So I make a HashMap which is pretty simple. My book showed me how I would print all the values in a format showing their key a ": " and the the actual value. What I don't understand is why the type element for the for each loop is the interface, Map.Entry.
I had to make a table showing different values for converting kg to lbs and I'm confused because when it compiles, some of the decimals show correctly and some of them show with several 0's added on with another number on the end. I've tried to do math.random, but I'm not sure how to tie it in with my program.
//1 kg = 2.2 lbs public class kg_to_lbs { public static void main(String[] args) { //not sure if values are needed.. int kg = 1; double lbs = 2.20; //Table title
I read on how to use the continue statement, but I'm failing in how to use it properly, mostly because it's not working. I'm supposed to print out what numbers are showing up and how many times for each. Plus, I have to print out 'times' instead of 'time' if there's more than one of a certain number. Right now, it's printing out all the numbers including the ones that don't get inputted.
import java.util.Scanner; public class occurrence { public static void main(String[] args) {
//scanner/values Scanner input = new Scanner(System.in); int number = 101;
I need this program to print out the gpa down to 2 decimal places and I can't figure out how to do it. It keeps saying it can't find decimal format and I'm not sure how to define it.
Java Code:
import java.util.Scanner; public class GPACalculator { public static void main(String[] args) { double creditHours = 0; double gradePoints = 0;
so I need my program to print in decimal format and I keep getting an error saying that it cant find symbol "decimalFormat". here's what I have so far.
import java.util.Scanner; public class GPACalculator { public static void main(String[] args) { int creditHours = 0; int gradePoints = 0;
public static void main() { int i; // counter createDeck(); // this is a function call // Show the cards in the deck System.out.println("The deck is as follows:"); for (i=0 ; i < CARDS_IN_DECK ; i++)
[code]....
It is now printing out the value of myDeck[5] but I need to print out first 5 values.
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class Hmwk1 { public static void main(String[] args) { String fileName = "lotto.txt"; final int arraySize = 45; int[] count = new int[arraySize];
[Code] .....
My problem is where do I start or add the following code to be added?
I only want to use 1 array and may be or should I try a catch block? The number or numbers that were picked least frequently.
The average number of times that all of the numbers were picked. For example, the average might have been 210 times.
The number or numbers that were picked the average number of times.
The number or numbers that were picked most frequently.
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.Find the sum of all the multiples of 3 or 5 below 1000.
public class ClassEcerciseOne { public static void main(String[] args) { // TODO Auto-generated method stub int x=0; int y=0; for (x=0;x < MAX_VALUE;x++){ if (x/3==0){ System.out.println(x); int z= x++;
When I run this code, it is supposed to get one value from turnTimer(); and return it, just as a test. This works when I enter a valid pit. For example. If I were to input "A" when it's player one's turn, it will return 1, like it should. However, if I were to type "H" when it's player one's turn, it returns "Not a valid pit!"(like it should) but then it also returns 12. It shouldn't know that H is 12 because it's in a separate method. I'm confused as to why it's printing both values.
import java.util.*; public class Mancala { static Scanner input = new Scanner(System.in); public static int pit; public static void main(String[]args) { Mancala mancala = new Mancala(); int[] board = {0,3,3,3,3,3,3,0,3,3,3,3,3,3};
Use the sort method of the arrays class to sort the values in the array, and print the median value(the 50th value) on the console followed by a blank line. Then, test this enhancement. Print the 9th value of the array on the console and every 9th value after that. Then, test this enhancement.
import java.util.Arrays; public class ArrayTestApp { public static void main(String[] args) { double [] arrayTest = new double[99]; //adding random number to each element in the array for(int i=0; i<arrayTest.length; i++) arrayTest[i] = 100.0*Math.random();
[Code] ....
OUTPUT
run:
The average is: 49.842845462514944 The median is: 49.68753724038633 The 9th value is: 2.599530043466969 The 9th value is: 11.486193141397095 The 9th value is: 20.14206270200648
So I'm learning java from a website and I was tasked with creating a simple program which allows the user to enter a series of integers, then finally when they decide to input a non-integer the program will print the maximum and minimum values of the integers they entered. So for example if they entered 5, 4, 3 and 2 then enter a non-integer the program would output 5 (maximum value), then 2 on a new line (minimum value).
Here is my code:
import java.util.Scanner; public class MaxMinPrinter { public static void main(String[] args) { Scanner in = new Scanner(System.in); int max = Integer.MIN_VALUE; int min = Integer.MAX_VALUE;
[Code] ....
And this is what the output looks like:
Actual output ------------------------------------------- Enter an integer: 5 - 10 - - Enter an integer: -4 - 8 - -6 - - Enter an integer: 11 - -1 - - Enter an integer: q - -1 - -6
When it's supposed to look like this:
Expected output ------------------------------------------- Enter an integer: 5 Enter an integer: 10 Enter an integer: -4 Enter an integer: 8 Enter an integer: -6 Enter an integer: 11 Enter an integer: -1 Enter an integer: q 11 -6
I had to write a foor loop to count the values of a stack of quarters from 1.00 to 3.00 and I had to print the values, that I understood and got it working so I taught the next assignment was going to be easier but I am having a hard time with it. For this one I have to write a for loop to print all the positive integer factors of 144 and I am supposed to print of factor per line but I tried doing that but it doesn't work it just prints out 144.
