Loop That Calculate Distance Traveled - Why Java Not Printing Method Results

Apr 13, 2014

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] .....

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Java Program - Distance Traveled (Formatting And Decimal Place)

Apr 10, 2014

I'm having trouble formatting my output and issues with the decimal places. Here's my code:

import java.util.Scanner;
import java.text.DecimalFormat; // Imports DecimalFormat class for one way to round
 public class lab3 {
public static void main(String[] args) {
String heading1 = "Hour", heading2 = "Distance Traveled";
int timeElapsed, hour, speed;

[Code] ....

And here's my output (Click on the image since it's pretty small):

javaIssues.png

Issue:
1) The Hours 2 and 3 aren't aligned to 1.
2) The 80 and 120 in Distance Traveled have 6 decimal places when it should not have decimals.

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Java Program Method To Calculate Distance

Feb 20, 2015

Write method distance, which calculates the distance between two points (x1, y1) and (x2, y2). All numbers and returned values should be of type double. Incorporate this method into an program that enable the user to enter the coordinates of the points, then calculate and display the distance by calling the method –distance.

I've tried numerous times to make it work and I'm on the right path, however I'm missing some things in the code to make my results look like this later on, which I've attached onto this post.

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Printing Results From A Method

Apr 27, 2014

I need to print certain information from an arraylist depending on the arguments the method has. I'm trying to print the last 3 methods from the database class but nothing is printing and I don't know what the problem is.

package hw3;
import java.util.*;
public class Driver {
public static void main(String[] args){
/* Comments required
PersonFileReader pfr = new PersonFileReader("person.dat");
ArrayList<Person> testData = pfr.readData();
Database db = new Database(testData);
*/

[Code] .....

On the driver class I just print what the methods from the database class do.

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Modify DrawShape Method To Calculate Distance From Starting Point

Mar 13, 2015

I need to modify the drawShape method to calculate the distance from the starting point (the diameter) of any shape regardless of how many sides I give it, but I have absolutely no clue where to begin with this. The ultimate goal of the program is to calculate the value of pi using the shape that is drawn.

Java Code:

public class PiTurtle extends Turtle
{
private double mySize;
private int mySides;
private double diameter = 0;

[code]....

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Method Parameters - Two Fields Of Type Double / Calculate Distance To Another Point

Oct 18, 2014

I've just been having a go at an exercise where I have to create and use a class called Point, with two fields of type double. I have to create some methods for it, one of which is a distanceTo(Point) method, that calculates the distance to another point. I've tried to keep the distanceTo(Point) method short so have created some other methods to use within the method. My question is about the getDistance() method that I've made. As you can see below, I've given it two parameters, which are references to values within two Point objects (this.x and otherPoint.x).

double distanceTo(Point otherPoint) {
double distanceX = getDistance(this.x, otherPoint.x);
double distanceY = getDistance(this.y, otherPoint.y);
return calculateLength(distanceX, distanceY);
}

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Print Route Method / Stuck In A Loop Of Printing Same Two Nodes

Nov 13, 2014

My issue is that when I run my search, it does find a goal. However, when I try and print the route using my print route method, it just gets stuck in a loop of printing the same two nodes. What is wrong with My A* implementation?

package search;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
 
[code]....

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Java Program Using Nested Loop To Compute / Display Average Of Test Results For Each Experiment

Apr 2, 2015

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

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Calculate Distance From Starting Point Of Any Shape

Mar 13, 2015

I need to modify the drawShape method to calculate the distance from the starting point (the diameter) of any shape regardless of how many sides I give it, but I have absolutely no clue where to begin with this. The ultimate goal of the program is to calculate the value of pi using the shape that is drawn.

Here is the code:

public class PiTurtle extends Turtle
{
private double mySize;
private int mySides;
private double diameter = 0; 
final static double startX = 590.0;
final double startY;
public PiTurtle(int nSides)

[Code] .....

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Calculate Distance Between Two Coordinates And Determine How Much Of Which Axis To Increment / Decrement

Feb 1, 2015

Basically I'm looking for a way to make one object follow another. For example, 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.

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Calculate Distance Between Two Points - All Numbers And Return Values Should Be Of Type Double

Jul 8, 2014

Write method distance to calculate the distance between two points (x1, y1) and (x2, y2). All numbers and return values should be of type double. Incorporate this method into an application that enables the user to enter the coordinates of the points.

Hints:

- The distance between two points can be calculated by taking the square root of

( x2 - x1 )2 + ( y2 - y1 )2

- Use Math class methods to compute the distance.

