Since the array is always passed by refrence, it should have been modified, but it did not.
This is my code:
import java.util.Random;
class DiceRolling {
public void processDice() {
int [] frequency = new int [ 13 ];//frequency of every occurence of sum
[Code] ....
Java Code:
double Compact=30.50;
double Full=40.50;
double discount=.07;
double FullDiscount= 37.67;
double CompactDiscount= 28.37; mh_sh_highlight_all('java');
My question is how do I configure this so that when / if I need to change the discount value, it automatically adjusts the % discount off of the Full or Compact?
All I can get to work is simply hardcoding it and assigning the discount value, i'm probably just messing up the syntax.
I'm trying to code an if-else statement where I need to find the percentage discount on an item without hardcoding it.
double Item1=30.50;
double Item2=40.50;
double discount=.07;
These are the values I have. Basically I just need an explanation of how to code a statement so I receive the calculated discount of a Full or Compact.
Here is the excerpt from the code, I can copy the whole code in too if needed.
Java Code:
System.out.println("You selected Item1.");
System.out.print("Have coupon? [Y or N]");
answer = kb.next();
if (answer.equalsIgnoreCase("n"))
System.out.print("Price is 30.50 per day.");
if (answer.equalsIgnoreCase("y"))
>This is what I'm looking for< mh_sh_highlight_all('java');
I am trying to create a program that allows me to enter 5 students numeric grade (0-100) to a letter grade (A, B, C, D, F) and I CANNOT use an array. When I try to run my program it says main class not found, and when I change the it from a string to a void in the main method it does not work.
Java Code:
import java.util.Scanner;
public class Week3ControlStatements2
{
public static String main(String[] args){
int numberGrade = 0;
int quotient = numberGrade / 10;
int remainder = numberGrade % 10;
[Code] ....
I've been writing a fraction class code below that does a number of arithmetic calcs and when I run it these are the results I get. My gcd doesn't work when it comes to negative fractions and I'm not quite sure how to print.out the boolean methods ((greaterthan)), ((equals))and ((negative)). I'm also not sure if I have implemented those 3 methods properly. I'm still learning how to do unit testing.
Enter numerator; then denominator.
-5
10
-5/10
Enter numerator; then denominator.
3
9
1/3
Sum:
-5/30
-0.16666666666666666
Product:
-5/30
-0.16666666666666666
Devide:
-15/30
-0.5
subtract:
-45/90
-0.5
negative:
1/6
0.16666666666666666
Lessthan:
1/6
0.16666666666666666
greaterthan:
1/6
0.16666666666666666
FRACTION CLASS
import java.util.Scanner;
public class Fraction
{
private int numerator; //numerator
private int denominator; //denominator
[Code] ....
With fields that holds a tax payer social security number, last name, first name, street address, city zip code, annual income, marital status and tax liability, include a constructor that requires argument that provide values for all other fields other than the tax liability. the constructor calculates the tax liability based on annual income and percentage in the ff table
Income
0-20,000
20,000-50,000
50,000 and over
marital status
single married
15% 14%
22% 20%
30% 28%
Write a method that returns the sum of all the elements in a specified column ina matrix using the following header:
Public static double sumColumn(double[][] m, int columnIndex)
Write a test program that reads a 3 by 4 matrix and displays the sum of each column.
import java.util.*;
public class SumColumns {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
final int ROW = 3;
final int COLUMN = 4;
[Code] .....
How do i make the 'date' column show only the date and 'timeIn' and 'timeOut' column only show the time. In my database table my 'date' column is a date type and 'timeIn' and 'timeOut' column is time.
View Replies View Relatedhow can i get id from db table for each column values with java or oracle query? i did get before each column content from file and now i need get the id of this column values from db. I read csv files from folder and then load the data from these files into subfolder, and here with line li = line.split(","); i get the values that i have in csv file and split them and become in li the value name, and then in else block i create a P objekt where i set this values from csv files, and with [I]p.setLid(li);
I set the value for all valuenames, and then get these valuenames in separate column with other content from this csv, and my question is, i need to do this with db, and write these csv file values to the table in db (it will be done with another java class), what i need, that to write the ids of these values into the table in db, instead of valuename, and while there is no ids for valuenames in csv files, i need to get the id from the table in db where these are already listed with sequences.
