Mathematical Operation On Bytes
Jan 28, 2015byte a1 = 0;
byte a2 = 4
byte a3 = 4;
//below statement gives a compilation error
a1 = a2 + a3;
//below line compiles fine.
a1 = 4 + 4;
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Live Bytes For Object Instance In JVisualVM Increase On Every Operation
May 5, 2014Whenever i perform any operation in my application Live Bytes of a particular Instance of a class increases by 1000.Although i perform the same operation everytime it always increases by 100 or 1000.Is this a memory leak or does these instances increase everytime we perform an operation.
View Replies View RelatedAdding Two Bytes In Binary
Oct 2, 2014I am trying to add two bytes together in binary. The problem is that I need to print the carryover also. The printed result should be 8-bits long if the byte or the integer converted in binary is less than 8-bits the empty space should be filled with 0-s. I figured out how to print and add them, the part with the filling the blank with 0-s too. how to print the carryover. For example:
byte x =15;
byte y =9;
the output will be :
00011110 - carryover
x 00001111
y + 00001001
__________________
00011000 - result
import java.util.Scanner;
public class Addbytes
{
public static void main(String args [])
[code]....
Convert String To Array Or Bytes
Feb 9, 2015First project here and it has been a steep learning curve. I have some code in the TwoWaySerialComm class that will write to a Com port. In my other class EBIAlarm i have my GUI. The aim of my app is the send strings out of the Com port by pressing Jbutton1-3 I can open the Com port but I don't know how to send the string.
Convert String to Array of Bytes.
import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
[Code].....
Decryption - Data Must Not Be Longer Than 128 Bytes
Oct 21, 2014Button Code:
private void DecryptBActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
final String plainText;
if (!areKeysPresent()) {
// Method generates a pair of keys using the RSA algorithm and stores it
// in their respective files
generateKey();
[Code] ....
Everytime throwing exception "javax.crypto.IllegalBlockSizeException: Data must not be longer than 128 bytes" in decrypt method.
File Handling - It Store Character Not Bytes
Apr 13, 2015Now I have a problem for file handling it is not store bytes in to rahul.txt. it stores character not bytes.
package com.fileh;
import java .io.*;
//import java.io.File;
public class Writedata {
public static void main(String args[])
{
try{
FileOutputStream fout= new FileOutputStream("rahul.txt");
String s="my name is rahul";
byte[] b =s.getBytes();
fout.write(b);
fout.close();
}
catch(IOException ioe)
{
}
}
}
Converting Strings To Bits / Bytes And Vice Versa
Feb 23, 2014I have:
Java Code: String s = "111100100111011011000010110011101"; mh_sh_highlight_all('java');
I am trying to convert that to bits/bytes.
I need to make that into a series of bits with the same exact values..."1" = a 1 bit, and "0" = a 0 bit.
Remarkably, I haven't been able to find much on this sort of conversion - possibly I am just not searching with the right keywords? As typically, stackexchange or other parts of the web have the same question that I have, asked (and answered) by many others.
How do I go about doing this?
Furthermore, how would I go about saving this to a file - and are there already good "kinds" of files to save this into. If not, how do I go about making my "own" type of "file."
CONTEXT:
I've written a compression system. To keep things simple, I've been using a string to hold the 1s and 0s, so that debugging is simpler, and overall, everything is easier to write. Now, however, my algorithm is finished - and I'm moving on to create a GUI and a working system. This is the last step that I need for the non-GUI stuff (which I'm writing through javafx by the way - is this the right thing to use? I've been told that that is where people are moving towards. Away from swing).
How To Create A Mathematical Sequence
Sep 17, 2014I want to declare integers, while the program is running.
I run the program and then I give it via System.in.println an integer and repeat this as long as I want. I want the program to give those integers a name of a certain type for, for example a(i) or a[i], dunno, (it should be handy) and then a(i) represents the the i'th integer I gave the program. My idea is then that I can use those elements by their name just like, if I had declared them in the first place. For example add two integers together. For example I defined a method add+, which waits for 2 integer and then adds them. For example I write:
add
a(2)
a(47)
(then I would get here the result.)
However I don't know, how to let the program count the number of inputs or how to let it declare and use variables.
Using BigDecimal For Mathematical Formulas
Apr 20, 2014How to convert the equation below for bigDecimal objects. I have already tried this, and this and the output is really weird once I call the method. The first block of code is what I'm trying to convert into BigDecimal arithmetic.
public static double calculateFutureValue(double monthlyInvestment,
double monthlyInterestRate, int months) {
double futureValue = 0;
for (int i = 1; i <= months; i++) {
[Code] ....
