How to return a boolean in a method?

I have
public int isEven(int num1, int num2)
          boolean even;
          if (((num1 + num2)%2)==0)
               even = true;
          else
               even = false;
          return even;
     }however, it tells me that the return are incompatible types and that an int is required instead of the boolean value.
But when I recall the method I need it to return a boolean not an int >.<
How do I get the method to return a boolean value so it will work with the following code in my main
     if (myGeek.isEven(num1,num2))
System.out.println("Sum of " + num1 + " +" + num2 + " is even");
     else
System.out.println("Sum of " + num1 + "+" + num2 + " is not even");

change
public int isEven(int num1, int num2)to
public boolean isEven(int num1, int num2)get it?Awwwwwww, you stole my thunder. : (

Similar Messages

How to return a object from a method in a java program to a C++ call (JNI )

Sir,
I am new to java and i have been assigned a task to be done using JNI.
My question is,
How can i return an object from a method in a java program to a call for the same method in a C++program using JNI.
Any help or suggesstions in this regard would be very useful.
Thanking you,
Anjan Kumar

Hello
I would like to suggest that JNI should be your last choice and not your first choice. JNI is hard to get right. Since the JNI code is executing in the same address space as the JVM, any problems (on either side) will take down the entire process. It dilutes the Write Once Run Anywhere (WORA) value proposition because you need to provide the JNI component for all hardware/OS platforms. If you can keep your legacy code(or whatever you feel you need to do in JNI) in a separate address space and communicate via some inter-process channel, you end up with a system that is more flexible, portable, and scalable.
Having said all that, head over to the Java Native Interface: Programmer's Guide and Specification web page:
http://java.sun.com/docs/books/jni/
Scroll down to the Download the example code in this book in ZIP or tar.gz formats. links and download the example source. Study and run the example sources. The jniexamples/chap5/MyNewString demo creates a java.lang.String object in native code and returns it to the Java Language program.

How to return an internal table with methods ?

Hi,
I am an Java programmer and very new to ABAP.
How do I return a internal table with a method? I have the table GP1_PRODUCTS and want to return a copy of this table as an internal table called PRODUCTS.
Here is my code that does not work:
class PRODUCTS definition
public
final
create public .
public section.
*"* public components of class PRODUCTS
*"* do not include other source files here!!!
methods GET_PRODUCT_LIST
    returning
      value(PRODUCTS) type GP1_PRODUCTS .
protected section.
*"* protected components of class PRODUCTS
*"* do not include other source files here!!!
private section.
*"* private components of class PRODUCTS
*"* do not include other source files here!!!
ENDCLASS.
CLASS PRODUCTS IMPLEMENTATION.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method PRODUCTS->GET_PRODUCT_LIST
* +-------------------------------------------------------------------------------------------------+
* | [<-()] PRODUCTS                       TYPE        GP1_PRODUCTS
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_PRODUCT_LIST.
DATA: it_products TYPE STANDARD TABLE OF GP1_PRODUCTS.
select * from GP1_PRODUCTS into table it_products.
PRODUCTS = it_products.
endmethod.
ENDCLASS.

You have to create a table type for your table GP1_PRODUCTS.
If you use global class (created in SE24), than:
Create a Table Type in SE11
Go to SE11, Enter a name like ZPRODUCTS in the Data Type
There will be popup when you press the Create button to decide a type. Select the Table Type
Enter GP1_PRODUCTS in the Line Type.
* method declaration
methods GET_PRODUCT_LIST
    returning
      value(PRODUCTS) type ZPRODUCTS.
If you use local class:
TYPES: ty_products type standard table of GP1_PRODUCTS..
* method declaration
methods GET_PRODUCT_LIST
    returning
      value(PRODUCTS) type ty_products
Regards,
Naimesh Patel

How to return 2 value to a method and how can i get the return value?