I don't know how can i write in data table the id of this valuenames and other content, this data table should contain the ids of valuenames timestamp values and the ids of the csv files name, i don't know how to do this with the ids, i must get the ids from the db table and then set these on [I]p.setLid(li); where i set early the valuenames, instead of valuenames i should set ids, that will set ids automatically for all these valuenames.
try {
while ((line = br.readLine()) != null) {
if (lc == 0) {
li = line.split(",");
} else {
String[] temp = line.split(",");
for (int i = 1; i < temp.length; i++) {
p = new P();
[code]....
i got the values that then will be given to [I]p.setLid(li); and iterate, but now i want to get id from the table in db where this values stored with id instead of this column values, how can i do it?
i want to write a program have a array 2d like that :
int array [][] = new int [3][3]
after that the user input value by using scanner then give summation of each column in matrix , i wrote this one
Java Code:
class MatrixSum{
public static void main(String[] args) {
int matrix1[][]= {{7,8,9},{1,5,2}};
int matrix2[][]= {{1,6,4},{2,7,3}};
System.out.println("Number of Row= " + matrix1.length);
System.out.println("Number of Column= " + matrix1[1].length);
int l = matrix1.length;
System.out.println("Matrix 1 : ");
for(int i = 0; i < l; i++) {
[code]...
but i want to change that the user input the value by using scanner.
I need to add a column to my array and copy an old array and then fill the new array with another array..However, unfortunately it does not work. I found this code online..but it seems it does not work.
static float[][] temperatures = new float[5][6];
static float[] d=new float[5];
float[][] neww;
int am,am1,am2,am3,res1,res2;
public static void main(String[] args) {
float[][] neww= Arrays.copyOf(temperatures, temperatures.length+1);
neww[temperatures.length]= new float[temperatures.length];
for (int i = 0; i < temperatures.length; i++) {
neww[temperatures.length][i] = Float.valueOf(d[i]);
}
i have to read a text doc that has 149392014080186 (station# year/month/day temp) many more following but i have to read the temp and determine if it is under 80 degress my code so far is the second scanner reads the text file i need the 1st scanner reads the user info
/******************************************************************************
*
* Filename : ClimateSummary.java.
* Description: This program computes summaries of climate data and reads if it is rainy/not rainy or cold/hot.
*
******************************************************************************/
//imports everything needed to run the program
import java.util.Scanner;
import java.io.*;
[code]....
Is it possible to pass column name as a parameter using servlets?
I tried using the following code but it doesnt work
String date=request.getParameter("date");
String sql="alter table cs1_cn add " +date+ " boolean";
PreparedStatement ps=conn.prepareStatement(sql);
i am trying to code the averages across column but I end up with the wrong averages.
My test cases:
name 0 1 2 3 overall grade
Badger,Bradley 37 70 51 48 68.66666666666667
Emu,Emma 35 81 75 40 72.83333333333334
Aardvark,Alice 42 85 22 0 65.11111111111111
Dodo,Donald exc 12 25 0 54.17391304347826
Cassowary,Cassie 50 97 72 68 62.758620689655174
My code:
public static double[] computeAllGrades(int[][] scoreTable, int[] itemPointValues) {
{
double totalPoints = 0;
double totalPointsPossible = 0;
double allGrades[];
double grade =0;
[code]....
I've been creating a jTable where I can add / edit /delete new entries. Now i have 2 Questions :
1) My column 0 is filled with the row-number. I created a variable and with each "add" it adds +1 to the variable. That works, but as soon as i delete 1 row there is a gap ( 1..2..4..5..).
My question: Is there another way then mine to handle this?
2) The table is/should be working as some kind of database. The user is able to add Information (height, width,...). Now I want to sum the entries of 1 column (length,...). But as they´re objects I didn´t find a way.
My question: How can I sum the entries of 1 column of a table?
how I can highlight one column with color? When i add color to a column the entire table is colored.
View Replies View RelatedHow can I get id from db table for each column values with java or oracle query? I did get before each column content from file and now i need get the id of this column values from db. I read csv files from folder and then load the data from these files into subfolder, and here with line li = line.split(","); I get the values that i have in csv file and split them and become in li the value name, and then in else block i create a P objekt where i set this values from csv files, and with [I]p.setLid(li); I set the value for all valuenames, and then get these valuenames in separate column with other content from this csv.
