Why Java Does Not Support Return Type In Method Overloading

Feb 7, 2015

why Java does not support return type in method overloading. I coded following and it compiles and runs without any errors.

class Ideone
{
public static void main (String[] args) {
sum(3,5);

[code]....

If Java did not support overloading based on return type, this program should not work, right?

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Method Must Return Int Type - If Given Integer Is Strong Return A / If Not Return B

Sep 7, 2014

I want to use a method, which takes for example an int and also returns an integer. For example, if the the given integer is strong return a, if it is notstrong return b. How would you write that in a Code?

I want to use that in a more general way. I want to give a method mlong the value X of the type date and let it return an int. Type date consists of 3 int, one of them is the int month.

mlong should return an int depending on the X.moth. at the moment my code looks like this:

// File1:
public class date {
public int day;
public int month;
public int year;
}

// File 2:
public class monthlength {
public int mlong(date X) {
int t;
t = X.month;
if (t == 1 || t == 3 || t == 5 || t == 7 || t == 8 || t == 10 || t == 12)
{ return 31; }
if(t == 4 || t == 6 || t == 9 || t == 11)
{return 30;}
}
}

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How To Return Values In Object Return Type Function (method)

Apr 2, 2014

How do i take input values for TwoDPoint (which are objects) and return it back in numerical values also print them.

When i create an object in main method and pass values to my function of return type TwoDPoint,it gives error:- found int,int need TwoDPoiint,TwoDPoint.

// Here is what i tried to do:

Created class TwoDPoint that contains two fields x, y which are of type int. Defined another class TestTwoDPoint, where a main method is defined.In the main method created two TwoDPoint objects.

Then I modified the class TestTwoDPoint and add another function to it. This function takes two TwoDPoints as input and returns the TwoDPoint that is farthest from the point (0,0).

Then I added another function to TestTwoDPoint. This function takes two TwoDPoints as input and returns a new TwoDPoint whose x value is the sum of x values of the input TwoDPoint's and whose y value is the sum of the y values of the input TwoDPoint's.

class TwoDPoint {
int x = 2;
int y = 4;
}
class TestTwoDPoint {
public static void main(String args[]) {
TwoDPoint obj1 = new TwoDPoint();
System.out.println(obj1.x);
System.out.println(obj1.y);

[Code] ....

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Java Method Overloading

Feb 24, 2014

The class Overloading below asks for two names and prints three different greetings. Your task is to write the class methods missing from the class declaration. Methods print the greetings as shown in the example print. The names and parameter types of the needed methods can be checked from the main method because all methods are called there. This exercise also does not require you to copy the source code below to the return field. The method declarations will suffice.

Example output

Type in the first name: John

Type in the second name: Doe

Java Code:

import java.util.Scanner;
public class Overloading {
public static void main(String[] args) {
String firstName, secondName;
Scanner reader = new Scanner(System.in);

[code]....

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Set Method Return Type Determined Inside Method

Dec 25, 2014

I need to write a method that will consume string representation of Object type and will return one object of this type. How to set return type for the method in this case?

Here is exmaple :

public <?> identifyType(String typeString){
if (typesString.matches("String")){
return new String("");
}else if (typeString.matches("Integer")){
return new Integer(0);
}
//....etc..}

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Java Method Overloading Ask For Two Names And Prints Three Different Greetings

Feb 24, 2014

The class Overloading below asks for two names and prints three different greetings. Your task is to write the class methods missing from the class declaration. Methods print the greetings as shown in the example print.

Hint:The names and parameter types of the needed methods can be checked from the main method because all methods are called there. This exercise also does not require you to copy the source code below to the return field.

The method declarations will suffice.

Example output
Type in the first name: John
Type in the second name: Doe

**********
Hi!
**********
Hi, John
**********
Hi, John and Doe
**********

import java.util.Scanner;
public class Overloading {
public static void main(String[] args) {
String firstName, secondName;

[Code] ....

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OOP A Method Being A Return Type In A Method?

May 21, 2015

I stumbled upon a method that im not sure how to handle (yet).Below the code:

public DateTime() {
this.day = day(milliseconds);
this.month = month(milliseconds);
this.year = year(milliseconds);
this.hour = hour(milliseconds);
this.minute = minute(milliseconds);

[code]...

The two last methods stumped me. The return type to each is "DateTime", according to JUnit complaints.I know that I can use the "this" keyword to reference to the object. But how do I get these two methods to return the correct result?

