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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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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JSP :: Pass Parameter From Jstl To Expression Tag

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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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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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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Simple Recursion Method - Accept Integer Parameter N And Return Sum Of First N Reciprocals

Nov 1, 2014

I am practicing some basic recursion and I was trying to solve this problem

Write a method sumTo that accepts an integer parameter n and returns the sum of the first n reciprocals. In other words:

sumTo(n) returns: 1 + 1/2 + 1/3 + 1/4 + ... + 1/n

For example, the call of sumTo(2) should return 1.5. The method should return 0.0 if passed the value 0 and should throw an IllegalArgumentException if passed a value less than 0.

This is my attempt to do it , however my output is always a 0.0 , and i do not understand why :

public static double sumTo(int n ){
if(n<0){
throw new IllegalArgumentException();
}
else if (n==0){
return 0.0;

[Code] .....

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Accept List Of Integers As Parameter And Return Number Of Times Most Frequently Occurring Integer

Nov 20, 2014

Write a method maxOccurrences that accepts a list of integers as a parameter and returns the number of times the most frequently occurring integer (the “mode”) occurs in the list. Solve this problem using a map as auxiliary storage.

If the list is empty, return 0.

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Method Must Return Int Type - If Given Integer Is Strong Return A / If Not Return B

Sep 7, 2014

I want to use a method, which takes for example an int and also returns an integer. For example, if the the given integer is strong return a, if it is notstrong return b. How would you write that in a Code?

I want to use that in a more general way. I want to give a method mlong the value X of the type date and let it return an int. Type date consists of 3 int, one of them is the int month.

mlong should return an int depending on the X.moth. at the moment my code looks like this:

// File1:
public class date {
public int day;
public int month;
public int year;
}

// File 2:
public class monthlength {
public int mlong(date X) {
int t;
t = X.month;
if (t == 1 || t == 3 || t == 5 || t == 7 || t == 8 || t == 10 || t == 12)
{ return 31; }
if(t == 4 || t == 6 || t == 9 || t == 11)
{return 30;}
}
}

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How To Return Values In Object Return Type Function (method)

Apr 2, 2014

How do i take input values for TwoDPoint (which are objects) and return it back in numerical values also print them.

When i create an object in main method and pass values to my function of return type TwoDPoint,it gives error:- found int,int need TwoDPoiint,TwoDPoint.

// Here is what i tried to do:

Created class TwoDPoint that contains two fields x, y which are of type int. Defined another class TestTwoDPoint, where a main method is defined.In the main method created two TwoDPoint objects.

Then I modified the class TestTwoDPoint and add another function to it. This function takes two TwoDPoints as input and returns the TwoDPoint that is farthest from the point (0,0).

Then I added another function to TestTwoDPoint. This function takes two TwoDPoints as input and returns a new TwoDPoint whose x value is the sum of x values of the input TwoDPoint's and whose y value is the sum of the y values of the input TwoDPoint's.

class TwoDPoint {
int x = 2;
int y = 4;
}
class TestTwoDPoint {
public static void main(String args[]) {
TwoDPoint obj1 = new TwoDPoint();
System.out.println(obj1.x);
System.out.println(obj1.y);

[Code] ....

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Non-Parameter Constructor Calls Two Parameter Constructor

Apr 19, 2014

I was practicing my java skills and came across an exercise in which a non parameter constructor calls a two parameter constructor. I tried a few searches online but they all came back unsuccessful. This is the part I am working on:

public PairOfDice(int val1, int val2) {
// Constructor. Creates a pair of dice that
// are initially showing the values val1 and val2.
die1 = val1; // Assign specified values
die2 = val2; // to the instance variables.
}
public PairOfDice() {
// Constructor that calls two parameter constructor
}

I tried calling the two constructor using the line "this(val1, val2)" but I get an error because val1 and val2 are local variables.

Then I tried to use the same signature: "this(int val1, int val2)" but that didn't work either.

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If Given Integer Is Even Return 1 / If Not Even Return 0

Sep 7, 2014

I want to use a method, which takes for example an int and also returns an integer. For example, if the the given integer is even return 1, if it is not even return 0. How would you write that in a Code?

I want to use that in a more general way. I want to give a method mlong the value X of the type date and let it return an int. Type date consists of 3 int, one of them is the int month.

mlong should return an int depending on the X.moth.

At the moment my code looks like this:

// File1:

public class date {
public int day;
public int month;
public int year;
}

// File 2:

public class monthlength {
public int mlong(date X) {
int t;
t = X.month;
if (t == 1 || t == 3 || t == 5 || t == 7 || t == 8 || t == 10 || t == 12)
{ return 31; }
if(t == 4 || t == 6 || t == 9 || t == 11)
{return 30;}
}
}

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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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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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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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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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JSP :: Getting Parameter Dynamically?

Mar 30, 2014

I'm displaying a 3-column table with the column names ID, name, and salary. I made the ID into a link to go to the EditServlet class. What I'm trying to do is figure out which ID# was clicked to get onto the servlet page, how to implement that dynamically?

I know that if you put something like ?x=1 and then getParameter("x") on the servlet page would work, but then all the IDs would have the same parameters since I'm using a for loop to print out my ArrayList of objects.

My code for the jsp part is below.

for (int count=0; count<list.size(); count++) {
%>
<tr>
<td> <a href="EditServlet"><%= list.get(count).id %></a>
<td> <%= list.get(count).name %>

[Code] ....

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Passing A Map As Parameter

Apr 30, 2014

I'm using Java in BlueJ where I'm trying to write a class to store cycling club membership details in a map. I'm trying to pass a map as a parameter to a function that will iterate over the map and print out the member details. My code is:

public class CtcMembers
{
//instance variables
private Map<String, Set<String>> memberMap;
/**
* Constructor for objects of class CtcMembers

[Code] ....

When I execute the following in the OU workspace:

CtcMembers c = new CtcMembers();
c.addCyclists();

I can see a map populated with the expected details.

When I execute the following in the OU workspace:

c.printMap(c.getMap());

I get the following error:

java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.String
in CtcMembers.printMap(CtcMembers.java:81)
in (OUWorkspace:1)

I wasn't aware I was trying to cast anything so this has got me baffled.

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Using Enumeration As Parameter?

May 18, 2014

I am trying to create a method called getVariable will has a parameter of a variable that has a type of Test, an enumeration. An int variable called x is assigned a value of 5, and through control statements, I want its value to change depending on what the argument is. I was able to correctly create this method, but when I use it I get an error saying, "non static method getVariable(Test) cannot be referenced from a static context" on line 28.

Here is the code:

package javaapplication5;
public class Product implements Cloneable
{

[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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