How can i do this in best way, i what to avoid infinite loop .....
The use case is i get value from use and query value from database,sometime use can send value which return null in database,i what to avoid those null value .....
Basically I have to enter 5 numbers that I put through a loop and they print the star * depending on the number.An example would be this 5:*****. However, my codes prints out 5:*; 5 times. How to correct my code
Java Code:
import java.util.Scanner;
public class IntegerOutput
{
public static void main( String args[] )
{
Scanner input = new Scanner( System.in );
int num1;
int num2;
int num3;
int num4;
int num5;
[code]....
So I have been busy at some projects lately. One of them having this projectill put up the full code and the part i have problems with:
package relax;
//importeverything
import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
[code]....
There is some kind of issue here.in the gui it will ask you to give points in time (ms) it wants to click for you, although when for example i put in 3 at "How Much Clicks" it asks 4 times and then exits with an error.Here is the error:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3
at relax.Relax.StartSetup(Relax.java:175)
at relax.Relax$2.actionPerformed(Relax.java:78)
at javax.swing.AbstractButton.fireActionPerformed(Unk nown Source)
at javax.swing.AbstractButton$Handler.actionPerformed (Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed (Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
[code]....
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
Write a java program that uses a While loop and persistent output to count down from 33 to 0 by threes, and put each value on a separate line, also do this in for loop.
View Replies View RelatedI just started playing around with Java for awhile, but got caught up in a problem when using ArrayList.
CinemaAppMain
public class CinemaAppMain {
public static void main(String[] args) {
new CinemaApp().start();
[Code]....
I am trying to get the movie name and theatre title from their ArrayList, and I know I need to go through the movie list & theatre list to find their name & title, and compare it with the user input and print out the result.
I use for(int i=0;i<movies.size();i++) to go through the the movie list, and I tried using for(int i=0;i<theatres.size();i++) to go through the theatre list. But when I printing multiple time with different user input value, it will show me strange result (screening have same movie name & theatre name, the else if statement is printed below the user input, user input is printed more than once after the first time).
Edit: I know its wrong for me to use nested for loop,if not, another solution is needed to get the item inside both of the list. (getting the "title" from movie list & "name" from theatre list)
I need to do a simple while loop pay calculator. I am very new and not sure what I need to do to put all the requirements in the new code from another code. Here is my code that doesn't work yet.
1.Place the wage calculation routines in a while loop.
2.Allow the user to input an individual's hours worked.
3.Accumulate the total regular hours worked, the overtime hours worked, the amount of the regular pay, the amount of overtime pay, and the total payroll, for all of the employees entered.
4.Allow the user to enter a zero (0) as the Boolean expression to end the loop.
5.When the loop ends print out all of the accumulated totals with appropriate labels, each on a separate line.
import java.util.Scanner;
public class WhileLoopPayCalc
{
public static void main(String [] args) {
final double REGULAR_HOURS = 40f;
final double HOURLY_WAGE = 12.5f;
final double OVERTIME = 1.5f;
double wage = 0f;
[Code] ....
The assignment is: A machine purchased for $28,000 is depreciated at a rate of $4,000 a year for seven years. Using a for loop, write and run a Java program that computes and display a depreciation table for seven years. The output should look like:
DEPRECIATION SCHEDULE
------------------------------------------------
YEAR DEPRECIATION END-OF-YEAR ACCUMULATED
VALUE DEPRECIATION
---- ------------ ---------- ------------
1 4000 24000 4000
2 4000 20000 8000
3 4000 16000 12000
(and so on until year reaches 7)
I did attempt it. I'm just extremely stuck and don't know how to move forward. My code is below:
import java.util.Scanner;
public class Depreciation_for
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
int number = 1;
[Code] .....
The assignment is: A machine purchased for $28,000 is depreciated at a rate of $4,000 a year for seven years. Using a for loop, write and run a Java program that computes and display a depreciation table for seven years.
