I am trying to increment a variable named counterVariable each time it goes through a for enhanced loop. It is stuck on 0.
Java Code:
valuesProcessor:
for(String[] row : values) {
for(String col : row) {
int counterVariable = 0;
if(col == null)
break valuesProcessor;
[Code] .....
So I need to make a for loop for this problem: A certain type of bacteria doubles its population every twelve hours. If you start with a population of 1000, how many hours will it take for the population to exceed 1,000,000? Output needs to be in table format, such as:
Hours: - Population:
0 ------- 1000
12 ----- 2000
24 ----- 4000
I've created the code, but don't understand how to increment hours by 12 and double the population by 2 each time.
public class Population
{
public static void main (String[] args) {
int hours = 0;
int population;
[Code] ....
I want something like this:
there are two enhanced for loops:
for(Beat beat:b.getBeats()){
for(String name:b.getNames()){
// i want these loops to stop here and wait for user to write something in the textfield.
// perform a single iteration
// do some other task i.e getting the text from textfield and setting to to something
// repeat above process
}
}
How can I control this loop in such a way? The part I'm having trouble with is that how to bound loop to wait for user input and the perform next iteration
I want something like this:
there are two enhanced for loops:
for(Beat beat:b.getBeats()){
for(String name:b.getNames()){
// i want these loops to stop here and wait for user to write something in the textfield.
// perform a single iteration
// do some other task i.e getting the text from textfield and setting to to something
// repeat above process
}
}
How can i control this loop in such a way? The part I'm having trouble with is that how to bound loop to wait for user input and the perform next iteration.
how does this nested enhanced for loop execute? I dont know how to indent the code.
for (String exam : exams)
for (String level : levels)
for (String grade : grades)
System.out.println(exam+":"+level+":"+grade);
Note:
exams,levels,grades are arraylist
exams contain Java,Oracle
levels contain Basic,Advanced
grades contain pass,fail
I've tried a couple ways to do it, and they don't work. I'm aiming for functionality like I got with the regular for loop, but from an enhanced for loop. Is this simply beyond the scope of an enhanced for loop, or am I just not getting the right syntax?
TestObject to1 = new TestObject("first", 11);
TestObject to2 = new TestObject("second", 12);
TestObject to3 = new TestObject("third", 13);
TestObject to4 = new TestObject("fourth", 14);
TestObject to5 = new TestObject();
List<TestObject> testList;
testList = new ArrayList<TestObject>();
[code]....
The TestObject class is simply an int and a String, with getters getInt and getString. It all works fine with the regular for loop.
edit: I should probably mention that I know what I have in the enhanced for loop now will only display the class name and the hash. I've tried adding the .getString and .getInt, and tried a few other ways to make it work. I just reverted to this because it compiles and runs
I've a simple logic Code to increment a variable from javascript and Send it back to jsp. I just writing simple code to explain the logic. My code will have scritplets. I know usage of scriptlets is inside jsp is oldest but for the sake of logic.
<!--Jsp Page -->
<%
int i=0;
<input type="button" onclick="fun()"/>
%>
<!-- Script as Follows-->
<script>
function fun(){
<%i++;5>
}
</script>
But My value of i is not incrementing its showing that function is undefined
I'm trying to display an columns and rows. The first column has integers and the rest are doubles. The initial calculations are correct, but I cannot figure out how to total last column, which is interest paid, and then start the iteration over.
int paymentNumber;
//print out the colum labels
System.out.printf("%7s %9s %10s %8s %15s %n", "Payment", "Interest"
, "Principal", "Balance", "Interest Paid");
System.out.print(" "); //put three blank spaces first
//Test For Loop Output:
for ( paymentNumber = 1; paymentNumber <= period*12; paymentNumber++) {
[Code] .....
Here's the output: It displays the payment number correctly. Am I supposed to write a for loop for each column?
run:
Please enter the amount of the loan:
1000
Please enter the interest rate:
1
Please enter the loan period in years.