- Your output should appear as follows:

Type the end-of-file indicator to terminate

On UNIX/Linux/Mac OS X type <ctrl> d then press Enter

On Windows type <ctrl> z then press Enter

Or Enter X1: 1

Enter Y1: 1

Enter X2: 4

Enter Y2: 5

Distance is 5.000000

Type the end-of-file indicator to terminate

On UNIX/Linux/Mac OS X type <ctrl> d then press Enter

On Windows type <ctrl> z then press Enter

Or Enter X1: ^Z

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Calculate Shipping Charges Based On Product Weight In Pounds And Distance In Miles

Mar 26, 2014

I want to write a Utility to calculate the shipping charges based on the product weight in pounds and distance in miles. How we can go about it.

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Unable To Print Out Results Of Program That Calculate Number Of Seats

Nov 11, 2014

I'm trying to print out the results of a program that calculates the number of seats the parties will get in an election.I have to print the partial results and the national results.

I can print te number of seats per party in each constituency, but how can i sum all seats per party in each constituency and print the national results?I'm working with vectors, which I know it might not be the best option, but everything is working, except the fact that I can't loop throuhg the vector and retrieve the total sum per party.Like, adding the seats for labour party in Constituency A and B and C, etc, and print the sum. And do the same for conservative party.Is it possible, or doIhave to create a method in Parties class to solve the problem?

This is what I have now.

for (Parties p : h.geral) {
show += String.format("Constituency - %5s - %5s - %d%n",
p.getConstituency(), p.getParty(), p.getNum_seats());
}

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Converting Long Values To String - BufferedWriter Not Printing Desired Results

Apr 20, 2014

Currently, my program converts Long values to String. And when I test it out, it do print out the correct output. However, when the converted String value is passed over to be written in a text file, it seems that BufferedWriter isn't printing out the outcome that it's supposed to be.

saltVs = Long.toString(saltV);
System.out.print(saltVs); //will print out 79723172

Now the problem is here...It only prints out the last digit of the String value (instead of 79723172).

Here is my FileWriter/BufferedWriter part.

Why is that when I run my program using command prompt, it prints out the output that I wanted, but however when it comes to writing to the file, it doesn't come out right.

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Scanner Closed - Import Via Keyboard Numbers And Calculate Mean And Standard Deviation To Results

Oct 24, 2014

The purpose of this program is to import via keyboard Numbers.txt and calculate the mean and standard deviation to Results.txt.I am able to get the mean calculate but when I open the Results.txt the standard deviation is 0. I don't know what is wrong with my code, but I believe it has something to do with the scanner being close. Here is the error message i receive after inputting Numbers.txt.

java.lang.IllegalStateException: Scanner closed
at java.util.Scanner.ensureOpen(Unknown Source)
at java.util.Scanner.hasNext(Unknown Source)
at StatsDemo.main(StatsDemo.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)

Java Code:

import java.text.DecimalFormat; //for number formatting
import java.util.Scanner; //for keyboard input
import java.io.*; //for using files
public class StatsDemo
{
public static void main(String [] args) throws IOException

[Code] .....

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Dijkstra's Algorithm With Priority Queue - Method To Find Minimum Distance Is Nonfunctional

May 14, 2014

I was given some code by a professor to add some features to as part of an assignment. However, the code itself doesn't seem to work.

import java.util.HashSet;
import java.util.InputMismatchException;
import java.util.PriorityQueue;
import java.util.Scanner;
import java.util.Set;
public class DijkstraPriorityQueue

[Code] ....

The method to find minimum distance is nonfunctional...I receive an error that the types are incompatible. I can't do the assignment if the base code doesn't work to begin with...

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How To Print Results Of Method To A File Using PrintWriter

Apr 29, 2015

private static void getTablas(int num) {
//ciclos anidados
System.out.print("x");
//linea horizontal
for (int i = 1; i <= num; i++) {
System.out.printf("%3d ",i);

[Code] .....

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Exam Results - Code Should Split Results In Stars In 4 Categories

Nov 30, 2014

I'm doing a program where a user enters in exam results for students. Once he's entered the code, the code should split the results in stars in 4 categories.

I am working with a while loop that prints out infinite results. What I want to do is, if the user enters 2 digits, say "12", it should output 1 "*".

If the user enters "21" and "22", it should output "**".

There are 4 categories of marks which are marked with ints range1, range2, range3 and range4, which are user enter digits. Part 1 of the code is to split the user entered digits into its correct ranges. the ranges are 0-29, 30-39, 40-69 and 70-100. I've done the part where when the user enters a digit, it goes into the correct variable. After that when the user enters a digit over 100, the enter results should show up as stars. For example

Enter number =

21
22
44
66
44
23
11
111 (the 111 is where the program breaks and moves on)

So it should then display

0-29 ****

30-39

40-69 ***

70-100

Whatever I'm trying, it displays an infinite amount of stars. If I try to use break, It only outputs a single star, no matter how many digits I enter

Here is the code

int mark = 0;
int range1 = 0, range2 = 0, range3 = 0, range4 = 0;
int count1 = 0, count2 = 0, count3 = 0, count4 = 0;
while (mark >=0 && mark <=100) {

[Code] .....