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Sorting ArrayList Of Type Int - Overloading Efficiency

Feb 11, 2014

I have a case in which I want to sort two types of ArrayLists (using quicksort) and the method originally coded only accepts a String ArrayList. The problem is that now I want to sort an ArrayList of type int but couldn't . . . so I decided to overload the method. Since it looks very ugly to copy and paste the same chunk of code only to change the method signature I wondered if there is a better way to make this method more dynamic and be able to take in different types of ArrayLists.

My code:

private ArrayList<String> sort(ArrayList<String> ar, int lo, int hi){
if (lo < hi){
int splitPoint = partition(ar, lo, hi);
sort(ar, lo, splitPoint);
sort(ar, splitPoint +1, hi);

[Code] .....

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Java Does Not Support Multiple Inheritance Using Classes

Aug 16, 2014

I studied that java does not support multiple inheritance using classes. It is fine practically, but I have still a question in mind:Lets see the below code.

class Test{
------
------
}

class MyTest extends Test{
---------
---------
}

Here, as we know that that Object is Super class for every class in java. and I have already extends a Test class in MyTest.My question is: How is it possible to extend features of two class at the same time?

Theoretically,

MyTest extends Object &
MyTest extends Test.

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JAVA Calculator - Equals Method To Return Appropriate Value Using Standard Arithmetic

Apr 18, 2014

I am having trouble using the equals method to return the appropriate value using standard arithmetic.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

[Code] ....

I know that "inText.setText(Integer.toString(secondOperand));" in the code is wrong, I just don't know the right code...

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Why Operator Overloading Is Not Supported In Java

Oct 18, 2014

why operator overloading is not supported in Java.

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Java Method - Return True If String Can Be Found As Element Of Array And False Otherwise

Mar 17, 2014

I am new to Java and would like to ask how to do this question specifically:

Code a Java method that accepts a String array and a String. The method should return true if the string can be found as an element of the array and false otherwise. Test your method by calling it from the main method which supplies its two parameters (no user input required). Use an array initialiser list to initialise the array you pass. Test thoroughly.

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If Statement Requires A Return Of Type Boolean

Dec 6, 2014

Im trying to do this

if( 2/2 ) {
system.out.println( "number is not event" );
} else {
system.out.println( "number is event" );
}

However if statement requires a return of type boolean. So im forced to this instead

if( (2/2) != 0 ) {
system.out.println( "number is not event" );
} else {
system.out.println( "number is event" );
}

Is there a way to achieve the former method, without typecasting, if you had to typecast how do you do it?

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Calculate Distance Between Two Points - All Numbers And Return Values Should Be Of Type Double

Jul 8, 2014

Write method distance to calculate the distance between two points (x1, y1) and (x2, y2). All numbers and return values should be of type double. Incorporate this method into an application that enables the user to enter the coordinates of the points.

Hints:

- The distance between two points can be calculated by taking the square root of

( x2 - x1 )2 + ( y2 - y1 )2

- Use Math class methods to compute the distance.

- Your output should appear as follows:

Type the end-of-file indicator to terminate

On UNIX/Linux/Mac OS X type <ctrl> d then press Enter

On Windows type <ctrl> z then press Enter

Or Enter X1: 1

Enter Y1: 1

Enter X2: 4

Enter Y2: 5

Distance is 5.000000

Type the end-of-file indicator to terminate

On UNIX/Linux/Mac OS X type <ctrl> d then press Enter

On Windows type <ctrl> z then press Enter

Or Enter X1: ^Z

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How To Return Array From A Method / Back Into Main Method That Prints Out Stuff

May 27, 2014

I'd like to know how to return a new array, I wrote in a method below the main method. I want to print the array but system.out.print doesn't work for arrays apparently. What structure i should use?

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How To Link Compress Method To Return Statement Method GetPText

Oct 30, 2014

Alright, I don't understand how to link my compress method to my return statement method "getPText". Also in my compression I only want it to compress for 3 or more consecutive letters.

import java.util.Scanner;
class RunLengthCode {
String pText;
String cText; 
void setPText(String PText) {
pText = "";
}

[Code]...

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Method Return 0 Value

May 1, 2015

I'm trying to calculate a certain value, but it is returning 0 and I'm not sure why. This is a measurement to define the angle from the equator and the center of the sun

public static double declination(int dayOfYear) {
double declination = asin((sin(23.45)*sin((360/365)*(dayOfYear - 81))));
System.out.println("dec " + declination);
return declination;
}

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Return Outside Method

Jul 27, 2014

Here is the code:

import java.util.Scanner;
public class beersong
{
public static void main (String[] args)
{
int bottle;
int bottlenumber;
int bottlezero;

[Code] ....