1
Your Monthly Payment is:$83.79
[Code] ....
if I move object A to one area of the screen I want object B to to move to object A's location but I also want object B to move at a fixed speed (movement variable). How do I go about doing this? Both the x and y coordinates of object B would need to know the coordinates of object A to calculate the distance between the two and to determine how much of which axis to increment/decrement (if that makes sense?) with the inclusion of the speed variable.In other words I'm just trying to create a homing object.
View Replies View RelatedHere's the code: it's while loop inside a for loop to determine the proper length of a variable:
for (int i = 0; i < num; i++) {
horse[i]=new thoroughbred();
boolean propernamelength = false;
while (propernamelength==false){
String name = entry.getUserInput("Enter the name of horse "
[code]....
I was just wondering what was going on here -- I've initialized the variable, so why do I get this message? (actually the carat was under the variable name inside the parentheses.
Is it possible to write a program that changes the value of a certain variable when a certain predefined time arrives, without running the same loop over and over again (and stucking the computer)?
View Replies View RelatedI am new to programming so for loops are a little confusing to me still but basically what I am doing is making a small java rpg game and I want to add in a time element to it so your character gets things like promotions and such after a certain amount of time playing.
for (int x = months; x < 12; years++) {
for (int y = weeks; y < 4; months++) {
for (int z = days; z < 7; weeks++) {
for (int j = hours; j < 24; days++) {
for (int k = minutes; k < 60; hours++) {
}
}
}
}
}
That's what I have so far but I am getting a logical error/ infinite loop when I run. I have added each unit of time as a static variable so there's no problem there.
How can I time my while loop to executeevery 3 seconds?
Here is my code:
class Info{
public String name;
public String version;
public String arch;
double CPUSpeed;
};
Info info = new Info();
Info[] queue = new Info[100];
[Code]...
I seem to have done it right, but it doesn't work... What is wrong?
The concept is simple. I wish to know how I could replicate a variable using a for loop which will have a new number assigned. Essentially, as the loop progresses it would create a copy of the same variable with a number at the end. Once
Something like this, variable1, variable2, variable3, variabl4, variable5
Once I have my five variable I will then be able to print them out
import java.util.Scanner;
public class replicating_variable {
public static void main(String[] args) {
String variable1;
Scanner input = new Scanner(System.in);
for(int i = 0; i < 5; i++){
[Code]...
There's loads of problems with this. What I'm trying to do.
1) get a program to add the contents of an array together, preferably with a for loop and not the heavy handed version I've tried to use here.
2) get the for loop's output just once, since it won't compile or recognise the variable outside of the loop. How do I make the loop's 'counter' variable available everywhere?
public class retint {
public static void main(String[] args){
int[] onetoTen = {1,2,3,4,5,6,7,8,9,10};
for (int i=0; i<10; i++) {
int counter = (onetoTen[0] + onetoTen[1] + onetoTen[2] + onetoTen[3] + onetoTen[4] + onetoTen[5] +
onetoTen[6] + onetoTen[7] + onetoTen[8] + onetoTen[9]);
System.out.println(counter);
}
}
Terrible code, I know. There has to be a more efficient way.
I am trying to create program that will append letters in "sb" variable using StringBuilder until num "0" isn't entered
But something is strange. Every letter I need to enter twice. Tried with "while" and "do while" loop, but same result.
package v0502;
import java.util.Scanner;
public class stringMain {
public static void main(String[] args) {
StringBuilder sb = new StringBuilder();
[Code] ....
I am working on an assignment that I can't seem to figure out the final part to. The program takes in course data such as the time the class starts and how long it lasts. The time is in military time (0000 - 2400)
I need the output time to be the time the class started, plus the length of the class, and displayed in military time.
for example,
Start Time = 0930
Length = 50 minutes
Endtime = 1020
I can't for the life of me figure out how to do this. I have gotten a program that works for this time and minutes, and displays the correct 1020. But when I change the information to say
Start time: 0700
Length = 90 minutes
I get:
Endtime = 90
90 is technically correct, the way the formula is setup, but I need it to display 0900 not 90.
Here is the code that I have. Be easy, I'm still learning, and this is just the file I created to get the formula to work. Also, the verbose in here is just for my own debugging to make sure values should be what I'm expecting them to be.
public class calc
{
public static void main(String[] args) {
double hours, minutes, length;
double temp;
int time = 2400;
hours = time / 100;
System.out.println("Hours are: " + hours);
[Code] ....
