Go through the question of the value

I understand that in Java, all arguments are passed by value. There is no pass by reference. But there is something that still confuses me.

public static void main(String[] args) {
          
          int array[] = {1, 2, 3, 4, 5};
          
          modifyElement(array[3]);

                modifyArray(array);
          
          
     }


static void modifyElement(int element){
          element *= 2;
     }



static void modifyArray(int array2[]){
          for(int i = 0; i < array2.length; i++){
               array2[i] *= 2;
          }
     }
     
The call
 modifyElement(array[3]);
modifies the copy of table [3]. It does not change real table [3] because we pass by value. Am I wrong?

Whereas, after the call
 modifyArray(array);
the report initial array [] = {1, 2, 3, 4, 5} becomes array [] = {2, 4, 6, 8, 10}

Why and how this is happening because it is only through the value of the arguments?

Thanks in advance to everyone.

blias says:

793437 wrote:

public class Foo {
public static void main(String[] args) {
int x = 123;
String y = "abc";
bar(x, y);
}

public static bar(int x, String y) {
// do stuff
}
}

Yes, here, is the appellant or appellant the main() method, and the method called is bar().

-jv

Thanks for the quick response, jverd. It's getting a bit messy in my head regarding the call of method, called method, copy of the etc object reference... The book I am a student of confuses me sometimes.

I have to reread all the responses here (Finally, except for Jimmy) and I hope that I'd get all about Java through the concept of value.

Thanks again for all the help.

It's actually pretty simple. In the light of the foregoing, the main() method calls the method main() bar() is therefore the appellant or the method call and bar() is called or called the method. When it does, it passes two parameters by value - an int, a reference to a string. This means that when main() calls bar (x, y), it copies the value of the x bar x and copy the value of the sound bar x y to y. main () has a value of 123, so the value 123 is copied into the parameter bar() knows than x. y hand () has a value of reference-to-a-particular-String-object, so the value of this reference - essentially a way of locating this particular object of the string - is copied into the parameter knows that bar() y. There are now two variables x completely different and independent and two are totally different and independent. Changing the int value stored in a variable x (x = Gisèle ;) will not affect the other variable x. changes to the reference value stored in the variable of a y - that is to say change what String object it points to (y = Gisèle ;) will not affect the other variable y.))

Who is?

Tags: Java

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                Logger.getLogger(TabInboxController.class.getName()).log(Level.SEVERE, ex.getMessage(), ex);
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        Pos position;
        Object object;
    
        public CheckboxTableCellFactory(Pos thisPosition, Object thisObject) {
            this.position = thisPosition;
            this.object = thisObject;
        }
    
        @Override
        public TableCell call(TableColumn arg0) {
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            checkBox.setUserData(object);
            TableCell tableCell = new TableCell() {
    
                @Override
                public void updateItem(Object item, boolean empty) {
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                    }
                }
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    import java.io.Serializable;
    import java.util.ArrayList;
    import javafx.beans.property.*;
    
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        private BooleanProperty pending = new SimpleBooleanProperty(this, "pending");
        private BooleanProperty addToHome = new SimpleBooleanProperty(this, "addToHome");
    
        public String getBillId() {
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        }
    
        public void setBillId(String billId) {
            this.billId.set(billId);
        }
    
        public final StringProperty billIdProperty() {
            return billId;
        }
    
        public boolean getPending() {
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        }
    
        public void setPending(boolean pending) {
            this.pending.set(pending);
        }
    
        public final BooleanProperty pendingProperty() {
            return pending;
        }
    
        public boolean getAddToHome() {
            return addToHome.get();
        }
    
        public void setAddToHome(boolean addToHome) {
            this.addToHome.set(addToHome);
        }
    
        public final BooleanProperty addToHomeProperty() {
            return addToHome;
        }
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    I'm sure that I'm missing out on a minor addition. Any hint on solving this would be appreciated.

    Thank you.

    Hello Florent.
    I have not read all your codes but from the title of your question. I think that you are not been able to get the status of the Update checkbox. To obtain the present value of checkbox, you must update 'OBJECTS' tableview to plant cells check box. For the State of the elements of this update...

    SIMPLE ALGORIGTHM
    -CLICK EVENT IS PAST IN THE CELL (BOX)
    -FUNCTION CELL_FACTORY TRIGGERS
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    -UPDATE THE TABLE VIEW "ITEMS" WITH AND UPDATE THE SPECIFIC INDEX
    -THE CHANGES WILL HAPPEN THIS WAY

    Thank you
    Narayan

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