The output should look like:
DEPRECIATION SCHEDULE
------------------------------------------------
YEAR DEPRECIATION END-OF-YEAR ACCUMULATED
VALUE DEPRECIATION
---- ------------ ---------- ------------
1 4000 24000 4000
2 4000 20000 8000
3 4000 16000 12000
(and so on until year reaches 7)
I did attempt it. I'm just extremely stuck and don't know how to move forward. My code is below:
import java.util.Scanner;
public class Depreciation_for
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
int number = 1;
[Code] .....
I was learning looping in Java and decided to try this code and then I encountered an endless loop of 2s. why is that? I believe this line count=count++ caused it.
class ForDemo{
public static void main(String []args){
int count;
for(count=2;count<=5;count=count++)
System.out.println("count is:"+count);
System.out.println("Done!");
}
}
I am trying to execute the following method: This method takes a delivery date as one of the arguments and a list of calendar holidays as another argument. If the delivery date is present in the holiday list, I will add 1 day more to the delivery date and check again if the new delivery date is part of holiday list.
Issue is that the last 3 statements before 'return' are getting executed multiple times though there is no for or while loop. Why they are getting invoked multiple times.
@SuppressWarnings("rawtypes")
private String fetchNextWorkingDay(String sDeliveryDate, Element eleCalendarDayExceptions, SimpleDateFormat sdf, Format formatter) throws Exception {
System.out.println("");
System.out.println("Inside fetchNextWorkingDay method");
System.out.println("Del Date to compare is "+sDeliveryDate);
Boolean isDateSet = true;
[Code] .....
I am trying to print a loop inside an array of a greater size than the loop itself. Like for example I have an array of size 7 but it has only 3 elements.
int[] array=new int[7]
array[0]=2;
array[1]=3;
array[2]=4;
now what I want to do is print these three numbers in a loop so that my array[3]=2;array[4]=3;array[5]=4 ...... till the last one. Also the array could be any size and not just 7.
Here'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.
I have everything else working. My problem is that when i type "quit" to close the outer loop. It still runs the inner loop. The National Bank manager wants you to code a program that reads each clients charges to their Credit Card account and outputs the average charge per client and the overall average for the total number of clients in the Bank.
Hint: The OUTER LOOP in your program should allow the user the name of the client and end the program when the name entered is QUIT.In addition to the outer loop, you need AN INNER LOOP that will allow the user to input the clients charge to his/her account by entering one charge at a time and end inputting the charges whenever she/he enters -1 for a value. This INNER LOOP will performed the Add for all the charges entered for a client and count the number of charges entered.
After INNER LOOP ends, the program calculates an average for this student. The average is calculated by dividing the Total into the number of charges entered. The program prints the average charge for that client, adds the Total to a GrandTotal, assigns zero to the Total and counter variables before it loops back to get the grade for another client.Use DecimalFormat or NumberFormat to format the numeric output to dollar amounts.
The output of the program should something like this:
John Smith average $850.00
Maria Gonzalez average $90.67
Terry Lucas average $959.00
Mickey Mouse course average $6,050.89
National Bank client average $1,987.67
Code:
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String name = "";
int charge = 0;
int count = -1;
int total = 1;
int grandtotal = 0;
int average = 0;
[code]....
I am trying to write a loop that calculates the distance traveled (distance = speed * time). It should use the loop to calc how far the vehicle traveled for each hour of time. My program asks for hours and then mph but its not calculating time * speed. Here is my code.
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter Hours Traveled ");
int hoursTraveled = input.nextInt();
System.out.println("Enter MPH ");
int mph = input.nextInt();
[Code] .....
Four experiments are performed, each consisting of six tests. The number of test results for each experiment is entered by the user. Write a Java program using a nested loop to compute and display the average of the test results for each experiment.
You can run the program by entering the following test results:
Experiment 1 results:23.231.516.927.525.428.6
Experiment 2 results:34.845.227.936.833.439.4
Experiment 3 results:19.416.810.220.818.913.4
Experiment 4 results:36.939.549.245.142.750.6
How to convert this program from a while loop to a for loop.
import java.util.Scanner;
public class LongDivision {
public static void main(String arguments[]){
Scanner input = new Scanner(System.in);
System.out.println("Enter the dividend: ");
[Code] ....