I have a question related to the code below, that I do not understand. The aim is to count all files and subdirectories in an ArrayList full of files and subdirectories. So I have to count every file and every subdirectory.
The code concerning counting files is clear to me - every time d is of the type file I have to increment n by one. However I thought that I have to do the same thing in case d is a directory, so I would have written the same code for directories.
So what does "n += ((Directory) d).countAllFiles();" mean? In my understanding the method countAllFiles() is applied again on the object Directory ( as Directory is the class that contains this method), but how is n incremented by this? I thought n should be incremented by one as we did with files.
public int countAllFiles() {
int n = 0;
for(SystemFile d : content) {
if(d instanceof File) {
n++;
[Code] ....
I'm attempting to increment the values by 1 in an array of objects but I'm not able to increment with the increment operator.
for(int i=1;i<a.length;i++){
a[i].getHour(); hour = hour++;
a[i].getMin(); miinute = minute++;
a[i].getSec(); sec = sec++;
}
It just loops the value of hour without incrementing.
I have the following:
public class HistoricalMoment{
private String eventName;
private ClockDisplay timeOfEvent;
public static final int MIDNIGHT_HOUR = 00;
public static final int MINUTE_ZERO = 00;
}
How can I create a method called public void addMinuteToTimeOfEvent() which calls the timeOfEvent's increment() method to add one minute to the timeOfEvent?
I have a code issue and I have a below question for the same.Assuming data[] is of type byte[], is the below statement in java -
while((data[p++] & 0x80) == 0x80);
same as -
while ( (data[p] & 0x80) == 0x80 ) { p++; }
I tried with do { p++; } while ( (data[p] & 0x80) == 0x80 ); That also doesn't seem to be the same thing. I am not putting code around this but essentially if I make this change for not using data[p++] code stops working!
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
import javax.swing.*;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.*;
public class IncrementDecrementPanel extends JPanel {
[Code] ....
I need open a url every time I want to refresh system with an update. Each update has a number so my urls are url1, url2, url3, ... I know how to put it in a loop to increment the urls in a String. I do not know how to make it open and close the url in a browser.
public class Test {
public static void main( String args[]) {
for (int i = 201; i < 300; i++){
System.out.println("http://url=" + i);
[Code]....
The program shall assign a new employee ID to the employee and display it on the screen.
The employee ID shall be generated by adding 1 to the largest employee ID already in the employee.txt data file.
You can see I've tried variations of identification++ but have not been successful. I've also tried to get the last or the highest identification in the arrayList but have not done that right.
public static void addEmployee() {
String firstName = Validator.getString(
sc, "Enter First Name: ");
String lastName = Validator.getString(
sc, "Enter Last Name: ");
int identification = 0;
[Code] ....
I also can display all of the employees their identifications and their punches but I cannot narrow it down to searching one employee and displaying information for just the one.
-If the selected value is ‘I’, prompt the user to enter the employee’s ID number.
-If ‘I’ is selected the display shall show the employee’s name and ID, list out each day worked in chronological order, the number of hours worked that day and a total number of hours worked in the two week period.
The report shall prompt the user to re-enter an employee ID of it does not exist in the employee file.
private static void displayReports() {
System.out.println("Report");
Scanner sc = new Scanner(System.in);
String action = " ";
while (!action.equalsIgnoreCase("d"))
[Code] ....
Java Code:
char array[] = new char[10];
int i = 0;
array[i++] = (char)('A' + i);
System.out.println("char for array is: " + array[0]); mh_sh_highlight_all('java');
However, the result for array[0] is B. Not A. from my understanding, the array[0] should be 'A'.
So I'm trying to make a bar graph, each bar will increment the height by about 10 pixels. To do this, I'm making an array of bars. For some reason, using fillrect I cannot not increase the size more than 10 by 10, if I do, it will only show the 10 by 10. I want the bars to increase in height by 10 each time.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class AssortedAssortmentsOfSorts extends JFrame
[Code] .....