I have the code and it works very well, but my professor wants us to use Junit testing to test our code. I've never used JUnit before, how it works. Is it possible to have a boolean value (true or false) randomly set?
Here is the code I need to test:
package musicalinstruments;
class MusicalInstrument {
public String name;
public boolean isPlaying;
public boolean isTuned;
public MusicalInstrument(){
isPlaying = false;
isTuned = false;
Create an application that generates a quiz. Prompt for the user's first and last name, college major, and confidence in test taking (high, medium, or low). The quiz should contain at least five true/false questions about horticulture. When the user selects the correct answer, a message of positive reinforcement should be displayed. If the user selects the incorrect answer, the correct answer should be displayed with a message of constructive criticism. At the end of the quiz, display the number of correct and incorrect answers as well as the percentage of correct responses for each user.
import java.util.Scanner; class HorticultureQuiz { public static void main(String[] args){
I'm supposed to take this truth table and alter it so it displays 1's and 0's instead of true false. I'm assumed to do this I would just need to change the variable type and replace true and false with 1 and 0 but every way I try this does not work.
//a truth table for the logical operators.
class LogicalOpTable { public static void main(String args[]) { boolean p, q; System.out.println("P Q AND OR XOR NOT"); p = true; q = true; System.out.print(p + " " + q +" ");
I'm trying to create a program that has two labels... one in the top left and one in the top right... so far when i run it only the one in the top right (label2) shows... also In the program there will be multiple button and when I click a button it will show a different panel and then i can go back to the first panel to select other panels... so far i haven't figured out how to make panels visibility go false/true with actionlistener. last thing... when i have more then one panel added to the frame none of them show up.
Java Code:
//Matthew import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Test{ public static void main(String[] args){
import java.util.Scanner; public class AdditionQuiz { public static void main (String[] args){
//Generate random two integers using utility System.currentTimeMillis int n1 = (int)(System.currentTimeMillis() % 10); int n2 = (int)(System.currentTimeMillis() / 7 % 10);
[Code] ....
however the true/false result can not be printed due to the "answer" variable...
import java.util.Scanner; public class Practice { public static void main(String[] args) { //get user input Scanner user_input = new Scanner(System.in); System.out.print("Enter a number: " );
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.
I have a piece of code for an applet that I want to run as the main applet code, and I want it to loop until a boolean is true, but it needs to paint while the code is looping. Here is the relevant part of my code ....
The problem is it is returning -2, and also returning false when it should be true. There is no error it just is not working correctly.
import java.util.Arrays; import java.util.Scanner; /** * This Script will allow you to add e-Mails and than beable to search for them. */ public class eMailSeacher { public static void main(String[] args)
[Code] ....
1. Enter an Email 2. Find an existing email 3. Exit 1 Enter the users E-Mail: josh -1 Insertion successful.
update = new Button("Update"); update.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent evt) { MainComponent.updateComponents(); System.out.println(updated.isVisible()); updated.setVisible(true); System.out.println(updated.isVisible()); } });
When I press the button I get the following output in console: false true
If I start with setVisible(true) and use updated.setVisible(!updated.isVisible()) it works fine. Why can't I start with it hidden??
I tried to use updated.revalidate() after setting it visible. That made it work but it makes the whole UI flicker when pushing the button which isnt desired.
What is exact difference between them? Another thing is when I check (a==b) it retuns me false, but when I check a.equals(b) it returns me with true. Why So?
This method pretty much determines if there is a path from one vertex to another. When I check to see if there is a path from 5 to 2 (which there is) it return false. However, when I create a driver method, it return true (which it should). Why? It should never reach outside of the else because the condition is met, right???
Path: 5 points to 1 and 3 (1 does not have a path to anything). 3 points to only 0. 0 points to 1 and 2. Thus there is a path from 5 to 2.
Here is the code without the driver (the one that is returning false, even tho it should be true)
public boolean existsPath(int x, int y){//x = 5, y = 2 stack.push(x);//mark x as visited if(x == y){//path found stack.removeAllElements(); return true;
My isEmpty method only returns false. Is something wrong? I printed the empty and not empty for testing purposes.
//determines if there are any items in the queue public boolean isEmpty() { if (front == -1 && rear == -1) { System.out.println("empty"); return true; } else { System.out.println("not empty"); return false } }
Why isn't heig ever equal to heightShipArray[count] no matter what letter I type in
String[] heightShipArray = {"A", "a", "B", "b", "C", "c", "D", "d", "E", "e", "F", "f", "G", "g", "H", "h", "I", "i", "J", "j"}; boolean trueHeight = true; // checks if height is a letter between a-j/A-J do { Terminal.printLine("Input height with letters A to J");
I wrote a simple enum and a test class. The enum represents us coins and my test class uses the enum to calculate the change with the least number of coins. For example, I pass in 95 cents, I get back 3 quarters, 2 dimes. It all works just fine, easy to implement and I see why I should use an enum. Then I thought, what if the person is out of dimes. How could I tell the enum to skip dimes in it's switch statements? How would I make DIME(10) false?
<html> <body> <!-- Here I am going to use scripting like scriptlet,expression and other element like jsp declaration element --> <%!int i=0;%> <%System.out.println("Scriptlet");%> <%=new String("Expression")%> </body> </html>
Please enter 1 if your package is a letter and 2 if your package is a box 2 Please enter weight in pounds (Example: 1.2): 1.2 Please enter your shipping service option: Press 1 for Next Day Priority: Press 2 for Next Day Standard: Press 3 for Two Day Shipping: 1 7.00
If I comment out the else statement on the last line of code I get the following output:
Please enter 1 if your package is a letter and 2 if your package is a box 2 Please enter weight in pounds (Example: 1.2): 1.2 Please enter your shipping service option: Press 1 for Next Day Priority: Press 2 for Next Day Standard: Press 3 for Two Day Shipping: 1 13.75
What I want to happen is the code under the first comment to to execute if true, or go to the code under the next comments and execute if that statement is true and if that is not true I want the last block of code to execute underneath the last comments.
"which code is best for randomly generating integer 0 or 1". Haven't gotten my grade back yet but in reading these during the test I didn't think any of these would kick out both of those numbers, but there was no "none of the above" option on the test.This is exactly how it appeared on the test:
A) (int)Math.random() + 1 B) (int)(Math.random() + 0.2) C) (int)Math.random() D) (int)(Math.random() + 0.8) E) (int)(Math.random() + 0.5)
I've tried all of them in the cs lab 100 times each and none of them generated both numbers. 'A' kicked out 1 every time. 'B,D and E' kicked out 0.2, 0.8 and 0.5 respectively each time, and 'C' kicked out 0. Did I just not run them enough times for the result to change or am I right in thinking there's a glitch on the test?