hi guys, this is my problem.
private void one(){
two();
private Vector, Vector two(){
return(row, column);
the problem is that I don't know how to call the two() method and return from two() to one().
please help me, i'm very new to programming........
liml

the problem is that I don't know how to call the two()
method and return from two() to one()You can doprivate Vector[] two () {
    return new Vector[] {
        row,
        column
} // as suggested
private void one () {
    Vector[] rowAndColumn = two ();
    Vector row = rowAndColumn[0];
    Vector column = rowAndColumn[1];
}You should consider replacing your Vector with an ArrayList, btw.
Kind regards,
  Levi

How to Create a Jdialog class that returns a boolean parameter

I'm trying to subclass a jdialog to return a boolean to another callling class, the parameter is return when the jdialog closes, how do i declare such a class and what method do i call on the windowclosed event
I'm new to java so need some code sample, the program is to implement a login and password verification.
thanks in advance for any assistance.

Here's another way (a third way is to make the dialog form an inner class)
in this eg, the password is hard-coded as java
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class MainWindow extends JFrame
JLabel lbl = new JLabel("JLabel");
JButton btn = new JButton("JButton");
boolean loggedInOK = false;
public MainWindow()
    new FTILogin_Jdia2(this, true).show();
    if(!loggedInOK) System.exit(0);
    buildGUI();
public void buildGUI()
    setLocation(400,300);
    setSize(150,85);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new BorderLayout());
    jp.add(lbl,BorderLayout.NORTH);
    jp.add(btn,BorderLayout.SOUTH);
    getContentPane().add(jp);
    setVisible(true);
public static void main(String[] args){new MainWindow();}
class FTILogin_Jdia2 extends javax.swing.JDialog implements ActionListener
JTextField tf = new JTextField(10);
String password = "java";
MainWindow mainWindow;
public FTILogin_Jdia2(MainWindow parent, boolean modal)
    setModal(modal);
    mainWindow = parent;
    initComponents();
public void initComponents()
    setLocation(400,300);
    getContentPane().setLayout(new BorderLayout());
    JPanel top = new JPanel();
    top.add(new JLabel("Password: "));
    top.add(tf);
    getContentPane().add(top,BorderLayout.NORTH);
    JButton btn = new JButton("OK");
    btn.addActionListener(this);
    getContentPane().add(btn,BorderLayout.SOUTH);
    pack();
public void actionPerformed(ActionEvent e)
    if(tf.getText().equals(password))
      mainWindow.loggedInOK = true;
    dispose();
[/code

How do I return a Boolean array from LabView to TestStand?

I am trying to return a Boolean array from Labview to TestStand and have TS evaluate the results. I can do this for arrays of integers or reals but booleans do not work. I tried copying the PassFailTest step type and adding an array of Bool but I couldn't get it to evaluate the array. It simply always passed. How can this be done?
Bob A.

I have thought about evaluating the Boolean data in TestStand but, as you say, this is a lot of work. What I have been doing is to map the boolean data to integers in LV (very easy) and then use the multiple numeric step type to evaluate the integer array automatically. This feels kludgy and I have tried a couple of times to create a "multiple boolean" step type with little success. I'm surprised TS hasn't anticipated a test returning multiple pass/fail results. I do this all the time for production code.
What I have tried is to copy MultipleNumericLimitsTest data type to a custom type and add a BooleanArray with a data type Array of Boolean[0..empty]. Then when I specify module, I select Step.BooleanArray as the value. The last step (that I know of) is to select Step.BooleanArray as the data source in the edit limits window. At this point if I run the test, I get the error "expect numeric, found boolean" (or something similar). When I look at the properties of my custom step type, the Substeps has DoMultiNumericMeasEvaluation as the Post-Step. I believe this is the root of my problem but I can't figure out how to change this to "DoMultiBooleanMeasEvaluation" or similar. Any Ideas?

How to return more than one varibles from a method?

can you use the codes:
return var1, var2,var3;
If not, what is the correct way to do so? thanks.

