Char Program - Output Printed As Blank Space Instead Of 0
Nov 12, 2014
I am aware that the default value of char is 0. But in this program I am getting some unexpected output
public class TestClass12{
static int[] ia = new int[1];
static char ch;
public static void main(String args[]) throws Exception{
System.out.println("ch:"+ch+" ia[ch]:"+ia[ch]);
}
}
Output:
ch: ia[ch]:0
If you see the above output ch is printed as a blank space instead of 0, while the array default value is correctly printed by taking the char default value as index. Why is ch printed as blank space?
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Oct 6, 2014
Write a program to request a student number and their marks in 4 subjects. The program must print the student number, total marks and average mark. All outputs should be printed with suitable labels
This is the error am getting
Scanner get = new Scanner (System.in) - got a red line
int student number, total marks, average mark - got a yellow bulb with a red exclamation mark on it.
I just dont understand where the errors is where what the system dont have ... I am using netbeans ....
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Mar 30, 2014
I want to cut my string from space char but i am getting exception....
Java Code:
import java.util.Scanner;
import java.util.StringTokenizer;
public class NameSurname {
public static void main(String args[]) {
Scanner sc=new Scanner(System.in);
String s0,s1=null,s2 = null,s3=null;
s0=sc.next();
[Code] ....
Console:
Lionel andres messi
Exception in thread "main" java.util.NoSuchElementException
at java.util.StringTokenizer.nextToken(Unknown Source)
at java.util.StringTokenizer.nextToken(Unknown Source)
at com.parikshak.NameSurname.main(NameSurname.java:15) mh_sh_highlight_all('java');
I/p -O/p:
my s0=Lionel andres Messi
And I want to break it as soon as i find space and save it in s1,s2 and s3
s1=Lionel
s2=andres
s3=messi
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Jul 21, 2014
If I code:
int num0=0,num1=1,num999=999;
System.out print(num0+","+num1);
System.out println(","+num999);
I believe I'll get: 0,1,999 but I want 0000,0001,0999 i.e. a width of 4 for small integers.
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Jan 19, 2014
I have the following code....................
double[][] cmMatrix = eval.confusionMatrix();
for(int row_i=0;row_i<cmMatrix.length; row_i++){
for(int col_i=0;col_i<cmMatrix.length;col_i++){
myConsole.getOut().println(cmMatrix[row_i][col_i]);
myConsole.getOut().println("|");
}
myConsole.getOut().println();
}
What do I need so that each row is printed out on a single line ?
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Mar 6, 2014
Why the output is coming out to be blank in the following code.
public class A {
public void call() {
char d = 10 ;
System.out.println(d); // why it is not printing ?
System.out.println((int)d);
}
public static void main(String[] args) {
A a = new A();
a.call();
}
}
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May 4, 2015
In the program below I'm trying to read the contents of several .txt files in the same diretory and create a new .txt file containing all of the data from each file. My output is generated in the console however my .text file is blank.
public static void main(String[] args) throws IOException {
String target_dir = "C:Files";
String output = "C:Filesoutput.txt";
File dir = new File(target_dir);
File[] files = dir.listFiles();
[Code] .....
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Apr 10, 2014
I am trying to write to an output file that the user names. I have flushed and closed the printwriter, so now I am at a loss. The console output works fine with the formatting, and the file is created, but I cannot get the file to populate. I have the following:
public static void main(String[] args) {
try
{
Scanner kb = new Scanner(System.in);
System.out.print("Input file: ");
String inputFileName = kb.next();
System.out.print("Output file: ");
String outputFileName = kb.next();
// Construct the Scanner and PrintWriter objects for reading and writing
File inputFile = new File(inputFileName);
Scanner in = new Scanner(inputFile);
PrintWriter out = new PrintWriter(outputFileName);
[code]....
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Jan 6, 2014
I have written the code:
Java Code:
public static void main(String[]args)
{
Scanner input = new Scanner(System.in);
System.out.print("Type your text: ");
String text = input.nextLine();
int counter = text.length();
if(text.length()> 16)
[Code] ....
