Code in the book is written exactly like this:
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...
My goal is to ask them for their name and if they got it right then it says yes while if they wrote it wrong, it would say no.
Java Code: public static void main(String[] args) {
Scanner name = new Scanner(System.in);
System.out.println("What is your name?");
String sname = name.nextLine();
name.close();
System.out.println("Are you sure it's " + sname + "?");
Scanner tfname = new Scanner(System.in);
String stfname = tfname.next();
[code]....
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;
[Code]...
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){
[Code].....
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 +" ");
[Code] ....
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){
[code]...
How do I make it so that if both numbers are entered between 10 and 20 it will print false?
The assignment: Ask the user to enter 2 ints. Output "true" if one of them is in the range 10 - 20 inclusive, but not both. Otherwise output "false"
12 99 → true
21 20 → true
8 99 → false
15 17 → false
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: " );
[Code] ....
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.
Sometimes a nullpointerexception is thrown, in some cases null is easily printed as a value of a variable without an exception being thrown.
View Replies View Relatedi want to create a program in java which counts the number of prints taken from a printer..
View Replies View RelatedIf I code:
int num0=0,num1=1,num999=999;
System.out print(num0+","+num1);
System.out println(","+num999);
I believe I'll get: 0,1,999 but I want 0000,0001,0999 i.e. a width of 4 for small integers.
the number of lines that can be printed on a paper size, the point size of each character in a line, whether lines are double-spaced or single-spaced,the top and the bottom margins of the paper. assume that all characters are of the same point size, and all lines are either single-spaced or double-spaced. note that 1 inch = 72 points. make over, assume that the line are pointed along the width of the paper. for example, if the length of the paper is 11 inches and the width is 8.5 inches,then the maximum length of a line is 8.5 inches.write a program that calculates the number of characters in a line and the number of lines that can be printed on a paper based on following input from the user.
a.the length and width, in inches, of the paper.
b.the top, bottom, left, and right margins.
c.the point size of a line.
d. if the lines are double-spaced, then double the point size of each character
I have the following code....................
double[][] cmMatrix = eval.confusionMatrix();
for(int row_i=0;row_i<cmMatrix.length; row_i++){
for(int col_i=0;col_i<cmMatrix.length;col_i++){
myConsole.getOut().println(cmMatrix[row_i][col_i]);
myConsole.getOut().println("|");
}
myConsole.getOut().println();
}
What do I need so that each row is printed out on a single line ?
I am trying to have a user select from a printed out array list, instead of having the user type in the "bill type" each time there is a bill to avoid user error as much as possible. For example I would like to have it print out like this:
"Select bill type from list:
1. Rent
2. Car
3. etc..."
and I would like the user to choose a number and not type in the "bill type". I don't want to use "Switch case" because it would need to be an expanding and I don't think "switch case" can do that.
Here is the code:
package homebudget;
class Spending
{
//Do i need a totalAmount variable?
String type;
double amount;
int year, month, day;
public Spending()
[Code] ....
case 2:
//Give option to enter a new expense or pick from list.
//How to do this? If Statement that doesn't list duplicates, or a while search?
resp = JOptionPane.showInputDialog("Enter the type of expense:");
type = resp;
resp = JOptionPane.showInputDialog("Enter the amount of the expense:");
amount = Double.parseDouble(resp);
[Code] .....
I am aware that the default value of char is 0. But in this program I am getting some unexpected output
public class TestClass12{
static int[] ia = new int[1];
static char ch;
public static void main(String args[]) throws Exception{
System.out.println("ch:"+ch+" ia[ch]:"+ia[ch]);
}
}
Output:
ch: ia[ch]:0
If you see the above output ch is printed as a blank space instead of 0, while the array default value is correctly printed by taking the char default value as index. Why is ch printed as blank space?
Write a program to request a student number and their marks in 4 subjects. The program must print the student number, total marks and average mark. All outputs should be printed with suitable labels
This is the error am getting
Scanner get = new Scanner (System.in) - got a red line
int student number, total marks, average mark - got a yellow bulb with a red exclamation mark on it.
I just dont understand where the errors is where what the system dont have ... I am using netbeans ....
I learning java an created the following servlet. The only problem is it printed to the browser as text instead of html..
It literally printed like this.
<html>
<HEAD><TITLE>Hellow World</TITLE></HEAD>
<body>
This STUFF IS WORKING!!!!!!!!!!!!!!!!!!
</body></html>
Why???
This is the servlet I created.
package sample;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld extends HttpServlet {
[Code] ....
If I for example choose 8 as "multiplikationstabell" and 4 as "faktor" the whole code works except that "svar" gets printed as 8 in every turn. Why? "Faktor" gets added with 1 every time but "svar" stays at 8.......
import java.util.Scanner;
public class Multiplikationstabell {
public static void main(String args[]){
Scanner Heltal = new Scanner(System.in);
[Code] .....
I have tried as much as I can to place code to give me only two decimals in answers but cannot get it to work not sure if placement or syntax.This is code so far and it works but gives answers to 8 decimals.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
[code]...
I am new to programing and I am making a dice game where I have to roll two dice and add the total together for each dice (2, 3, 4 ect.) I have all the program finished except one thing.
How would I use the * character that shows the total percentage each number was rolled. Each * will represent 1% of the total rolls. Instead of saying there were ( 4 ) 2's rolled i have to put ( **** ) 2's rolled.
2: ***
3: ******
4: *********
Will the postfix x++ and the prefix --y change the answer for this question?
If x has the value 10 and so does y, then what is the value of (x ++) * (-- y)?
Answer: 11*9
I am creating a body mass index calculator and i was wondering how i could make its so that the program resets itself once the BMI has been found....
My code is below...
package bmiCalculatorSource;
import java.util.Scanner;
public class BMICalculator {
public static void main(String[] args) {
final double KilogramsPerPound = 0.453;
final double MetersPerInch = 0.026;
[Code] ....
I would like to put the answer of JCheckBox inside of a JTextArea. How to call the answer of JCheckBox if its check the response should be Yes if its unchecked the response should be No, and the yes/no answer should be appear inside JTextArea. But my problem is inside the JTextArea the answer from a JTextField and JComboBox is also there, and they should be appear in a parallel. I attached the physical appearance of the GUI.
Attached image(s)
I want to design an open-answer quiz game using Java. Basically, the plan is to design a quiz where the name of a medicine is displayed as "the question" and the player will need to input the unique code (as "the answer") of the medicine in an open box (all the codes are two characters). The list has about 204 named medicine (with potentially more to be included at a later stage). The questions will not appear in the same order for each session restarted; they will appear randomly.
The player will have 60 seconds, and for each correct answer, will score 1 point and add 2 seconds to the timer. The player will also have 6 "lives", and for each incorrect answer, the player will lose a life, with no effect on the time.
The idea of the game is that the player memorise as many of these medicine codes as possible.
I am writing a simple learning program that does basic math. Everything is working as needed except for when it comes to division. I need to know if there is a way to format the users input to two decimal places and that when the program checks the users answer against the division, it gives it a yay or nay. Right now, it wants the answer out to 12 decimal places.
So for 5/3
I would like it to accept the answer 1.67
not 1.666666666667
Is there a way to do this?
I am having trouble figuring out where to put %.2f in my code. I need it to get my answers for surfaceArea and Volume to be rounded to two decimal points. I have everything completed but wherever i put it, it seems to not work.
System.out.println("This program will compute the volume and surface area of a rectangular prism.");
String output;
double length;
double width;
double height;
double volume = 0;
double surfaceArea = 0;
System.out.printf("%.2f", surfaceArea);
[code]....