You can only return 1 object from a method in Java.
However, this 1 object can contain multiple other objects. For example, a Vector object:
public Vector someMethod() {
    Vector v = new Vector();
    v.add("abc");
    v.add("xyz");
    v.add("123");
    return v;
}If these multiple objects are the same type, you can also use array to achieve want you want.
public String[] someMethod() {
    String ss = new String[3];
    ss[0] = "abc";
    ss[1] = "xyz";
    ss[2] = "123";
    return ss;
}--lichu

To scan a method boolean in another method

how can i scan a boolean in another method if its true, which parameters should i take..
because the same parameter like in the boolean method leads to the error X,Y cannot be resolved..
public boolean istPunktEnthalten(int X,int Y){
          if (X>=x1 && X<=x2 && Y>=y1 && Y<=y2 ){
                return true;
          return false;
     Rechteck vereinigung(Rechteck r){
               if (istPunktEnthalten(X,Y)){      -------------->X,Y cannot be resolved, so whici param i need?
                    return r;
               }

First off, I would simplify the method like so:
public boolean istPunktEnthalten(int X,int Y)
    return (X>=x1 && X<=x2 && Y>=y1 && Y<=y2 );
}Next of all, when you call it, you don't use X, Y, you use ints or variables that hold ints:
int a = 1;
int b = 2;
System.out.println(istPunktEnthalten(a, b));

Not sure on how to return a new object

hi i am not sure on how to return a new Set object, i am not asking how to code this, i just don't exactly know what to write after "return.." to return a new object ...that part of the code is towards the bottom where i put arrows.....this is the skeleton of the code:
public class Set
     // define fields here
     public Set(int maxinteger)
          // complete this method
     public boolean add(int integer)
          return false; // replace this line with your code
     public boolean remove(int integer)
          return false; // replace this line with your code
     public boolean contains(int integer)
          return false; // replace this line with your code
     public int size()
          return 0; // replace this line with your code
     public String toString()
          return null; // replace this line with your code
     public void addAll(Set other)
          // complete this method
--------->     public Set subset(int min, int max)
          return null; // replace this line with your code
----------->     public Set intersection(Set other)
          return null; // replace this line with your code
------------->     public Set difference(Set other)
          return null; // replace this line with your code
     }

well, when you use return is when trying to make a method have a value that have to be returned from it.
In your case you have a Set CLASS, with methods, some methods have to return Strings, ints, Objects, etc.
just make sure that you are returning the same type of value than the method say.
the method parts are:
modifier returnType name (parameters) {
. code
modifiers are public, private, etc.
the return type specifies what the method will return, for example:
public String toString () {
must return a String value.
to return a new Object just do it like a simple value, Strings are objects.
just define a Set object and then return it.