This is my code. The quarter assignment is also in there because it is part of a lab so just ignore that part since it is working correctly.
public class ForLoopPractice { public static void main(String [] args) { // Write a for loop to count out the values of a stack of quarters from $1.00 to $3.00 // Print the value of each iteration. Print this all on one line, rounded to the nearest cent. // To print rounded, use printf, with a placeholder of %.2f // (%f is the floating-point placeholder; the .2 indicates the number of decimal places) /* YOUR CODE HERE */ for (double q = 1.00; q <= 3.00; q += .25)
/* Purpose: To write the methods and the rest program. The program should fill a 4 X 4 2 dimensional array with random numbers between 100 and 200. The program should then determine and print the largest and smallest values within the array using two Methods Largest and Smallest. The program should then determine and print the number of values within the array that are even using a function called Even. The program should also enter a loop that will only terminate when the user inputs a -1 as a choice. The loop should continue to ask the user to guess a number that was randomly generated. The program should call the Findit function to determine if the number was in the array. The program should print out the values in the array when the user selects a -1 and then terminate. */
import java.util.Scanner; import java.util.Random; public class LNFI_2DArray { public static void main(String[] args) { int guess; int[] array = new int[4];
[Code] ....
I just had this code working, then all of a sudden i was hit with a 'keyboard leak' error code.
Basically the class is supposed to have a static variable that keeps track of the number of companies (numberOfCompanies) that have been created and a static method that returns the value of this variable. I need to have a constructor and a method to addEmployee, a method to printCompany, and a toString method. The addEmployee method will check that there is only 1 salesperson, 2 designers, and 4 manufacturing persons at a time and will check that there are no more than 7 employees of the company.
The addEmployee method will return a String indicating what the error is (i.e. "There is already a sales person in this company") or a null if the employee was added. If attempting to name a third company, an error message will be shown. what i have so far but my print company mmethod returns null company class :in which i am obliged to use inputdialog because it says that it cannot return void when i use the showmeassage diaolog.
company class:
import java.util.ArrayList; import javax.swing.JOptionPane; public class Company { private ArrayList<Employees> list ; private static int numberOfCompanies;
[Code] ....
error message when print button is clicked:
Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: JOptionPane: parentComponent does not have a valid parent at javax.swing.JOptionPane.createInternalFrame(Unknown Source) at javax.swing.JOptionPane.showInternalOptionDialog(Unknown Source) at javax.swing.JOptionPane.showInternalMessageDialog(Unknown Source)
I need a way to store the pixels values currently on the screen and compare them to the values on the first frame. Right now I'm using glreadpixels as follows:
currentBuffer= BufferTools.reserveByteData(mapSize); glReadPixels(mapStartX, mapStartY, mapWidth, mapHeight, GL_BLUE, GL_UNSIGNED_BYTE, currentBuffer); for (int i = 0; i < mapSize; i++) { if (currentBuffer.get(i) != baseBuffer.get(i)) { //Do nothing continue; } //Do something }
This works perfectly fine but turns out to be a real bottleneck, dropping the fps to a third of what it was. Is there any quicker way? All I'm after is speed, I don't even need to show it on the screen if the comparison is made "behind the scene".
I have a question in mind that this is my registration form. I am sending these values from HTML form to server and database. I have question that in my case if I click next to Add Another Mobile no in HTML.then a block is genereated and each time a new name is generated.
My Question is if I click 6 times then 6 name attribute are generated. How can I send and differentiate them on my server side.
Because at their I will use something request.getAttribute("Attr_Name");
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class C1 extends JFrame { public C1() { JMenuBar b = new JMenuBar(); b.setBackground(Color.green); setJMenuBar(b); setVisible(true); } public static void main(String[] args) { C1 c = new C1(); } }
In my if statement on line 46 & 47 im trying to add the buttons to the screen if the player has lost and the "game over" screen have popped up. But the buttons aren't showing... what am i doing wrong?
I'm trying to show mysql data in JSF using this example [URL] .... . I figured out what <h:dataTable value="#{userBean.getUserList()}" var="u" border="1"> must be <h:dataTable value="#{userBean.userList}" var="u" border="1"> but getting error:
09:08:38,654 ERROR [stderr] (http--127.0.0.1-8080-1) at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
09:08:38,654 ERROR [stderr] (http--127.0.0.1-8080-1) at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
MyGraphics worked before I added a background but, even now when I take the background away it isn't showing up.
package com.snow.game; import javax.swing.*; import java.awt.*; class MyGraphics extends JComponent { //creating a class for graphics public void draw(Graphics g){ //calling Graphics making a new graphics (g) now you can use it to make objects g.drawRect(10, 10, 50, 50); //Draws a rectangle
I have one code [taking from on line SCJP exam preparation site]. I have 2 question in my mind:
1) addValue() is non static method then why it is running without object inside constructor. By this rule it should show compilation error. 2) With ref variable of parent always non overridden methods of parent run then it must value of 10 [If i forgot 1st point ]
But it is giving 40. Code is as below:
class Base{ int value = 0; Base(){ addValue(); } void addValue(){ value += 10;
