Incompatible Types in Assignment for CGPoint

hey i'm new to this and i'm not sure why i keep getting this problem.
TrainerViewController.h file:
#import <UIKit/UIKit.h>
@interface TrainersViewController : UIViewController {
IBOutlet UIButton *upMovementButton;
IBOutlet UIButton *downMovementButton;
IBOutlet UIButton *leftMovementButton;
IBOutlet UIButton *rightMovementButton;
IBOutlet UIButton *jumpMovementButton;
IBOutlet UIImageView *character;
CGPoint *characterVelocity;
NSTimer *_moveLeft;
NSTimer *_moveRight;
NSTimer *_moveJump;
@property(nonatomic,retain) IBOutlet UIButton *upMovementButton;
@property(nonatomic,retain) IBOutlet UIButton *downMovementButton;
@property(nonatomic,retain) IBOutlet UIButton *leftMovementButton;
@property(nonatomic,retain) IBOutlet UIButton *rightMovementButton;
@property(nonatomic,retain) IBOutlet UIButton *jumpMovementButton;
@property(nonatomic,retain) IBOutlet UIImageView *character;
@property(nonatomic) CGPoint *characterVelocity;
@property(nonatomic,retain) NSTimer *_moveLeft;
@property(nonatomic,retain) NSTimer *_moveRight;
@property(nonatomic,retain) NSTimer *_moveJump;
- (IBAction)characterMoveRightStart;
- (IBAction)characterMoveRightStop;
- (IBAction)characterMoveLeftStart;
- (IBAction)characterMoveLeftStop;
@end
TrainersViewController.m file:
#import "TrainersViewController.h"
#define gravityAcceleration 1
#define characterSpeedX 10
#define characterSpeedY 15
@implementation TrainersViewController
@synthesize character,leftMovementButton,rightMovementButton,downMovementButton,upMovementButton,jumpMovementButton,moveLeft,_moveRight,moveJump;
@synthesize characterVelocity;
- (void)viewDidLoad {
[super viewDidLoad];
characterVelocity = CGPointMake(characterSpeedX, characterSpeedY);
/*[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(gameLoop) userInfo:nil repeats:YES];*/

CGPointMake return a CGPoint while characterVelocity is of type CGPoint*, one is a struct the other is a pointer.

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Incompatible types in assignment

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This is just a warning so it does not mean that your process will fail, e.g. string to decimal may work for the string holds a number, but will fail if it has a string.
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thank you. here's the code.
import java.io.*;       // needed for stream readers
import java.lang.*;
public class testScores extends Object
     public static void main(String args[] ) throws Exception
     // declare variables for input
        String      records;
        String      room_nbr_input;
        String      test_score_input;
        String      student_id;
        int             room_nbr_nbr;
        int             test_score_nbr;
        int          index;
        String[] record = new String[3];
        int[]      room_nbr = new int[30];
        int[]       test_score = new int[30];
        int[]      kount = new int[30];
          // created file reader and buffered reader
          FileReader frM;
          BufferedReader brM;
          // open file
          frM = new FileReader("einstein_testscores_2009.txt");
          brM = new BufferedReader(frM);
     // print headings
          startUp();
          // get one record from file
          records = brM.readLine();
          while(records !=null)
          //split the record into three fields = the array record[], then assign those values to variables
          record = records.split(", ");
          student_id = record[0];
          room_nbr_input = record[1];
          test_score_input = record[2];
          //change the data into integers
          room_nbr_nbr = Integer.parseInt(room_nbr_input);
          test_score_nbr = Integer.parseInt(test_score_input);
          //put the variables into arrays
          room_nbr[room_nbr_nbr -1] = room_nbr_nbr;
          test_score[room_nbr_nbr -1] = test_score[room_nbr_nbr -1] + test_score_nbr;
          //get new record
          records = brM.readLine();
           for (index = 0; index = room_nbr.length; index++)
                System.out.print(room_nbr[index] + "\t\t" + test_score[index]);
     public static void startUp()
     System.out.print("Einstein Elementary Test Scores\n\n");
     System.out.print("Room Number\t\tTest Score Average\n\n");
}          // end of class declaration