And input is: abcdefghijklm
output is:
Java Code:
a b c d
e f g h
i j k l
m x x x mh_sh_highlight_all('java');
So all i want is, if i type: abcdefghijklm
I want this output:
Java Code:
a e i m
b f j x
c g k x
d h l x mh_sh_highlight_all('java');
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Oct 23, 2014
When my app starts up is it possible to create a blank xml file in the c drive? so I can use it later on down the line
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Mar 7, 2015
Java Code:
public synchronized boolean isHit (FilledRect missile) {
for (int col = 0; col < aliens[0].length; col++) {
for (int row = 0; row < aliens.length; row++) {
if (aliens[row][col]!= null && aliens[row][col].overlaps (missile)) {
aliens[row][col] = null;
return true;
}
return false;
}
}
} mh_sh_highlight_all('java');
And I get an error saying that it cannot find symbol method overlaps. So is there something wrong that I am doing?
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Nov 2, 2014
I am writing a program where whatever number I input in my scanner, it will space them...
For example: If I input 456, the output should be 4 5 6... here is my code:
import java.util.Scanner;
public class midterm {
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
String number = "";
[Code] ....
the current output for this program is:
456 456 456
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Oct 20, 2014
I am writing a short quiz program, and when the user inputs their answer they hit the enter key (the are int). But the last question on my quiz is asking the user to they want to repeat the quiz, but when I run the program, it won't allow me to input any information. I can briefly remember my lecturer saying something about entering in a code after each int the user inputs but I can't remember what it was.
Here is a snippet of my code:
//Question 3
do{
System.out.println("Question 3- What Hollywood actor did Mila Kunis have a baby with recently?");
System.out.println( question3 + ".Ashton Kutcher 2.Bradly Cooper 3.Leonardo Dicaperio h.Get a hint");
answer3 = stdIn.nextInt();
if(answer3 != question3)
[Code] ....
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Dec 17, 2014
My program is user input 20 char and the program will print the most common. So I use another int arr which count the number appears in the original array. i know its not so Effective but I don't know why it run but it stop in the middle. I got this code :
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 20
at Ex2.common(Ex2.java:39)
at Ex2.main(Ex2.java:23)
import java.util.Scanner;
class Ex2 {
public static void main(String[] arg) {
Scanner reader = new Scanner (System.in);
char[] arr=new char[20];
System.out.println("Please enter 20 chars:");
for (int i=0;i<20;i++)
[Code] ....
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Jul 20, 2010
i want to create a program in java which counts the number of prints taken from a printer..
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Jun 28, 2014
the number of lines that can be printed on a paper size, the point size of each character in a line, whether lines are double-spaced or single-spaced,the top and the bottom margins of the paper. assume that all characters are of the same point size, and all lines are either single-spaced or double-spaced. note that 1 inch = 72 points. make over, assume that the line are pointed along the width of the paper. for example, if the length of the paper is 11 inches and the width is 8.5 inches,then the maximum length of a line is 8.5 inches.write a program that calculates the number of characters in a line and the number of lines that can be printed on a paper based on following input from the user.
a.the length and width, in inches, of the paper.
b.the top, bottom, left, and right margins.
c.the point size of a line.
d. if the lines are double-spaced, then double the point size of each character
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Feb 15, 2015
I'm not sure why, but my program does not produce an output. It is supposed to output total charges.
/*This program provides the user with the price of their monthly internet service based on two inputs.The program asks users which subscription they have. The options are A, B, or C. This is the first input.
The program then will ask the user how many hours they used the internet for. This is the second input.Then, based on the package number, the program will compute their monthly bill. This is the output.
The program calculates the price based on the following prices:
Package A: For $9.95 per month, 10 hours of access are provided. Additional hours are $2.00 per hour.
Package B: For $13.95 per month, 20 hours of access are provided. Additional hours are $1.00 per hour.
Package C: For $19.95 per month, access is unlimited.*/
import java.util.Scanner;
public class Lab03SV
[code]...