And here is the problem:

return "nine";
^
error: return outside of methood

what do i do?

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Average Return Method

Dec 7, 2014

For my project, I am trying to return the method average so the program can calculate the average after grades are enter. I'm not sure what I am doing wrong and how I should improve it. My code is below. This is my error message: "Project.java:71: error: '.class' expected".
 
import java.util.Scanner;
public class Project
{
public static void main(String[] args)

[code]....

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Why Cannot Get Append Method To Return Itself

Mar 11, 2015

This is my class code below and the Junit test that is being run.

My problem is that when I try to make an append to my list I have to return the actual list but I cant figure out where I am going wrong.

Java Code:

package structures;
import java.util.Iterator;
import java.util.NoSuchElementException;
public class ListImplementation<T> implements ListInterface<T> {
private Node<T> listHead, listTail;
private int size;

[Code] .....

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Method Return Statement

Apr 2, 2014

Im having trouble with my method return. I am new to using methods and cant seem to grasp the idea on the return part. I have to write a method that tells if a number is prime or not. This is what I have so far and it wont compile because it is saying "missing return statement } "..

import javax.swing.JOptionPane;
public class IsPrimeMethod
{
public static void main(String []args)
{
String primeNum;
int number;
int i = 2;
 
[code]....

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Return Method Involving Arrays

Mar 2, 2015

public class School {
public final int MIN_GRADE = 0;
public final int MAX_GRADE = 100;
private int [] grades;
public School( int students ) {
grades = new int[students];

[Code] ....

The output is :

The numbers in the array are: 1 2 3 4 6 7 8 9 10 13 14 15
The highest grade is: 11

For some reason it is not giving me the highest number in my array. Did I write the method wrong ? Is my array even passing through HighestGrade ?

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Error When Trying To Return Array Via Method

Jan 14, 2014

I am getting these errors with this code, I can not figure why this error is occuring.

what is the issue with this code?

Java Code: package ABC;
import java.util.ArrayList;
import java.util.Scanner;
public class GetInputFromUser {
private ArrayList<String> name = new ArrayList<String>();

[code]....

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Return Statement In Method Overriding

Jan 1, 2015

class Base
{
public Base rtc() {
System.out.println("am in parent");
return new Base();
}
}
class Ret extends Base

[Code] ....

Output :

I am in child class but b1.rtc requires b2 to hold the return value y not Ret's object.

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Covariant Return In Overridden Method

Mar 5, 2015

For starters here is my code:

Java Code: class A {
int x=5;
}
class B extends A {
int x=6;
}
public class CovariantTest {
public A getObject() {

[Code] ....

And this is the output I get:

sub
5

I am unable to figure out how this is outputting 5 instead of 6. The getObject method of SubCovariantTest is obviously the one being called, and it returns a new B(). So why am I getting class A's x value? I thought since I was getting a B object returned that I would get B's x value.

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String Method To Return A Double

Jul 11, 2014

I'm having an issue with figuring out how to structure and call a method using a string prompt. My prof has given us specific methods to create, and the one I'm having issues with is blic static double getOperand(String prompt). What I have currently is this:

public static double getOperand(String operand1, String operand2){
Scanner input = new Scanner(System.in);
System.out.println("What is the first operand?");
operand1 = input.toString();

System.out.println("What is the second operand?");
operand2 = input.toString();
return operand1, operand2;
}

which is obviously not working. When I asked my prof he sent me this, "The String paramater in the getOperand() method is intended to have the prompt value that is passed to it. Within the method, the prompt is then displayed, what the prompt is asking for is input, and then returned to the method call.For example, if the method is public double getOperand(String prompt) within the method you would display the prompt, as in System. out. println(prompt), use the Scanner class to create an object, perhaps called input, and then use the input object to get the value asked for by the prompt. Once you have that value, which in this example would be a double, then return the value to the method that called it.

The call could be something like this: double value = getOperand("What is the first operand?");". But that only works a little. Clearly I'm missing something and no matter what I google, or how many times I read the chapter, I am just not getting this. Everything else up to this point has been easy. and I can create regular methods just fine, the menu method works, but I can't figure out this string method and all the rest build off this method.

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