Account assignment for Movt type 101 and 501

All SAP Gurus,
We want to do the account assignment for movt types 101, 102, 122, 123, 201, 202, 261, 262 accourding to the movement types.
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Regards,

To know this first you have to know what does the different general modifications means for GBB:
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Then go and check OMWN.
Regards,
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Actually routing has no relation to order type.
You can use Production Scheduling Profile as well as Production Scheduler/Supervisor.
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Navigate to Work Structures -> Status and query for all rows with system status Terminated Assignment. select your required assignment status as Default. Untick the other default.

[SOLVED] XSD simpleType trying to assign incompatible types

Hi all!
I have a big XSD schema with complex and simple types defined. One of the simple types looks like this (string with min and max length defined):
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instead of using a variable assignment use the expression builder to construct the 'bpws:getVariableData() equivalent of the variable assignment. The warning will no longer exist.

Invalid type assigned for CMR field

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What parameter do you pass to the method when you are setting the relationship? Collection of which objects? You should pass a collection of local interfaces.
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Incompatible types - found java.lang.String but expected int

This is an extremely small simple program but i keep getting an "incompatible types - found java.lang.String but expected int" error and dont understand why. Im still pretty new to Java so it might just be something stupid im over looking...
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Lab
public static void main(String []args)
int input = JOptionPane.showInputDialog("Input Decimal ");
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}

You should always post the full, exact error message.
Your error message probably says that the error occurred on something like line #10, the JOptionPane line. The error is telling you that the compiler found a String value, but an int value was expected.
If you go to the API docs for JOptionPane, it will tell you what value type is returned for showInputDialog(). The value type is String. But you are trying to assign that value to an int. You can't do that.
You will need to assign the showInputDialog() value to a String variable. Then use Integer.parseInt(the_string) to convert to an int value.

Problem with incompatible types

Can you help me out where the problem is? The Child extends the Iterator<GenericTypeTest> so why the assignment doesn`t work? Thank you in advance
class GenericTypeTest implements Iterator<GenericTypeTest> {
    public GenericTypeTest() {
        Child a = null;
        Iterator<GenericTypeTest> b = null;
        b = a;
        Set<Child> sa = null;
        Set<Iterator<GenericTypeTest>> sb = null;
        sb = sa; // HERE: COMPILATION PROBLEM
        // (Incompatible types: found: Set<Child> required: Set<Iterator<GenericTypeTest>>)
    public boolean hasNext() {
        return false;
    public GenericTypeTest next() {
        return null;
    public void remove() {
class Child extends GenericTypeTest {}

You can only assign from a subtype to a supertype. And the subtype/supertype relationship for generic types isn't what you think it is. Read this FAQ entry for more information, especially the part around the sentence "The prerequisite is that at least one of the involved type arguments is a wildcard."

Compatible & Incompatible types

Why is that I can assign a integer value to a double variable, but cannot assign a double value to an integer variable? Aren't double and integer compatible types? Isn't there a concept of truncation in java? I searched the net but in vain. I couldn't find the exact answer I was looking for. So I am posting in this forum.
PS: I understand it is not possible to assign an integer to a string since they are incompatible types.
Edited by: 964980 on Mar 26, 2013 9:29 PM

Why is that I can assign a integer value to a double variableBecause it's a widening conversion that doesn't lose any information. See JLS #5.1.2.
but cannot assign a double value to an integer variable?Because it's a narrowing conversion that might lose information. You can do it as long as you write an explicit typecast. See JLS #5.1.3.
Aren't double and integer compatible types?No, see above.
Isn't there a concept of truncation in java?Yes, see above.
@rp0428 I don't see what good asking for the code and the error message does, in a fundamental case like this. It doesn't change the answer, and your own answer (is/isn't) wasn't too inspiring.