[UIX] How To: Return multiple values from a LOV

Hi gang
I've been receiving a number of queries via email on how to return multiple items from a LOV using UIX thanks to earlier posts of mine on OTN. I'm unfortunately aware my previous posts on this are not that clear thanks to the nature of the forums Q&A type approach. So I thought I'd write one clear post, and then direct any queries to it from now on to save me time.
Following is my solution to this problem. Please note it's just one method of many in skinning a cat. It's my understanding via chatting to Oracle employees that LOVs are to be changed in a future release of JDeveloper to be more like Oracle Forms LOVs, so my skinning skills may be rather bloody & crude very soon (already?).
I'll base my example on the hr schema supplied with the standard RDBMS install.
Say we have an UIX input-form screen to modify an employees record. The employees record has a department_id field and a fk to the departments table. Our requirement is to build a LOV for the department_id field such that we can link the employees record to any department_id in the database. In turn we want the department_name shown on the employees input form, so this must be returned via the LOV too.
To meet this requirement follow these steps:
1) In your ADF BC model project, create 2 EOs for employees and departments.
2) Also in your model, create 2 VOs for the same EOs.
3) Open your employees VO and create a new attribute DepartmentName. Check selected in query. In expressions type (SELECT dept.department_name FROM departments dept WHERE dept.department_id = employees.department_id). Check Updateable always.
4) Create a new empty UIX page in your ViewController project called editEmployees.uix.
5) From the data control palette, drag and drop EmployeesView1 as an input-form. Notice that the new field DepartmentName is also included in the input-form.
6) As the DepartmentName will be populated either from querying existing employees records, or via the LOV, disable the field as the user should not have the ability to edit it.
7) Select the DepartmentId field and delete it. In the UI Model window delete the DepartmentId binding.
8) From the data controls palette, drag and drop the DepartmentId field as a messageLovInput onto your page. Note in your application navigator a new UIX page lovWindow0.uix (or similar) has been created for you.
9) While the lovWindow0.uix is still in italics (before you save it), rename the file to departmentsLov.uix.
10) Back in your editEmployees.uix page, your messageLovInput source will look like the following:
<messageLovInput
    model="${bindings.DepartmentId}"
    id="${bindings.DepartmentId.path}"
    destination="lovWindow0.uix"/>Change it to be:
<messageLovInput
    model="${bindings.DepartmentId}"
    id="DepartmentId"
    destination="departmentsLov.uix"
    partialRenderMode="multiple"
    partialTargets="_uixState DepartmentName"/>11) Also change your DepartmentName source to look like the following:
<messageTextInput
    id=DepartmentName
    model="${bindings.DepartmentName}"
    columns="10"
    disabled="true"/>12) Open your departmentsLov.uix page.
13) In the data control palette, drag and drop the DepartmentId field of the DepartmentView1 as a LovTable into the Results area on your page.
14) Notice in the UI Model window that the 3 binding controls have been created for you, an iterator, a range and a binding for DepartmentId.
15) Right click on the DepartmentsLovUIModel node in the UI Model window, then create binding, display, and finally attribute. The attribute binding editor will pop up. In the select-an-iterator drop down select the DepartmentsView1Iterator. Now select DepartmentName in the attribute list and then the ok button.
16) Note in the UI Model you now have a new binding called DCDefaultControl. Select this, and in the property palette change the Id to DepartmentName.
17) View the LOV pages source, and change the lovUpdate event as follows:
<event name="lovSelect">
    <compound>
        <set value="${bindings.DepartmentId.inputValue}" target="${sessionScope}" property="MyAppDepartmentId" />
        <set value="${bindings.DepartmentName.inputValue}" target="${sessionScope}" property="MyAppDepartmentName" />
    </compound>
</event>18) Return to editEmployees.uix source, and modify the lovUpdate event to look as follows:
<event name="lovUpdate">
    <compound>
        <set value="${sessionScope.MyAppDepartmentId}" target="${bindings.DepartmentId}" property="inputValue"/>
        <set value="${sessionScope.MyAppDepartmentName}" target="${bindings.DepartmentName}" property="inputValue"/>
    </compound>
</event>Thats it. Now when you select a value in your LOV, it will return 2 (multiple!) values.
A couple things to note:
1) In the messageLovInput id field we dont use the .path notation. This is mechanism for returning 1 value from the LOV and is useless for us.
2) Again in the messageLovInput we supply _uixState as an entry in the partialTargets.
3) We are relying on partial-page-refresh functionality to update multiple items on the screen.
Im not going to take the time out to explain these 3 points, but its worthwhile you learning more about them, especially the last 2, as a separate exercise.
One other useful thing to do is, in your messageLovInput, include as a last entry in the partialTargets list MessageBox. In turn locate the messageBox control on your page (if any), and supply an id=MessageBox. This will allow the LOV to place any errors raised in the MessageBox and show them to the user.
I hope this works for you :)
Cheers,
CM.

