Pass By Value And Strings

Jul 19, 2014

Below is the snippet of code

public static void main(String[] args) throws Exception {
String s = "oldString";
reverse(s);
System.out.println(s); // oldString
}
public static void modifyString(String s) {
s = "newString";
System.out.println(s); // newString
}

I thought the first print statement would print "newString" as String is an object, and when we pass objects between methods, changing state of the object in any method reflects across the methods.

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How To Find Whether Strings Contained In Array Of Strings Constitute A Similar Character Or Not

Aug 25, 2014

I am having an array of strings and i want to find out whether these strings contained in the array contain a similar character or not.For example i am having following strings in the array of string:

aadafbd
dsfgdfbvc
sdfgyub
fhjgbjhjd

my program should provide following result: 3 because i have 3 characters which are similar in all the strings of the array(f,b,d).

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Sorting Lowercase Strings Before Uppercase Strings

Mar 26, 2014

I can sort strings in a collection by uppercase and then lowercase though I was wondering if there is any way of doing it in reverse, sorting by lowercase then by uppercase.

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Cannot Pass By Reference?

Aug 25, 2014

I'm fairly new to Java, I'm very experienced with C++ and C# in which you can pass by reference - extremely useful. Take for example this bit of code in C#:

class MyClass
{
public MyClass(int i)
{
m_i = i;
}
  public int m_i;

[Code] ...

Just at the end of this program x.m_i will be equal to 8. As far as I can see this is not possible in Java: you can't pass a double by reference, using a Double will kick in the autoboxing so that won't work either. The only "solution" in Java would be to pass in a double[] (of length 1) or to make a wrapper class, both nasty solutions because a user may want to just hold a double as a member of their class just as I have, for reasons such as not allocating more memory for a class and generally not being bloated.

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JSP :: How To Pass Scriptlet Value Into JS Function

Apr 10, 2007

E.g:
onblurr="check(this, '<%=company.getId()%>' );return false;"
doing this, function check(field, inputVal) {
alert("companyId:" + inputVal);
}

Gave me the alerted value as :
companyId:<%=company.getId()%>
instead, if the company.getId() --> 30

When I do like this, how to get the value 30 inside the function? i want companyId:30

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JSP :: Pass Column Name As Parameter?

Mar 23, 2014

Is it possible to pass column name as a parameter using servlets?

I tried using the following code but it doesnt work

String date=request.getParameter("date");
String sql="alter table cs1_cn add " +date+ " boolean";
PreparedStatement ps=conn.prepareStatement(sql);

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JSF :: How To Pass Value To Bean Class

Nov 7, 2014

Getting JS -> JSF value to Bean class? I have tried with below code:

JSF code:

<h:commandButton styleClass="buttonpos" value="Get Value" action="#{myBean.action}" onclick="document.getElementById('crForm:hiddenInput').value">
<h:inputHidden id="hiddenInput" value="#{myBean.action}"/>
</h:commandButton>
Java Beans
public class CurrencyExchangeBean {
protected static Logger logger = ILogger.getLogger(CurrencyExchangeBean.class);

[Code] .....

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How To Pass Array To Method

Aug 3, 2014

So if I assigned values in arrays like the below:

This is the method in main class:

public static void trainer(){
trainer[] trainerArr = new trainer[4];
trainerArr[0] = new trainer("Ben Yap", "Male", "Kuala Lumpur", 10000, "Yoga");
trainerArr[1] = new trainer("Wilson Ting", "Male", "Kuala Lumpur", 10001, "Kick-boxing");

[Code] .....

How can i pass these arrays into another method in the main class?

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Pass Data To Browser

Mar 19, 2014

i'm able to login and download pages of a website using httpclient library.but i cannot launch a page on browser after login successful!becouse the browser not remember the username and password of the session so the site show that i'm not logged!

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EJB / EE :: How To Pass XML File As Message In JMS

Apr 22, 2014

I am new to the JMS technology. I have written one sample sender and receiver program to pass a string message to the JMS queue and retrieve it back. It is working fine as well. But now, I want to pass a xml file to the JMS queue. Then from there I need to read the XML file and convert it into a Java object Using Jaxb. I know how to convert an XML into java object using Jaxb. But i am unable to send the XML file as a jms message to the listener.

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Pass A Variable From One Class To Another

Jan 5, 2014

As the title says, how can I pass a value from one variable to another class?

Example:

So here I'm switching one frame to another, called "redigeraProjekt". Now in this class, I want the value from .getSelectedIndex() pass over to that class. I've tried to use the variable "valIListan" but it cannot find it. Probably because it's "private" (?)

valIListan = listaAllaSpelProjekt.getSelectedIndex();
redigeraProjekt npj = new redigeraProjekt(); // "switching" to another frame
npj.setVisible(true);
this.setVisible(false);

I hope you understand what I'm saying

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Can Pass In Return Value In Parameter?

Jun 25, 2014

Can I pass in a return value in a parameter? I'm trying to do something like this:

Object o = new Object(anotherObject.method());

Where method returns an int. But when I try doing this it calls that method, rather than passing in the return value..

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How To Pass Values To A New Frame

Nov 28, 2014

I'm new to Java and I'm trying to pass several values from one frame to another. I've searched around and most codes I've come across are from auto generated GUI code. This what I've been trying to do

Frame1

private class SubmitButtonListener implements ActionListener {
public void actionPerformed (ActionEvent e) {
Frame2 f2 = new Frame2();
//call setValue from Frame2
f2.setValue(4.0);
f2.setVisible(true);
}
}

Frame2

private double val;
public double getvalue()
{
return val;
}
public void setValue(double v)

[code]...