Compiler error: incompatible types

When I try to compile this code it gives the error "incompatible types".
import java.util.ArrayList;
public class Poly {
     public static void main (String args[]) {
          Number integer = new Integer(1);
          ArrayList<Number> integers = new ArrayList<Integer>();
}Assigning a Number object an Integer which extends Number works fine.
But when I try to assign an ArrayList<Number> object an ArrayList<Integer> object it gives an imcompatible types error.
Shouldn't it work?
Edited by: aexyl93 on Jun 7, 2010 2:00 AM
Edited by: aexyl93 on Jun 7, 2010 2:05 AM

aexyl93 wrote:
Thanks for the quick replies.
I've never seen ArrayList<? extends obj> before.Nitpick: it's not "? extends obj" it's "? extends SomeClass".
"obj" kind of implies that you could use a variable/field here, which is wrong.
I thought it would be able to hold an object which extends what it's supposed to hold.A List<? extends Number> could contain any class that extends Number (as well as Number itself if it weren't an abstract class). However you can't add anything (except null), because you don't know the concrete type at this point.

Help on Incompatible types

Sample 1:
public interface I<T extends I<?>>
I<? extends I<T>> m1 ();
public class Z<T extends I<?>> implements I<T>
public I<? extends I<T>> m1 ()
    return m2();
protected I<? extends I<T>> m2 ()
    return null;
javac Z.javacompiled with no problems
Sample 2:
public interface I<Tx, T extends I<Tx, ?>>
I<Tx, ? extends I<Tx, T>> m1 ();
public class Z<Tx, T extends I<Tx, ?>> implements I<Tx, T>
public I<Tx, ? extends I<Tx, T>> m1 ()
    return m2();
protected I<Tx, ? extends I<Tx, T>> m2 ()
    return null;
javac Z.javaZ.java:5: incompatible types
found : I<Tx,capture of ? extends I<Tx,T>>
required: I<Tx,? extends I<Tx,T>>
return m2();
^
1 error
Well... can anyone help with this? Or at least some explanations why adding second generic generates this problem?

The problem is in the recursion, not in the second type argument. If you changed your first interface from
    public interface I<T extends I<?>> {} to
    public interface I<T extends I<T>> {} you would run into the same error message. For sake of clarity let's discuss the issue using your first example in a slightly simplified form:
    public interface I<T extends I<T>> {}
    public class Z<E>
      public I<? extends I<E>> m1 ()
        return m2();
        /* error: incompatible types
           found   : I<capture of ? extends I<E>>
           required: I<? extends I<E>>
           return m2();
                    ^
      protected I<? extends I<E>> m2 ()
      { return null; }
    }The error message is not awfully helpful, because the "E" is different in both types.
Method m2 returns a reference of type I<capture of ? extends I<E>>, where E extends I<capture of ? extends I<E>>, that is, it returns a concrete instantiation of the interface, namely I<SomeType> with a type that extends I<SomeType> with a type that extends ... continued recursively.
On the other hand, method m1 is supposed to return a reference of type I<? extends I<E>>, where E extends I<? extends I<E>>, that is, it returns a wildcard instantiation of the interface, namely I<? extends I<SomeType>> with a type that extends I<? extends I<SomeType>> with a type that extends ... continued recursively.
And here is the point: The first construct leads to a concrete instantiation like a List<List<List<String>>>. The second construct lead to a recursive wildcard instantiation like List<? extends List<? extends List<?>>>. As soon as the wildcard appears on a nested level, the types are no longer compatible.
It's like assigning a List<List<String>> to a List<List<?>>. It's not permitted because the first is a list of string-lists and the second is a list of mixed-lists. You cannot assign one to the other.
In your example, changing
    public interface I2<Tx, T extends I2<Tx, ?>> to
    public interface I2<Tx, T extends I2<?, ?>>might do the trick.
(As usual, ignore the annoying additional angle brackets.)

Incompatible Types in Assignment for CGPoint

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