Thanks Chris,
It took me some time to find the information I needed, how to use return multiple values from a LOV popup window, then I found your post and all problems were solved. Its working perfectly, well, almost perfectly.
Im always fighting with ADF-UIX, it never does the thing that I expect it to do, I guess its because I have a hard time letting go of the total control you have as a developer and let the framework take care of a few things.
Anyway, I'm using your example to fill 5 fields at once, one of the fields being a messageChoice (a list with countries) with a LOV to a lookup table (id , country).
I return the countryId from the popup LOV window, that works great, but it doesn't set the correct value in my messageChoice . I think its because its using the CountryId for the listbox index.
So how can I select the correct value inside my messageChoice? Come to think of it, I dont realy think its LOV related...
Can someone help me out out here?
Kind regards
Ido

How do I call an Application Module method from a EntityImpl class?

Guys and Gals,
Using Studio Edition Version 11.1.1.3.0.
I've got a price update form, that when submitted, takes the part numbers and prices in the form and updates the corresponding Parts' price in the Parts table. Anytime this Parts view object's ReplacementPrice attribute is changed, an application module method needs to be called which updates a whole slew of related view objects. I know you can modify view objects via associations (How do I call an Application Module method from a ViewObjectImpl class? but that's not what I'm trying to do. These AppModuleImpl methods are the hub for all price updates, as many different operations may affect related pricing (base price lists, price buckets, etc) and hence, call the updatePartPricing(key) method.
For some reason, the below code does not call / run / activate the application module's method. The AppModuleDataControl exists and recordPartHistory(key) is registered and public. At runtime, the am.<method> code is simply ignored, and as a weird side-effect, I cannot navigate out of my current page flow.
public void setReplacementPrice(Number value)
    setAttributeInternal(REPLACEMENTPRICE, value);
    AppModuleImpl am = (AppModuleImpl)this.getDBTransaction().findApplicationModule("AppModuleDataControl");
    Key key = new Key(new Object[]
        { getPartNumber() });
    am.recordPartHistory(key); // AppModuleImpl method which records pricing history
    am.updatePartPricing(key); // AppModuleImpl method which updates a whole slew of related pricing tables
}Any ideas?

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.
You are correct. It is available from the ViewRow, but I thought it better to put it in the EntityImpl. This method will be called every time the replacement cost is modified. If I didn't put it in the EntityImpl, I'd have to remember to call it every time a replacement cost changed.

How to return jolt connection back to the joltpool?

hi
I used following codes to get joltconnection pool:
SessionPool sessionPool = sessionPoolManager.getSessionPool(poolName);
     DataSet request = new DataSet(requestString.length()*2);
     request.setValue("STRING", requestString);
     Result result = sessionPool.call(serviceName, request, null);
     return (String) result.getValue("STRING", null);
my question is : how to return jolt connection back to the joltpool? do I need
to do that?
when I used jdbc connection pool, I used conn.close() to return
to jdbc connection pool. Is there any method like "close()" in
jdbc connection?
Wei Jiang

Hi,
The below is the simple source code using Pool which it is extracted from
BEA's support web site.
and it is helpful.
The Pool doesn't need to return jolt connection back to the joltpool.
because it is done by Pool Manager automatically.
import bea.jolt.*;
import bea.jolt.pool.*;
public class Pho2 {
public static void main(String argv[])
try
String[] adresses = new String[1];
adresses[0] = "//aglaia:7040";
// creation du manager et du pool par defaut
SessionPoolManager sessionPoolManager = new SessionPoolManager();
int i = sessionPoolManager.createSessionPool(adresses, null, 1, 3, new
UserInfo(), null);
SessionPool sessionPool = sessionPoolManager.getSessionPool(null);
DataSet dataset = new DataSet();
Result result=null;
dataset.setValue("rhaine","coucou");
try
result = sessionPool.call("TOUPPER", dataset, null);
catch(Exception Ex)
System.out.println("session");
Ex.printStackTrace();
System.out.println("dataset="+dataset);
System.out.println("result ="+result);
System.out.println("ApplicationCode="+(new
Integer(result.getApplicationCode())).toString());
catch(Exception Ex)
System.out.println(Ex.getMessage());
Hope this helps.
Mr, Ko.
"wei jiang" <[email protected]> wrote in message
news:[email protected]..
>
hi
I used following codes to get joltconnection pool:
SessionPool sessionPool = sessionPoolManager.getSessionPool(poolName);
DataSet request = new DataSet(requestString.length()*2);
request.setValue("STRING", requestString);
Result result = sessionPool.call(serviceName, request, null);
return (String) result.getValue("STRING", null);
my question is : how to return jolt connection back to the joltpool? do Ineed
to do that?
when I used jdbc connection pool, I used conn.close() to return
to jdbc connection pool. Is there any method like "close()" in
jdbc connection?
Wei Jiang

