Append Letters In Variable - While Loop

Jan 22, 2015

I am trying to create program that will append letters in "sb" variable using StringBuilder until num "0" isn't entered

But something is strange. Every letter I need to enter twice. Tried with "while" and "do while" loop, but same result.

package v0502;
 import java.util.Scanner;
 public class stringMain {
  public static void main(String[] args) {
StringBuilder sb = new StringBuilder();
 
[Code] ....

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Write A String Name Variable To Store Letters / Dotes And Spaces Only In Java?

Apr 5, 2014

I am trying to write a program and the name variable can only store letters,dotes and spaces. But whenever I enter a space, the program doesn't work. Following is my code.

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

[Code] ....

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While Loop Inside A For Loop To Determine Proper Length Of Variable

Feb 25, 2014

Here's the code: it's while loop inside a for loop to determine the proper length of a variable:

for (int i = 0; i < num; i++) {
horse[i]=new thoroughbred();
boolean propernamelength = false;
while (propernamelength==false){
String name = entry.getUserInput("Enter the name of horse "

[code]....

I was just wondering what was going on here -- I've initialized the variable, so why do I get this message? (actually the carat was under the variable name inside the parentheses.

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Mar 21, 2015

Write a GUI program to convert all lowercase letters in a string to uppercase letters, and vice versa.

For example, Alb34eRt will be converted to aLB34ErT.

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Jan 7, 2015

The concept is simple. I wish to know how I could replicate a variable using a for loop which will have a new number assigned. Essentially, as the loop progresses it would create a copy of the same variable with a number at the end. Once

Something like this, variable1, variable2, variable3, variabl4, variable5

Once I have my five variable I will then be able to print them out

import java.util.Scanner;
public class replicating_variable {
public static void main(String[] args) {
String variable1;
Scanner input = new Scanner(System.in);
for(int i = 0; i < 5; i++){

[Code]...

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Print Variable Which Only Exists Within For Loop?

Jul 18, 2014

There's loads of problems with this. What I'm trying to do.

1) get a program to add the contents of an array together, preferably with a for loop and not the heavy handed version I've tried to use here.

2) get the for loop's output just once, since it won't compile or recognise the variable outside of the loop. How do I make the loop's 'counter' variable available everywhere?

public class retint {
 public static void main(String[] args){
int[] onetoTen = {1,2,3,4,5,6,7,8,9,10};
for (int i=0; i<10; i++) {
int counter = (onetoTen[0] + onetoTen[1] + onetoTen[2] + onetoTen[3] + onetoTen[4] + onetoTen[5] +
onetoTen[6] + onetoTen[7] + onetoTen[8] + onetoTen[9]);
 System.out.println(counter); 
}
}

Terrible code, I know. There has to be a more efficient way.

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May 28, 2014

I am trying to increment a variable named counterVariable each time it goes through a for enhanced loop. It is stuck on 0.

Java Code:

valuesProcessor:
for(String[] row : values) {
for(String col : row) {
int counterVariable = 0;
if(col == null)
break valuesProcessor;

[Code] .....

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Mar 29, 2014

I have a csv file and I want to insert the csv file into the database columns consist of date, description1, description2, amount1, amount2, narration.. but the problem is the narration is coming in second line in csv file due to which the data is not getting inserted into the database. So how to append the narration into the first line,I have enclosed the demo format of csv file and a code to read the csv file..

myFile.csv file:

20-5-2013,"Cash Rec. From abc","pymt",-500.00,,
"Cash rec. from abc office",

20-5-2013,"Cash Rec. From xyz","rcpt",-5100.00,,
"Cash rec. from xyz office",

[Code] .....

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How To Append Data In Excel

Oct 5, 2014

How to append the data in excel .. Checking the file if its known or unknown then save it to excel file like example

when i first run the program 3 files there in excel

when i run for the second time same it will be 6 files there in java

Here is the code

public String QueryACL(String myFilePaths) {
try {
SHAOneReported = new PrintWriter(new FileOutputStream(TodayDate.format(date) + "-SHA1SummaryReport.xls", true));
} catch (FileNotFoundException exc) {
JOptionPane.showMessageDialog(null, "File not Found.");

[Code] ....

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Mar 11, 2015

This is my class code below and the Junit test that is being run.

My problem is that when I try to make an append to my list I have to return the actual list but I cant figure out where I am going wrong.

Java Code:

package structures;
import java.util.Iterator;
import java.util.NoSuchElementException;
public class ListImplementation<T> implements ListInterface<T> {
private Node<T> listHead, listTail;
private int size;

[Code] .....