How do I convert my for loop below to a while and do while loop?
for(int a=1;a<=9;a++){
for(int b=1;b<=a;b++){
System.out.print(a);
}
System.out.println();
[Code] .....
I am trying to make a program add values from a loop. So what its supposed to do is search through tokens on an imported file. The file lists State, Capital, and then capital population. Then take the population string, turn it into numbers, and then do stuff with the numbers. First I'm supposed to find the Highest and lowest population of the places in the file (which I did without problem), but the finally thing is I'm supposed to add each found population to the last so I can find the average of the populations.
I just cannot seem to grasp how to do that. I THINK I'm supposed to some how store the given value into a variable, but how do I get that variable to add to the new value?
like...?
Get token -> a
b = a
c = a + b
or wait no.....
Java Code :
import java.io.*;
import java.util.Scanner;
public class CapPopS
{
public static void main(String[] args) throws IOException
{
File stateCAP = new File("state-capital-2004population.txt");
if (!stateCAP.exists())
[Code] ....
My teacher wants me to make a program that counts the amount of steps a student takes a day. The program asks for other info such as name, age, college. However I need to write a loop that will allow the user to enter how many ever steps they took and convert them to miles.how exactly to make the steps entered by the user within the loop be their own individual days like monday tuesday etc. Like the loop will ask how many steps did you take monday.. tuesday.. etc for each time it runs.
package StudentInfo;
import java.util.Scanner;
public class studentinfo {
public static void main (String [] args){
Scanner scan = new Scanner(System.in);
[code]....
I need to write a program that measures how long it will take someone to make a million dollars if he is being paid $5.75 an hour, but the pay rate is increase by 0.2% each week after the third week.
View Replies View RelatedThis is the first time I've ever gotten an infinite loop with a FOR loop. This program is supposed to let you enter five integer numbers and draw a bar chart based on those numbers. After the fifth number is entered, guess what? It wraps back around to zero again and starts over! Why the bleep doesn't it stop? The code is below:
Java Code: import java.awt.Graphics;
import javax.swing.JPanel;
import java.util.Scanner;
[Code]...
Can i write inner if loop without { and } if it has more lines of code as below
public class TEst111 {
/**
* @param args
*/
public static void main(String[] args) {
int num=11;
// TODO Auto-generated method stub
if (num < 10)
[code]....
I tested to see outer if which does not need { and } even though it has multiple lines in that
I just started to teach myself loops. I am trying to convert the while loop into for loops, however somehow I do not get the same printout.
While loop:
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
int i = 1;
int sum = 0;
[Code] ....
Print:
sum is 0 and i is 1
sum is 1 and i is 2
sum is 3 and i is 3
sum is 6 and i is 4
Create a loop where you add the integers from 1 to 50.
public class Sum50 {
public static void main(String[] args) {
int sum = 0;
int max = 50;
for(int i = 0;i <= max; i++){
sum=sum+i;
}
System.out.println("Sum is " + sum);
}
}
I'm fairly new to programming, just started yesterday with a book I downloaded of the net. The book comes with a couple of examples on how to code and they all seem to work fine except for this loop.
class fordemo {
public static void main(String args[] ) {
int count;
for(count = 0; count < 5; count = count+1);
System.out.println(" This is count: " + count);
System.out.println("Your are all done! ");
}
}
I can't seem to find the problem. All it gives me is,
"This is count: 5
You are all done!"
When it's supposed to give me,
"This is count: 1
This is count: 2
This is count: 3
This is count: 4
You are all done!"
Found the error, semicolon after the for loop is not necessary. Should be...
class fordemo {
public static void main(String args[] ) {
int count;
for(count = 0; count < 5; count = count+1)
System.out.println(" This is count: " + count);
System.out.println("Your are all done! ");
}
}