AudiCLip.play should return a boolean value

Java Experts,
looks like it's a bug in java, the audioClip.play method should return a boolean value indicating whether it was able to play the clip or not. Because sometimes the method doesn't play anything. Right now the method plays asynchronously that may be the reason that it returns a void. Thoughts???
Q.

i agree with you..i also encountered this problem sometimes the play method doesn't play and the programmer has no clue to figure this out programmetically...Looks like this problem has no solution..where are java experts in this forum??

Conditional display: PL/SQL Function Body Returning a Boolean

Hi,
can anyone give me an example how to create a PL/SQL Function Body Returning a Boolean in the Conditional Display Section of a Region?
I have two Items on the Page and I want the region only be displayed when the two Items are not null....
Thanks,
tim

Also, I have seen some "null"-values of Selectlists being stored as '%null%' instead..
:P1_ITEM1 IS NOT NULL AND UPPER(:P1_ITEM1) != '%NULL%' AND :P1_ITEM2......
..might be helpful?
Cheers,
Vidar

Function with return type boolean

I have created a function with return type boolean as:
CREATE OR REPLACE FUNCTION fn RETURN BOOLEAN
AS
exp EXCEPTION;
BEGIN
return TRUE;
EXCEPTION
when OTHERS then RAISE exp;
END;
FUNCTION fn compiledThen I was trying to call this function into dbms_output.put_line procedure, I got this error:
EXECUTE DBMS_OUTPUT.PUT_LINE(fn);
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'Can someone please help me understand, why this happened?
Is this because of boolean return type?

952040 wrote:
I have created a function with return type boolean as:
Then I was trying to call this function into dbms_output.put_line procedure, I got this error:
EXECUTE DBMS_OUTPUT.PUT_LINE(fn);
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'
What is the parameter signature for DBMS_OUTPUT.put_line() ?
Is is string - as detailed in Oracle® Database PL/SQL Packages and Types Reference guide.
So how can you pass a boolean data type as parameter value, when the parameter's data type is string?
PL/SQL supports implicit data conversion. So you can for example pass a number or date value to DBMS_OUTPUT.put_line() - and the PL/SQL engine automatically (and implicitly) converts that (using the TO_CHAR() functions) to a string.
However, the TO_CHAR() parameter signature supports number and date - not boolean. It cannot convert a boolean value into a string.
So passing a boolean value means the implicit conversion fails - and results in the above error.
To make it work, you need to perform an explicit conversion. As as a data type conversion function from boolean to string is not available, you need to write a user defined function. E.g.
SQL> create or replace function BoolToChar( b boolean ) return varchar2 is
2 begin
3    case
4       when b then return( 'TRUE' );
5       when not b then return( 'FALSE' );
6    else
7      return( null );
8    end case;
9 end;
10 /
Function created.
SQL>
SQL> exec DBMS_OUTPUT.put_line( 'Flag is '||BoolToChar(true) );
Flag is TRUE
PL/SQL procedure successfully completed

How to return a boolean in a method?

Similar Messages

Maybe you are looking for