My attempt at this is as follows:
public static BigDecimal calculateFutureValue(double monthlyInvestment,
double monthlyInterestRate, int months) {
BigDecimal futureValue = new BigDecimal(0.0);
BigDecimal montlyInvestmentDecimal = new BigDecimal(monthlyInvestment);
[Code] ....
Output:
Welcome to the Future Value Calculator
DATA ENTRY
Enter monthly investment: 1
Enter yearly interest rate: .01
Enter number of years: 3
Month: 1 FutureValue: 0E-66
Month: 2 FutureValue: 0E-132
Month: 3 FutureValue: 0E-198
Month: 4 FutureValue: 0E-264
Month: 5 FutureValue: 0E-330
[Code] ....
FORMATTED RESULTS
Monthly investment: $1.00
Yearly interest rate: 0.0%
Number of years: 3
Future value: 0E-2376
Continue? (y/n):
So clearly this still isn't working.
How To Create Mathematical Sequence
Sep 17, 2014I want to declare integers, while the program is running.
I run the program and then I give it via System.in.println an integer and repeat this as long as I want. I want the program to give those integers a name of a certain type for, for example a(i) or a[i], dunno, (it should be handy) and then a(i) represents the the i'th integer I gave the program. My idea is then that I can use those elements by their name just like, if I had declared them in the first place. For example add two integers together. For example I defined a method add+, which waits for 2 integer and then adds them. For example I write:
add
a(2)
a(47)
(then I would get here the result.)
I don't think implementing the add function is difficult. However I don't know, how to let the program count the number of inputs or how to let it declare and use variables.
Mixed Mathematical Expression Error
May 28, 2014I understand how mixing expressions of different data types can result in an error if the assigned variable is not the same data type. But I don't understand how the below causes an error:
short totalPay, basePay = 500, bonus = 1000;
totalPay = basePay + bonus; // This causes the error
500 + 1000 = 1500. 1500 falls within the short parameters. If basePay, bonus, and totalPay are all short, as well as the resulting equation, how is this erroring?
Completing Mathematical Equation In JavaScript
Jan 29, 2015This first part of code is my HTML
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<meta charset="UTF-8">
<link href="jquery/jquery.mobile-1.4.5.min.css" rel="stylesheet" type="text/css"/>
<meta name="viewport" content="width=device-width, initial-scale=1">
[Code] .....
Create Mathematical Vector Of D Dimension Initialized At 0
Nov 14, 2014class GVector {
// TODO: declare a private array to save the vector coordinates
// Creates a mathematical vector of d dimensions, initialized at 0
public GVector(int d) {
// TODO: implementation
[Code] ....
I'm confused with what type of array I need to use to save the vector coordinates and what to put in Gvector. Is it a constructor?
Mathematical Parser Only Returns Size2 And Not Size In Android App
Feb 1, 2014Using exp4j which is a mathematical parser twice in one routine (or separated) in Eclipse and only the size2 is calculated when app is run in eclipse.
private void calculate size(){
String s1 = size.getText().toString();
String s2 = size2.getText().toString();
try {
Calculable result= new ExpressionBuilder(s1).build();
size1.setText(Double.toString(result.calculate())) ;
[Code] .....
Simple Mathematical Computation Not Working - Receiving Errors
May 3, 2015Here's my code:
System.out.println((3 / 1.5) + 42(3 + 3));
I don't understand what I'm doing wrong. I'm receiving these errors:
PrintFunction.java:8: error: ')' expected
System.out.println((3 / 1.5) + 42(3 + 3));
^
PrintFunction.java:8: error: not a statement
System.out.println((3 / 1.5) + 42(3 + 3));
^
PrintFunction.java:8: error: ';' expected
System.out.println((3 / 1.5) + 42(3 + 3));
I'm using Sublime Text and JDK 8.
Perform Mathematical Calculation Between Two Numbers Entered By User
Feb 16, 2015I need to write a Java program to perform a mathematical calculation between two numbers entered by the user. User has to choose the mathematical operation and input it and then when the user enters 2 numbers, he gets the answer. When user enters any other character other than *, /, + and - he should be able to exit. Perform calculation between numbers should be until user decided to exit from the program. My code is below, calculation part goes well, but can't get it exit when user enter any other character.. How to fix it?
import java.io.*;
public class q11
{
public static void main(String[]args)throws IOException
{
InputStreamReader ISR=new InputStreamReader(System.in);
BufferedReader BR=new BufferedReader(ISR);
while(true){
System.out.println("Enter..");
System.out.println("* : For multiplication");
[Code]...
