Write the header for a method named send that has one parameter of type String, and does not return a value.Write the header for a method named average that has two parameters, both of type int, and returns an int value.
View RepliesI have a class, which communicates with database via SQL queries. But one queries don't produce any ResultSet, while other queries do. Now I'm facing situation, where I have two methods, one which executes queries with return values and other which executes queries without return values:
public ResultSet executeQueryWithReturn(String query){
try{
return executeWithReturn(query);
}catch(Exception e){
e.printStackTrace();
[Code] .....
But I see few problems here: 1) Method can return null, (I read in book Clean Code, that people should avoid return null) Another issue - boolean value breaks the rule that method should do only one thing.
Maybe there is a better option? or maybe I should forget these two issues here for readability?
Some methods such as ServletRequest's getParameterValues return a String array whereas others (e.g. HttpServletRequest's getHeaders) return an Enumeration. Do these return types need to be learned parrot-fashion, or is there some sort of logic to it?
View Replies View RelatedI 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;}
}
}
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] ....
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 even return 1, if it is not even return 0. 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;}
}
}
I am making a calculator in Java. However, when I press the "=" button on my calculator, it always returns 0.0, no matter what. I don't understand why? The code is below:
import javax.swing.*;//import the packages needed for gui
import java.awt.*;
import java.awt.event.*;
import java.util.Arrays;
import java.util.List;
import static java.lang.Math.*;
public class CalculatorCopy {
[Code] ....
I am working on a program to have a user input two positive integers and then finding the greatest common denominator between the two. My problem is, I don't know how to display the number (num2) that is returned after the method. Putting a simple System.out.println gives me the error "unreachable code".
import java.util.Scanner;
public class ****
{
public static void main(String[] args)
[code]....
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;
}
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?
So I'm trying to check if the new coordinates vs original coordinates are diagonal and 1 line further, and if there is a piece there(getNum()) if it's 2 lines further, so I'm trying to return a boolean value then.
so if it's the first if, it returns true, if it's the 2nd it returns true, then I say else for all other scenario's, and return false there, but my compiler says my method is missing a return statement.
public boolean check(int[] d) {
int x,y;
x = loc[0][0];
y = loc[0][1];
int sx = d[0];
int sy = d[1];
[Code] .....
Edit: used a local boolean and returned that after my if's.,
Here, I want to avoid using the line **return"";** and instead return all of the values I output with **System.out.println();**
I have tried using a **StringBuilder** method, but this outputs nothing when I run my test program. I am guessing that StringBuilder must work differently in a while loop, but I can't find how!
[URL] ....
public String toString(){
int topLine = size;
int topCurrentLine = size;
int bottomLine = 1;
int bottomCurrentLine = size;
[Code] ....
If this method returns the lowest score, how do I return the 2 lowest scores.
For example If I input 1, 2, 3, 4, 5 this code will return 1.
How do i return the two lowest scores, for example if I input 1, 2, 3, 4, 5, I want to return 1, 2
public double getLowestScore() {
smallest = testScores[0];
double sum = 0.0;
double total = 0.0;
double Average = 0.0;
[Code] ....
I am trying to return the lowest value from the array. having trouble trying to capture the return value by placing it into the variable ..
int myLowest = getLowest(yourNumbers); and then printing out myLowest
import java.util.*;
public class numArrays
{
public static void main(String[] args){
int numbers;
int[]yourNumbers;
[code]....
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
int hours = getHours(kb);
char major = getMajor(kb);
[code]....
I'm trying to return a char c,o, or x if that is their "major code" that the scanner grabbed.
What is the difference between two statements:
Class1 class1 = new Class();
class1 = Class2.method1();
and
Class1 class1 = Class2.method1();
I have one more query on the same lines ... I always need to call the method1 of Class2 whenever i create a object of class1. So I wanted to go with the constructor in Class1. But the method1 in Class2 has a return statement. so is there any better way to do this other than constructors.
Sample code:
public int class Class2{
public static method1(){
return 2;
}
}
public class Class1{
public Class1(){
Class2.method1();
}
}
I am working on this new project where we are using the great distance formula but every time I run my ending result is NaN. I was researching, and people say its because you divide by 0. I think I have my formula correct.
Java Code:
public class testingFormula {
public static void main(String[] args) {
double lat = 34.01858902;
double lon = -118.2817688;
double lat2 =33.94530869;
double lon2 = -118.3994904;
[Code] ....
why i cant get the return value to my conversion class.
import java.util.*;
/*
*
*
public class MetricTest {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
// declare a sentinal to exit the loop
String check = "Quit";
[code]....
what would the return be for adding two array's together,
public static int sum (int[][] a, int[][] b) {
int[] [] c = new int[a[0].length][b[0].length];
for (int i=0; i< a.length; i++){
for (int j=0; j<a[i].length; j++){
c[i][j] = a[i][j] + b[i][j];
}
}
return c[i][j];
}
My return is wrong...... I know, Any hints?
I keep getting a zero dollar return when I run my main. I am multiplying grossPay by hours but something is not catching.
public class employee {
private String name; //employees name
private int id; //employees id number
[Code].....
I've to return some value as a string and some as a int, how is this possible? Here's my code:
public class Card {
public void start(){
String [] suit = {"Spade","Club","Diamond","Heart"};
int [] number = {1,2,3,4,5,6,7,8,9,10,11,12,13};}
public String getColour(){
String [] suit = {"Spade","Club","Diamond","Heart"};
[Code] .....
So at the top, i've set it to return value as string because of the King Jack Queen and Ace, but i also have to return as numbers(int). And also i'm using a loop to read all the numbers, is there any other way?
Here's the small project... but how can I return the value (amount) in 10 years ? The way I did, the program just doesnt return anything...
import java.util.Scanner;
public class FutureValue
{
public static void main (String []args) {
double amount = 0;
double apr = 0;
System.out.println("How much money would you like to invest?");
[Code] ....
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]....
Can I pass in a return value in a parameter? I'm trying to do something like this:
Object o = new Object(anotherObject.method());
Where method returns an int. But when I try doing this it calls that method, rather than passing in the return value..
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] .....
I want to return values from arrays to the main and the problem is i cant use my variables from my constructor, I use new variables in my functions and i know this is no good, when I used the variables from the constructor in my function. I have a compilations errors,also i want to create un object in main and with this object i want to call the functions.
Java Code:
package javaapplication4;
import java.util.Scanner;
public class JavaApplication4 {
public static int[] MyInt;
public static double[] MyDouble;
public static String[] MyString;
public static char[] MyChar;
[Code] .....
The code is working when i run it and i have the right result in my screen but i know this is all wrong with the variables.