Addition Operation On Character Variables

Feb 8, 2015

When addition operation is performed on the character variables ,then it specifies actually that the ASCII values are added because the character variable stores ASCII value of the character constant ,then why after the addition the result cannot be stored inside a character variable ,why it needs to be stored in an integer variable only ,when actually the character variable stores the ASCII value then why is it an error to store the added result in an character variable.

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i want to have a JLabel that could "robotically" type words character by character.

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Code:

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Expected Output:
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Actual Output:
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}
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temp.append(xorVal);
}
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but I am not getting actual XOR value of two charcters that I am trying to get.

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ab
abc
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public static void main(String arg[])
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System.out.println(ch);
}
}

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Dec 19, 2014

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Java Code:

class Matrixadd {
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int x[][]={
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{4,5,6},
{7,8,9},

[Code] .....

I am getting a 'Not a statement' error at line 36.

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My code and compile time errors:

C:UsersReignDesktopHTMLBank.java:89: cannot find symbol
symbol : variable Amount
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[Code].....

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import java.util.*;
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int usernumber;

[code]....

I'm supposed to use a for loop that runs until it reaches the number input by the user, but I'm not sure how to tell the program to add the user's number along with all of the even numbers in between the user input and 2.

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Dec 2, 2014

I am trying to learn how to use file input/output in addition to exception handling... The problem is my textbook wrote this chapter for a version of Java that hasn't come out yet, so everything I do "according to the textbook" doesn't work. any feedback on correcting these exception errors because I am not sure what is causing them or how to fix them.

I was able to have it display the name of the book in the Book.txt file, but when I added the second part if the file doesn't exist, that's when the errors came up and it wouldn't compile.

import java.io.*;
import java.util.*;
public class DisplayBook
{
public static void main(String[] args) {
try {
File book = new File("Book.txt");
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[Code]...

These are the compilation error messages I am receiving: (I have managed to get it down from 7 errors to just 4, but now I'm stuck)

DisplayBook.java:15: error: unreported exception IOException; must be caught or declared to be thrown
while ((letter = in.read()) != -1) //if file exists, displays book title
^
DisplayBook.java:24: error: unreported exception FileNotFoundException; must be caught or declared to be thrown

[Code] ....

4 errors

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May 6, 2014

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2. print how many characters are in the string

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So far:

public static void main( String[] args ) {
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for (int i=0; i<besedilo.length();i++)

[code]...

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Given a string of numbers and operator. Compute as follows:

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I don't know why I get the sum of 52 when I use a for loop.

Here are my codes:

public class string2math {
public static void main(String[] args) {
String input = "000293000002030403+0400293059694";
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String firstOpera = operand[0];

[Code] ...

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I have most of the code done as you can see below:

* Queue Interface: Queue.java
* Queue Implementation: ArrayQueue.java
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Right now, I am stuck on the first calculation which is trying to figure out the average size of the landing queue. For some reason, as you can see at the bottom of my demo program, the average always comes out to be 0.0 and I'm not sure what's wrong.

Secondly, how to calculate the average time a plane stays inside a queue for. Write a program to simulate this airport's operation. You might assume a simulated clock that advances in one-minute intervals. For each minute, generate two random numbers: If the first in less than LandingTime /60, a "landing arrival" has occurred and is added to the landing queue, and if the second is less than TakeOffTime /60, a "takeoff arrival" has occurred and is added to the takeoff queue.

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* Queue Interface: Queue.java
* Queue Implementation: ArrayQueue.java
* Demo Program: Airport.java

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Secondly, how to calculate the average time a plane stays inside a queue for.

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Feb 2, 2014

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public static int Converter(int input, int weight) {
System.out.printf("Input is now %d, weight is now %d
",input,weight);
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[Code] .....

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I can solve the problem by creating a variable sum,and passing along, but i am just curious why the final return 0 is giving me not a +0, but a concatenate 0.

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Java Code:

import java.awt.List;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Scanner;
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[Code] ....

I tried something like that:

for(int i=0; i<rows; i++) {
for(int j=0; j<cols; j++){
matrix [i][j]=textFile.get(i).split(" ");
//System.out.println(matrix[i][j]);
}
}
*/ mh_sh_highlight_all('java');

File col.txt is like this:

Java Code:
5 9 7 1 5
3 6 8 6 8
4 6 7 8 9
9 8 3 5 7 mh_sh_highlight_all('java');

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package database_console;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
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[code]....

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public static void main(String[] args){
Scanner in = new Scanner(System.in);
int ent1 = 0;

[Code]....

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