderLayout.CENTER);
          contentPane.add(northPanel, BorderLayout.NORTH);
          contentPane.add(southPanel, BorderLayout.CENTER);
     } // [3]
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     { // [20]
          String actionCommand = e.getActionCommand();
          if (e.getActionCommand().equals("Calculate"))
                    deceleration.setText(Quiz1());
                    height.setText(Quiz1());
          else if (e.getActionCommand().equals("Close"))
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          else if (actionCommand.equals("Exit"))
      System.exit(0);
     } //[20]
     private String Quiz1()
     { // [40]
          SolveIt calculate = new SolveIt();
          double gravity = 9.81;
          double initialSpeed = 0;
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          valueIn = stringToDouble(cliffHt.getText());
          return Double.toString(valueIn);
          valueIn2 = stringToDouble(timeFlight.getText());
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     } // [40]
     private static double stringToDouble(String stringObject)
     { // [30]
          return Double.parseDouble(stringObject.trim());
     } // [30]

Calling a method from a different class?

Ok..
I been trying for hours... but im stumped.
How can I get this to work?
(Note: I cut this code down from over 600+ lines of code.. I left in a REALLY raw framework that shows where the basic problem is.)
public class Client extends JPanel implements Runnable {
// variable declarations...
    Socket connection;
    BufferedReader fromServer;
    PrintWriter toServer;
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// GUI creation...
// Create the login JFrame
    Login login = new Login()
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            connection = new Socket(ip,port);
            fromServer = new BufferedReader(new InputStreamReader(connection.getInputStream()));
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            new Thread (this).start();
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class Login extends JFrame {
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}

Your posted code shows Login as an inner class. So one way to solve your problem is.
1. Make an instance variable to hold the instance. For example, after "PrintWriter toServer;" add "private Client client;"
2. In the Client constructor, add a line "client = this;"
3. In the Login actionPerformed(), use "client.connect();"
Another way is to have Login keep a reference to the Client that created it.
1. Add an instance variable to Login "private Client client;"
2. Change the Login constructor "public Login(Client c) {"
3. Add a line in the constructor "client = c;"
4. In the actionPerformed() "client.connect();"

How to delete data from dynamic internal table

Hi,
I have dynamic internal table and I have some slection screen fields , using these selection screen fields
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Hi matt,
I tried with below code as you said. But I am getting dump. can you help?
here is my piece of code.
FIELD-SYMBOLS: <LS_DATA> type any,
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UNASSIGN <L_FIELD>.
ASSIGN COMPONENT 'BELNR' OF STRUCTURE <LS_DATA> TO <L_FIELD>.
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ENDLOOP.
and here is the description of my dump:->>>
You attempted to access an unassigned field symbol
(data segment 32772).
This error may occur for any of the following reasons:
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Using main class's methods from a different class in the same file

Hi guys. Migrating from C++, hit a few snags. Hope someone can furnish a quick word of advice here.
1. The filename is test.java, so test is the main class. This code and the topic title speak for themselves:
class SomeClass
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          System.out.println(test.SomeOperation());
public class test
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2. No sense opening a second topic for this, so second question: Similarly, is there a good way to refer to System.out.println without the System.out.? Like the using keyword in C++.
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pfiinit wrote:
The code works fine. What I want to know is, is there some way to use test.SomeOperation() from SomeClass without the test.?Yes you can by using a static import, but I don't recommend it. SomeOperation is a static method of the test class, and it's best to call it that way so you know exactly what your code is doing here.
2. No sense opening a second topic for this, so second question: Similarly, is there a good way to refer to System.out.println without the System.out.? Like the using keyword in C++.Again, you could use static imports, but again, I don't recommend it. Myself, I use Eclipse and set up its template so that when I type sop it automatically spits out System.out.println(). Most decent IDE's have this capability.
Also, you may wish to look up Java naming conventions, since if you abide by them, it will make it easier for others to understand your code.
Much luck and welcome to this forum!

How to override methods from dynamic instaniated class to call externally?

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