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Jun 24, 2014
I am trying to have a user select from a printed out array list, instead of having the user type in the "bill type" each time there is a bill to avoid user error as much as possible. For example I would like to have it print out like this:
"Select bill type from list:
1. Rent
2. Car
3. etc..."
and I would like the user to choose a number and not type in the "bill type". I don't want to use "Switch case" because it would need to be an expanding and I don't think "switch case" can do that.
Here is the code:
package homebudget;
class Spending
{
//Do i need a totalAmount variable?
String type;
double amount;
int year, month, day;
public Spending()
[Code] ....
case 2:
//Give option to enter a new expense or pick from list.
//How to do this? If Statement that doesn't list duplicates, or a while search?
resp = JOptionPane.showInputDialog("Enter the type of expense:");
type = resp;
resp = JOptionPane.showInputDialog("Enter the amount of the expense:");
amount = Double.parseDouble(resp);
[Code] .....
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May 27, 2014
Sometimes a nullpointerexception is thrown, in some cases null is easily printed as a value of a variable without an exception being thrown.
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Jun 30, 2014
Code in the book is written exactly like this:
import java.util.Scanner;
public class AdditionQuiz {
public static void main (String[] args){
//Generate random two integers using utility System.currentTimeMillis
int n1 = (int)(System.currentTimeMillis() % 10);
int n2 = (int)(System.currentTimeMillis() / 7 % 10);
[Code] ....
however the true/false result can not be printed due to the "answer" variable...
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Mar 19, 2014
My program successfully reads a file, reports back what it finds and creates an output file. However, I cannot get it to write to the output file, it is always blank!
Here's my code:
import java.util.Scanner;
import java.io.*;
public class Ex19
{
public static void main (String [] args)
{
//Variables
[code]....
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Apr 25, 2015
I wrote a program that find adjacent value for -1 .ex:
input
1
3 3
1 2 2
1 1 -1
5 5 0
output
1
code:
/*
* 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.
*/
package javaapplication1;
import java.util.Scanner;
[Code] ....
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Jul 11, 2014
Write a program to create an integer array of size 20. Then, the program should generate and insert random integers between 1 and 5, inclusive into the array. Next, the program should print the array as output.
A tremor is defined as a point of movement to and fro. To simulate it, the program will generate a random number between 0 and 19, which represents the location in the array (i.e. index number). Then, the 3 numbers to the left and right of this location should be reset to the value 0. If there isn't 3 numbers to the left and right you may assume a lesser number depending on the boundaries of the array.
Then, the final array should be printed as output. There is no user input for this program.Your program must include, at least, the following methods:
-insertNumbers, which will take as input one integer array and store the random numbers in it.
-createTremor, which will generate the random number as the location and return it.
A sample run of the program is shown below:
Sample output #1:
Array:1 2 2 3 1 5 4 2 3 4 4 2 1 1 3 2 1 4 3 2 1
Random position: 5
Final Array:1 2 0 0 0 5 0 0 0 4 4 2 1 1 3 2 1 4 3 2 1
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May 28, 2014
So I'm pretty much done with this project except I am unable to get the println statements of "Produced" & "Consumed" to display in my JTextArea on my GUI. I am completely lost as to exactly why the program just continues to create new windows repeatedly crashing. I will include the code to the 3 classes I'm working with - I'm capturing with the fac.println("") on both consumer and producer and have a method in the Factory class that tells it to print in JTTextArea
import java.util.Date;
public class Producer implements Runnable
{
private Buffer<Date> buffer;
private Factory fac = new Factory();
public Producer(Buffer<Date> buffer)
[Code] ....
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Sep 21, 2014
I'm trying to copy my program output to a text file and still have it be displayed in the console.
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Oct 1, 2014
It has no errors in it, but when it runs, it just doesn't show any output at all. Here's my code.
Fuel Class:
public class FuelGauge {
// Setting the gallons and the total amount of gallons
private int gallons;
final static int TotalGallons=15;
public FuelGauge(){
gallons=0;
}
// Initiate the number of gallons
public FuelGauge(int gallons){
[Code] .....
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