My question is, i need to do this with db, and write these csv file values to the table in db (it will be done with another java class), what i need, that to write the ids of these values into the table in db, instead of valuename, and while there is no ids for valuenames in csv files, i need to get the id from the table in db where these are already listed with sequences, and i don't know how can i write in data table the id of this valuenames and other content, this data table should contain the ids of valuenames timestamp values and the ids of the csv files name, i don't know how to do this with the ids, i must get the ids from the db table and then set these on [I]p.setLid(li); where i set early the valuenames, instead of valuenames i should set ids, that will set ids automatically for all these valuenames.
Java Code:
try {
while ((line = br.readLine()) != null) {
if (lc == 0) {
li = line.split(",");
[Code] ....
with
Java Code : li = line.split(","); mh_sh_highlight_all('java');
I got the values that then will be given to [I]p.setLid(li); and iterate, but now i want to get id from the table in db where this values stored with id instead of this column values, how can i do it?
Hiding the column but not removing , because i need to bring this column id to the next screen, only i do not want to show the column but internally it has to take the value to navigate the screen, but if i use below code, i am getting null pointer exception,
this.column.setMinWidth(0);column.setMaxWidth(0); column.setWidth(0); column.setPreferredWidth(0)
How can i left justify a column of several rows of names, then right justify them?
View Replies View Relatedimport java.util.Scanner;
public class ColumnSum {
public static void main(String[] args) {
Scanner s = new Scanner (System.in);
int userpick = 0;
int sum = 0;
int [][] matrix = {{5, 9, 87, 74, 12, 7}, // row 1
[code]...
Right now my code gets all the numbers in a row and adds those up, but I want it to get the numbers in a column and add them instead. The problem is I don't know how to get the userpick (the number that the user picks to determine which column gets added) to be set to that particular column.
I have a JTable with the model " Names " , " Quantity " and " Unit " .
I'm coding a program where you get the ingredients names.
So i need to get the whole row of one column and String it all up together,because i need to store it in mySql and i have already set it all as String.
how i can do this ?
My code are as follows :
JTable Code:
DefaultTableModel model = (DefaultTableModel)table.getModel();
if(!txtQty.getText().trim().equals("")){
model.addRow(new Object[]{ingCB.getSelectedItem().toString(),txtQty.getText(),unitCB.getSelectedItem().toString()});
}else{
JOptionPane.showMessageDialog(null,"*Quantity field left blank");
}
Getting the values and for storing :
for(int i = 1; i<= i ; i++){
ingredients = table.getName();
}
This is for loop is wrong and it does not work because i have a constructor to take in Ingredients but because it is inside the loop, it cannot take it in.
personid gender height class
1 female 1.6 short
2 male 2.0 tall
3 male 1.85 medium
4 female 1.9 medium
5 male 1.7 short
6 female 1.8 medium
7 female 1.95 medium
for eg i have to find minimum and maximum height from column height.
Is it possible to get the value(like numbers) from column of table and get sum or total?
View Replies View RelatedI have a ace:dataTable which contains a variable number of columns. For this I use the c:forEach tag. All generated in the c:forEach are not displayed. In the sample, only columnLibelle and columnSum are displayed.
<?xml version="1.0" encoding="UTF-8"?>
<!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"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
[Code] ....
I try to run this query select distinct TRIM(company) from catalog where company != '' order by company asc; and i get an SQL exception that Column company not found.. When i run this query in MySql workbench it works fine?
View Replies View RelatedI am trying to merge two files together using the Apache Commons CSV library. I figured it was easier to use this than to write my own implementation.
The first problem is that the output contains the underlying class logic and as a results my output contains a bunch of un-needed data. How do I get rid of this? I just want the column and row data, nothing else.
Example
I want this:
customerNo, firstName, lastName, birthDate, mailingAddress, married, numberOfKids, favouriteQuote, email, loyaltyPoints
1, John, Dunbar, 13/06/1945, 1600 Amphitheatre Parkway Mountain View, CA 94043
But I get this:
CSVRecord [comment=null, mapping=null, recordNumber=1, values=[customerNo, firstName, lastName, birthDate, mailingAddress, married, numberOfKids, favouriteQuote, email, loyaltyPoints]]
CSVRecord [comment=null, mapping=null, recordNumber=2, values=[1, John, Dunbar, 13/06/1945, 1600 Amphitheatre Parkway
Mountain View, CA 94043
The second problem is that I just want the row Headers from the first file, but the row headers from my second file are still being included in my output. I used withSkipHeaderRecord(true), but it didn't have the desired results.
Code is below.
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.ArrayList;
[Code] .....