Coin Toss (For Loop) - Reject Negative Numbers

Apr 3, 2014

I'm having some issues getting this code to reject negative numbers. What I'm doing wrong.

import java.util.Random;
import java.util.Scanner;
public class ForLoop
{
public static void main (String [] args) {
Random randomNumber = new Random();

[Code] ....

This is what I have so far..

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Coin Toss Program

Feb 2, 2015

I am trying to create a program that asks you the number of times you want a coin to be tossed, and then outputs the number of times it "landed" on heads in that inputted number of times. I want it to output something like "number of heads:". Instead my program outputs multiple lines saying "number of heads: *a number*" or "number of tails: *a number*".create the output I want by modifying my program?

Java Code:

import java.util.Scanner;
public class Lab04
{
public static void main(String [] args)
{
Scanner in;
in = new Scanner(System.in);

[code]....

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Mar 10, 2015

Create an integer array with 10 numbers, initialize the array to make sure there are both positive and negative integers. Write a program to generate two arrays out of the original array, one array with all positive numbers and another one with all negative numbers. Print out the number of elements and the detailed elements in each array.

public class problem3 {
public static void main(String[]args){
int[] numbers = {1, 2, 3, 4, 5, -1, -2, -3, -4, -5};
for (int i = 0; i<numbers.length;){
if(i>0){
System.out.println(numbers);
}
else
System.out.println(numbers);
}
}
}

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Mar 7, 2014

I need understanding why

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Oct 18, 2014

how to avoid getting negative numbers of coins, use casting and mod to show how many quarters, dimes, nickels, and pennies there are?

import java.util.Scanner;

public class VM
{
public static void main(String[] args)
{
//money deposit
Scanner input = new Scanner(System.in);

[code]....

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Feb 20, 2014

I am very new to Java. I have been working for a couple months on a program for school. It has not gone well. I finally was able to scrap together a working program, but i left something out that needs to be. I have to include input validation to check for negative values, prompting users to re-enter values if negative. I have included my current code, the program works perfectly, but what to do about the negative numbers.

Java Code:

package gradplanner;
import java.util.Scanner;
public class GradPlanner {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int numofclasses = 0;
int totalCUs = 0;

[Code] ....

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Input Validation For Negative Numbers

Feb 20, 2014

I am very new to Java. I have been working on a program. It has not gone well. I finally was able to scrap together a working program, but i left something out that needs to be. I have to include input validation to check for negative values, prompting users to re-enter values if negative.I have included my current code, the program works perfectly, but what to do about the negative numbers.

package gradplanner;
import java.util.Scanner;
public class GradPlanner {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int numofclasses = 0;

[Code] ....

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Code Allows To Enter Negative Numbers -1

Apr 4, 2015

double CashInsert = Double.parseDouble(CashAmounttxt.getText());
System.out.println("Cash Received: " + "£" + CashInsert);
if (CashInsert<=0 &&(CashInsert <TotalPrice)){
ChangeLeft = CashInsert - TotalPrice;
System.out.println("Total: £" + TotalPrice);
System.out.println("Change Due: " + "£" + ChangeLeft);}
else {
System.out.println("Insuffient funds, please enter £"+ TotalPrice +" or More");}
}

#################################################

Cash Received: £-1.0
Total: £4.85
Change Due: £-5.85

It allows me to enter -1 I've already coded it so the person cannot enter less but -1 works.

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Postfix Calculator Doesn't Compute Negative Numbers

Nov 16, 2014

My verify method also always returns false. So I'm given three classes to begin with. Calculator, Expression, and InfixExpression and they are listed below.

The goal is to create a class called PostfixExpression that extends Expression and can read and calculate postfix expressions.

My evaluate() method works for most calculations but when it needs to return a negative value it just returns the positive equivalent.

Also, my verify method always returns false and I can't pinpoint why.

Here's my current code. Some things are commented out for debugging purposes.

import java.util.Scanner;
/**
* Simple calculator that reads infix expressions and evaluates them.
*/
public class Calculator
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);

[Code] .....

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Feb 15, 2014

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] ....

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Adding And Subtracting Positive Or Negative Two Numbers Of Any Length With Strings?

Feb 3, 2014

You are to design a Java application to carry out additions and subtractions for numbers of any length. A number is represented as an object which includes a sign and two strings for the whole and decimal parts of the number. And, the operations must be done by adding or subtracting characters directly. You are not allowed to convert these strings to numbers before the operation.

The program must use a "Number" class which includes at least the following methods:

Number ( );
Number (double n);
Number add (Number RHS);
Number subtract (Number RHS);
String toString ( );

This is what i have but it only adds positive numbers and it doesn't subtract problems like 7.05-8.96. Also some of it was what our teacher gave us like alignwhole method

import java.util.Scanner; 
public class Number{
private String whole;
private String decimal;
private String sign;
  public static void main (String[] args){
 System.out.println("Enter two numbers");

[code]....

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Adding And Subtracting Positive Or Negative Two Numbers Of Any Length With Strings

Feb 5, 2014

You are to design a Java application to carry out additions and subtractions for numbers of any length. A number is represented as an object which includes a sign and two strings for the whole and decimal parts of the number. And, the operations must be done by adding or subtracting characters directly. You are not allowed to convert these strings to numbers before the operation.

The program must use a "Number" class which includes at least the following methods:

Number ( );
Number (double n);
Number add (Number RHS);
Number subtract (Number RHS);
String toString ( );

The below code is what our teacher gave us to start with, but it needs to add and subtract positive or negative numbers of any length. This code only adds positive numbers. Need to write code for subtraction .

Java Code:

import java.util.Scanner;
public class Number{
private String whole;
private String decimal;
private String sign;

[Code] .....

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Nov 17, 2014

So I have re-written the code but it is still not running correctly. Any number i type in it throws an exception, also i need the program to add the totals that i type in and then once i type -1 into the prompt button list all the number i typed in and give me the average.

import java.awt.*;
import java.awt.event.*;
import javax.swing .*;
import javax.swing.text.*;
public class Averages extends JFrame
{
//construct components
JLabel sortPrompt = new JLabel("Sort By:");

[Code] .....

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import java.awt.Color;
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[Code] .....

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I am designing a program in-order convert Binary to Decimal values with added features:

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Here is what i have so far.

public class BinaryToDecimal {
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
String binary;
int decimal=0b10, i, rem;
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[Code] ....

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Jul 5, 2014

Assume that vehicles are going through a two-way traffic intersection. There are three types of vehicles: car, motor bikes and trucks. Generate a series of 10 random integers, between 1 and 3,inclusive.The numbers represent the type of vehicle as stated below:

NumberVehicle Category
1Car
2Motor bikes
3Trucks

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The answer should be something like

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Number of Trucks = Z

but i'm getting

Total number of vehicle:

cars
motorbikes
motorbikes
cars
Trucks
Trucks
motorbikes
motorbikes
Trucks
cars
public static void main(String[] args) {

[code]....

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public class pro {
public static void main(String[] args) {
// TODO Auto-generated method stub 
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public class DoLottery {
public static void main (String args[]) {
int max= 10;
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int random2;
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[code]...

I originally had output at the end but decided to comment it out to see if code would execute if I placed it every time the test was true.

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import java.util.Scanner;
import java.util.ArrayList;
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int x;
char repeat;
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[Code] ......

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for ( int i = 4 ; i <= 8; i++)
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import java.util.Scanner;
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[Code] .....

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The error is "not a statement."

import java.io.*;
import java.util.*;
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[Code] .....

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