"The problem is with the while loop, the one above is something I was experimenting with "

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JOptionPane Printing From A For Loop?

Feb 13, 2015

I am writing a program that has to do with ciphers and cipher shifts. The program itself works fine, but I am having trouble printing out the answers to JOptionPane. I know the basics of JOptionPane, but my problem is this:

Majority of my program takes place in a for loop, and resolves the cipher (it is a basic cipher program) 1 digit at a time. So, only the last DIGIT (I don't know how to convert a digit to a CHAR in JOptionPane) is printed to JOptionPane. Here is my code:

public static void main(String[] args) {
String cipher = JOptionPane.showInputDialog(null,
"Please enter a sentence or word that you wish to encode or decode. This program uses " + " a basic cipher shift.");
int answer = 0;
String upperCase = cipher.toUpperCase();
char[] cipherArray = cipher.toCharArray();

[Code] .......

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Recursive Method - Calculate Greatest Common Divisor Using Euclidean Method

Apr 29, 2014

Consider the following recursive method that calculates the greatest common divisor using Euclidean method.

PHP Code:

public static int GCD ( int x , int y )
{
    if ( y == 0 )                        
        return x;
    else if ( x >= y && y > 0)
        return GCD ( y , x % y );
    else return GCD ( y , x );  


Trace the above method for x=32 and y=46

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Nested For Loop - Pattern Printing

Feb 13, 2014

I don't know how to write a program based on for loop like pattern printing.etc

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Printing Each Value In Multidimensional Array Using For Loop

Dec 5, 2014

I want to print each value in the multi-dimensional array using a for loop but there is a problem.

Here is the script:

Java Code:

public class LearningJava
{
public static void main(String[] args) {
int[][] Grid = {
{12, 24, 36, 48, 60},
{1, 3, 5},
[Code] ....

Printing i: 0, x: 12
Printing i: 0, x: 24

Exception in thread "main" Printing i: 0, x: 36

Printing i: 0, x: 48
Printing i: 0, x: 60

java.lang.ArrayIndexOutOfBoundsException: 5
at LearningJava.main(LearningJava.java:11)

It's suppose to get the length of each array and print all the values in that array and then move to the next one.

I tried adding .length

Java Code: for(int x = 0; x < Grid[i][x].length; x++) mh_sh_highlight_all('java');

but then it doesn't work at all.

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Printing Pattern Using Nested Loop

Jan 19, 2015

I built a java code to print the following pattern using nested loop:

1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 6 5 4 3 2 1
1 2 3 4 5 6 5 4 3 2 1
1 2 3 4 5 4 3 2 1
1 2 3 4 3 2 1
1 2 3 2 1
1 2 1
1

And here is my code

public static void main(String[] args) {
for(int i=1; i<=8;i++)
{
for(int k=1;k<=i;k++)
{
System.out.print(" ");

[Code] .....

which gives the partially true output:

123456781
123456721
123456321
123454321
123454321
123654321
127654321
187654321

I couldn't figure out how to place the spaces.I have made some changes on the code, but it didn't work.

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Using For Loop To Calculate Power?

Oct 16, 2014

I'm new to java and i'm trying to figure out how to calculate power in java using the for loop.

The geometric sequence is (d*c^(n-1)).

So it goes d, d*c^1, d*c^2,......., d*c^(n-1)

??????for (i=1; i<=n; i++){

result

}????????

How to program this. how do i write this using for loop?

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Why Thread Loop Is Not Finishing Without Mentioning Printing

Jan 13, 2015

I was trying to read an article from here : [URL] ..... I was doing the same example but loop is not ending. Thread is struck at CalculateThreadDemo run method. If i mentioned System.out.println then it got terminated else infinite loop continues. I don't understand this.

code:

BlockedThreadDemo
public class BlockedThreadDemo extends Thread {
private boolean isFinished = false;
BlockedThreadDemo(String name) {
super(name);

[Code] ....

Without commenting the statement:

597222
597223
597224
597225
isFinished: true
main thread is dead
597226
CalculateThread is finished.

i: = 49i: = 13i: = 10
BlockedThreadDemo is finished.

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Using While Loop For Printing User Entered Name From Console

Jul 2, 2014

Ask user to enter a name alphabet by alphabet, and print d whole word as output,,,,,, use while loop?Since i am new to JAVA..i have no clue on how to begin?

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