Java Program That Prints Out Taylor Series For Mathematical Constant E
May 10, 2015I am trying to write a java program that prints out the number that is the mathematical constant e. As you input a number, the larger it gets , the closer it comes to 2.71828 . Here is my code:
//taylor series that prints out e^1=1+1/1!+1/2!+1/3!+.....
import java.util.Scanner;
public class taylor_1
{
public static void main(String args[]) {
Scanner input=new Scanner(System.in);
int factorial =1;
[Code] .....
Here is the output of my code:
enter n
9
Taylor series is 9.0
Conversion Between Primitive Data Types - Mixed Mathematical Expressions
Aug 6, 2014How I'm supposed to write out the statement.
I am fairly certain that I should be making variable "b" and "c" a float. But beyond that I'm confused.
uploadfromtaptalk1407333378833.jpg
Operation With Strings
May 6, 2014I have to write a java programm,where i have given string. Output should be like that:
1. print only once what characters are apearinng in string, and the last index of it
2. print how many characters are in the string
I have to do it only with loops,no special classes
So far:
public static void main( String[] args ) {
String besedilo = "Testiranje";
besedilo = besedilo.toLowerCase();
for (int i=0; i<besedilo.length();i++)
[code]...
String To Math Operation
Sep 14, 2014Given a string of numbers and operator. Compute as follows:
Consider, "000293000002030403+0400293059694" is the input.
a. Separate the two operands and one operator:
"000293000002030403" "+" "0400293059694"
b. On each string operand, take each digit. ADD them all.
(2+9+3+2+3+4+3) + (4+2+9+3+5+9+6+9+4)
The two string operands should now become two integers.
c. Lastly, perform the operation using the string operator specified on the original string.
26 + 51 = 77
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";
String [] operand = input.split("+");
String firstOpera = operand[0];
[Code] ...
Addition Operation On Character Variables
Feb 8, 2015When 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.
View Replies View RelatedSwing/AWT/SWT :: JDialog Close Operation
Mar 4, 2011how the entire application could be close when you click on X in a JDialog Box. I have tried
System.Exit (0)
but it only close the Dialog box
Using Queues To Simulate Airport Operation
Nov 13, 2014*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*.
*Next, check whether the runway is free. If it is, first check whether the landing queue is nonempty, and if so, allow the first plane to land; otherwise, consider the takeoff queue. Have the program calculate the average queue length and the average time that an airplane spends in a queue.*
I have most of the code done as you can see below:
* Queue Interface: Queue.java
* Queue Implementation: ArrayQueue.java
* Demo Program: Airport.java
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.
Next, check whether the runway is free. If it is, first check whether the landing queue is nonempty, and if so, allow the first plane to land; otherwise, consider the takeoff queue. Have the program calculate the average queue length and the average time that an airplane spends in a queue.
I have most of the code done as you can see below:
* Queue Interface: Queue.java
* Queue Implementation: ArrayQueue.java
* Demo Program: Airport.java
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.
Recursion - If Else Loop To Check If Operation Is Completed
Feb 2, 2014I am currently learning recursion, and i have a query. I have a program that receives user input, and outputs the decimal input into binary form. In my recursive function, I have a if else loop to check if operation is completed.
public static int Converter(int input, int weight) {
System.out.printf("Input is now %d, weight is now %d
",input,weight);
if(input==0) {
return 0;
[Code] .....
The final return, when input finally hits zero is concatenating 0 to whatever i have this far. e.g. Decimal 10 should give 1010, but because of the "return 0", instead of getting 1010+0, i am getting 10100.
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.
How To Perform Row Operation - Store Data Into 2D Matrix
Sep 18, 2014I am able to perform column operation but not able to perform row operation because i am not able to store data say a 2 matrix [][]. I need to store the data into a 2-D matrix. Here is my code:
Java Code:
import java.awt.List;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Scanner;
public class colRowRead {
[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');
Program To Simulate Operation Of Simple Robot
Apr 26, 2015Write a program to simulate the operation of a simple robot. The robot moves in four directions: Forward, backwawrd, left, and right. The job of the robot is to move items and place it in the right slots in each station. There are 8 stations plus the pickup station. Pick up station is the initial start where the robot picks the items. 8 items can be placed on each station. The nearest station must be filled before placing items on the next station. The items are marked with identification or serial numbers. The items with odd serial number go to the right and items with even number go to the eft. The last slot, number 7 is reserved for light items which are less than 80kg. The serial number is a five digit number, the MSB digit 5 indicates that the product must be placed in the fifth station which is keeping the product at 20 degree F.
View Replies View Related