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How To Pass Filename Into Constructor

Feb 26, 2015

I'm taking inheritance now and some things look confusing. I'm trying to do the following but the code, in particular, the constructor in subclasses are pointed to be wrong. The constructor in LongestWord is not correct,how to pass the filename into the constructor?

Java Code:

import java.util.Scanner;
import java.io.File;
public abstract class FileProcessor {
protected Scanner input;
public FileProcessor(String filename) throws Exception

[Code] ....

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JSP / JSTL :: Pass Value And Validate

Feb 15, 2013

Why will this NOT validate correctly in my IF Statement? Basically, a user chooses an option from the drop down list. The value is passed to t.jsp (itself) and if the option "All" is chosen, then it does something. If any of the years are chosen, then it does something else.

t.jsp (simplified version of what I want)

<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<html>
<form method="get" action="t.jsp">
Select Year:

[Code] ....

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JSF :: How To Pass A Value Inside Rich Element

Mar 3, 2014

using richface 4.
#{rich:element('detailsTable'#{id.No})})

showing syntax error.How to pass the value #{id.No} inside rich:element

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Feb 6, 2015

How do I pass the data within an initialized array from inside one method to another method of the same class? Will I need to return the array, assigning it to a temp array, which will then be passed as an argument to the other array? The idea is to create an array for an entire year, and be able to manipulate or edit data for a particular month using the other method.

public class Temperature {
static Scanner input = new Scanner(System.in);
static String [] monthArray = {"January", "February", "March", "April", "May",
"June", "July", "August", "October", "November", "December"};
public static void main(String[] args) {

[Code] .....

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Mar 7, 2015

I have a variable <c:set var="var1" value = "myvalue" /> , I want to pass var1 as <%= new customclass().method1(var1) %>.what is the syntax to pass this value.

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Magic Square Won't Pass The Tests

Feb 11, 2015

public class MagicSquare {
public boolean isSquare(int[][] arr) {
if(arr.length == arr[0].length)
return true;
else
return false;

[Code] ....

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Swing/AWT/SWT :: How To Pass Value And Add Item Into Combobox

Nov 15, 2014

createConnection();
try{
String str = "select * from stocks";
stmt = conn.prepareStatement(str);
ResultSet rs = stmt.executeQuery();

[Code] .....

I have this code in my another package , i want to call it in other package , but i dunno how to do that.

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How To Pass Array From Servlet To JSP And Print

Dec 12, 2014

I'm trying to pass an integer array,

int[] fibSequence;

From my Fibonacci servlet to a jsp page called "result" but when I pass the array in the redirect I get the following output:

[[I@63cf2179]

I figured out that this is because the array is being converted to string before it is passed over and then converted again on the jsp page.

How I can pass the array over and print the contents, ie an array of integers?

This is how I'm sending the array in the result page:

resp.sendRedirect(("result.jsp?fibSequence=" + fibSequence));

And this is how its being retrieved and printed on the result.jsp page:

<%String[] fibSequence = request.getParameterValues("fibSequence");%>
<input type="text" name="fibNum" value="<%=java.util.Arrays.deepToString(fibSequence)%>" size="40px" style="font-size:30pt;height:60px">

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How To Write A Constructor Where Can Pass 1 Or 2 Arguments

Apr 6, 2014

I am looking to write a constructor (in a herited class) to initialize the name of a single piece and its orientation using values ​​passed as parameters. If no value is given for guidance , it returns "none" , I do it in this way but i am not sure it is the right way:

public SimplePiece(String piece,String d){
super(piece);
if(d == null){
guidance = "none";
}else{
guidance = d;
}
}

What do you sugger me to do to get the right code .

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Pass Parameter To JavaFX Pie Chart

Jul 25, 2014

I have this class and I want to pass "pergunta" from another class:

Java Code:

here* = if I put a number, the code works. I want to receive the parameter "pergunta" here but I can't put a parameter in start .

I want to populate the array pergunta in a previous class and use in this one.

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.chart.*;
import javafx.scene.Group;

[code]....

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Apr 12, 2014

I am not able to get the arraylist object on jsp. Below is my code.

public class DisplayArticle extends SimpleTagSupport
{
String path;
List<Article> articleList=new ArrayList<Article>();
public String getPath() {
return path;

[code]....

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Two Ways To Pass Arguments To Methods

Nov 14, 2014

I have a test that covers Objects & Classes, Importing Classes and Polymorphism. One of the essay questions will be: Explain two ways to pass arguments to methods and give examples. I was reading the book and found Pass by Value and Pass by Reference. Is this the two ways to pass arguments?

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Pass Parameter Between Try / Catch Block

Oct 14, 2014

Any way to pass parameter between try/catch block.

In other word:

I have a method:
 
public void invia(OiStorto invioaca) throws Exception {
         Long id=0L;
        try {
               //some code
     for (VElenpere elenpere : elenperes) {
                popolaScompiute(anno, inviaEOI0, param, opempiute, elenpere,id);

[Code] ....
   
And finally the method in which the error can occur (the method poputa is called for every id)
 
private void poputa(ElOpeIncType opereIncompiute, OpeIncType operaSingola, OiOpera opere) {
try {
//some code
} catch (NullPointerException e) {
            e.printStackTrace();
            //return id;
        }

So method invia call the method popolaScompiute, inside popolaScompiute there is an iteraction through some id and for some id can occur an error; what i want is the getting the value of id in the first method invia, using the block try/catch. Is there a way to accomplish this?

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