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Apr 26, 2013

I have the folowing method i what to return two values

        public   String[]    getChildRoles()              
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        }

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Feb 17, 2014

I have the following code which always gives me java heap space error because of line number 65 due to string buffer append method in this line, I don't know why?

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
import samy.*;
import java.util.Scanner;
public class InfixToPostfix {
OrderedList list = new OrderedList();
Scanner input = new Scanner(System.in);
public StringBuffer postfix = new StringBuffer();

[Code] .....

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Mar 24, 2014

I am trying to run the following code but getting the error above.
 
import java.io.*;
public class StringBuilder {
    public StringBuilder() {
        super();
    }   
    public static void main(String args[]) {
            // creates empty builder, capacity 16
            StringBuilder sb = new StringBuilder();
            // adds 9 character string at beginning
            sb.append("Greetings");
    }
}

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Jan 11, 2015

How to output text to a file, so I had to do my own research on google, but the results I found were confusing. I finally got my code to write to a file, but I cannot figure out how to append a new line. I know what part of the code is incorrect, but I don't know how to fix it. here is what I have right now:

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Scanner;
 public class highscore {
public static void main(String[] args) throws IOException {

[Code] ....

I can see the last two lines are telling the program to overwrite the first input with the second. Of course if I pick a different file name for the second output, I get another file with the second input, but I need to learn how to append as well.

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Class 1 open main frame

Class2 add panel for main frame

Class3 append text to Jtextarea (of panel class2)

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Jun 7, 2014

I am having a bit of difficulty understanding/Using FileWriter. Now by my understanding in the API FileWriter allows to use write at the end of your file, if you have text in there already, correct?

I have a file with people info in it. And I created a GUI which allows people to input that data.

Java Code:

File file = new File("People.txt");
FileWriter fw = new FileWriter(file);
People p = new People(firstName, lastName, email, sex));
fw.append(p);
fw.close() mh_sh_highlight_all('java');

Now, I keep getting an error on the fw.append(p)

Java Code:

The method append(CharSequence) in the type Writer is not applicable for the arguments(People) mh_sh_highlight_all('java');

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I know how to append text to a File using the true argument but I would like to be able to append to a certain line In the file.Basically I've made a simple html page with Image links to different sites. I'm trying to make an app that will take a new site as Input and append It to the html file before the </body> tags.

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I'm using one method to take input from the user and append some text to it, then I am trying to return the value of the variable and use another method to print it out. But for some reason whenever I try doing this I can't print out anything and I only get a "null" output. Why this is happening?

package Homework3;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Homework3 {

[Code] .....

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Given the case I have an object which is assigned only once. What is the difference in doing:

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private MyClass(){}
//...
}

and

public class MyClass {
private MyObj obj;
private MyClass(){
obj = new MyObj("Hello world");
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//...
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Is there a difference in performance or usability? (Given also the case there are no static calls expected) ....

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Oct 27, 2014

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I read in a discussion forum that when local variables are declared (example code below), their name reservation takes place in memory but they are not automatically initialized to anything. On the other hand, when member variables are declared, they are automatically initialized to null by default.

Java Code: public void myFunction () {
int [] myInt; // A local, member variable (because "static" keyword is not there) declared
} mh_sh_highlight_all('java');

So it seems that they are comparing local variables and member variables. While I think a member variable can also be be local in a block of code, isn't it?

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Oct 15, 2014

I can't figure out why my code doesn't work. My task is to replace for example ä=>ae, using this method String.charAt(int index). So here is my code:

public class pich {
public static void main(String[] args) {
String text = "Die süße Hündin Leica läuft in die Höhle des fülligen Bären "+
"Iliyan (ein Übergrößenträger), der sie zum Teekränzchen eingeladen hat."+
" An ihrem Öhrchen trägt sie modisch eine Ähre.";
String textOhneUmlaute = "";

[Code] ....

when I launch my code I get the same String and nothing has changed

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I am trying to reverse a string. Here is my code:

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

[Code] .....

PROGRAM OUTPUT:
Enter string
me
e

The program returns e instead of em

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Jan 22, 2014

How to write a code that allows the computer to read a number from the keyboard, from 0-26 and print out that much of the alphabet

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input = 7 output = ABCDEFG
input = 0 output =

I tried this but it only gives me one letter that corresponds to the number

package pkg2911homework.pkg1;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner keys = new Scanner(System.in);

[Code] ....

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