Methods Cannot Be Resolved To A Variable Or Is Not A Field
Feb 7, 2015
I've been using Eclipse and I realized that it compiles stuff into class files for you. So, I created a new project and each class is a separate .java file, with the .class files already there, but I cannot get rid of these errors. Or, say if I wrote them all into one file and then realized it needs to be 3 separate, or that all need to be in the same src file (oops)? Here are the errors:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
random cannot be resolved or is not a field
guessp1 cannot be resolved to a variable
guessp1 cannot be resolved to a variable
guessp2 cannot be resolved to a variable
guessp2 cannot be resolved to a variable
guessp3 cannot be resolved to a variable
guessp3 cannot be resolved to a variable
guessp1 cannot be resolved to a variable
guessp2 cannot be resolved to a variable
guessp3 cannot be resolved to a variable
[code]....
View Replies
ADVERTISEMENT
Sep 12, 2014
I was given the assignment to make script so that is will fill an array with random numbers using "recyclable" parts.
So my script is:
import java.util.*;
class eser_ha_dibrot_4 {
public static void main(String[] args) {
int []a=new int[10];
fill(a);
[Code] ....
And I get this error: "random cannot be resolved or is not a field"
what to do?
View Replies
View Related
Apr 30, 2014
In my application, some text should be added to a text area in response to a click on a button. So as an action listener to this class, I made another class which implements the ActionListener.
Inside this class, I have obtained the text which I want to be added to the text area. But the text area is in another class and for the action listener I wrote another class.
Now the problem is that when I try to add the text to the text area by the following line of code, it says that textArea_1 can not be resolved or is not a field.
Java Code:
ParentPanel.textArea_1.setText("Name:"+ncrarray[0]+"
Code:"+ncrarray[1]+"
Rank:"+ncrarray[2]); mh_sh_highlight_all('java'); What should I do about it?
Even if I try to write a method like the following in the class in which the text area is created, it gives the same error.
Java Code:
public void printTextArea(String text) {
textArea_1.setText(text);
} mh_sh_highlight_all('java');
The text area is present inside a constructor of the class. I am writing the method outside the constructor (ofcourse).
View Replies
View Related
Jan 18, 2015
Here is my current code. The CustomerName in the System.out.print statement doesn't compile - it says that CustomerName can not be resolved to a variable. But why is that true? it is declared and assigned a value in the for loop.
Query query = em.createQuery("select CustomerName from web_cost_file,customer " +
"where web_cost_file.customer=customer.id and web_cost_file.customer=" +
costsFileList[0]);
List<Object[]> listCustomerName = query.getResultList();
for (Object[] result : listCustomerName) {
String CustomerName = result[0].toString();
}
System.out.print(CustomerName);
View Replies
View Related
Jun 27, 2014
I am getting an error stating that 'word cannot be resolved to a variable' pointing to my return value. Why? Should I make a default String value for word before my while loop or something, like
String word = " ";
?
String getItRight(){//make sure the user enters the password correctly
Scanner input = new Scanner(System.in);
boolean repeating = true;
while(repeating){
[Code] ....
View Replies
View Related
Jun 18, 2014
The error "cannot resolve to a variable". I get the error I just can't seem to fix the error.Presently I am working my way through the Oracle docs and that seems ok. Java for Dummies, Sams teach Yourself Java in 21 Days, plus my favorite Head First Java.
package tutorial;
import java.util.*;
public class HolidaySked {
BitSet sked;
public HolidaySked(){
sked = new BitSet (365);
int [] holiday = {1,15,50,148,185,246,281,
316,326,359};
for (int i = 0; i<holiday.length; i++){
addHoliday(holiday[i]);
[code]....
View Replies
View Related
Sep 11, 2014
What I'm trying to do here is to count the vowels in an arraylist of strings. What I did may not be right, but that's not my problem for now. My problem is that i cannot return the value (n) I want to return. I don't know why.
import java.util.*;
import java.util.Arrays;
public class One {
public static void main(String[] args) {
ArrayList<String> list = new ArrayList<String>();
list.add("aaa");
list.add("brr");
list.add("unn");
System.out.println(vowels(list));
[URL] ....
View Replies
View Related
Mar 9, 2014
I have a project where I must sort a collection of songs by a number of fields: year, rank, title and artist. in the project, we must use certain methods and we cannot add others without getting marked down. Here are the specific requirements:
Sorting
The -sortBy option will cause the output to be sorted by a particular field. If this option is specified, the output should be ordered according to the field named. If there are ties, the tied songs should appear in same order in which they were in the input file. If no -sortBy option is specified, the output should maintain the order of the input file.
public void sortYear()
Order the songs in this collection by year (ascending).public void sortRank()
Order the songs in this collection by rank (ascending).public void sortArtist()
Order the songs in this collection lexicographically by artist (ascending, case-insensitive).public void sortTitle()
Order the songs in this collection lexicographically by title (ascending, case-insensitive).
Here is the relevant code:
SongCollection Class
Java Code: import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.*;
[code]....
View Replies
View Related
Sep 15, 2014
I'm not really sure I understand the functional difference between a static and final variable/field. Oracle defines Class Variable as:
Class Variables (Static Fields) A class variable is any field declared with the static modifier; this tells the compiler that there is exactly one copy of this variable in existence, regardless of how many times the class has been instantiated. A field defining the number of gears for a particular kind of bicycle could be marked as static since conceptually the same number of gears will apply to all instances. The code static int numGears = 6; would create such a static field. Additionally, the keyword final could be added to indicate that the number of gears will never change.
If static will have the same value regardless of how many times it's used, then why use final (or vice versa)?
View Replies
View Related
Apr 9, 2015
I'm trying to build a program that will output what will ultimately look like a simple mario level turned on its side. As part of my output I need the user to define what mario looks like. I do this using Scanner and save the input to String mario. When I try to use that variable in another method it gives me troubles.
import java.util.Scanner;
public class Mario2
{
public static void mario() {
//user defines mario
String mario = ">->O";
Scanner keys = new Scanner(System.in);
System.out.println("What does mario look like?");
mario = keys.next();
System.out.println("Mario now looks like: " + mario);
[code]....
View Replies
View Related
Feb 3, 2014
eg: "Sourdough".toUpperCase();
I guess this is actually a 2-part question:
- How does this work? (nothing seems to be passed through the parameter, so how is it that the value or variable is manipulated in this fashion?)
- How would I create a method that does something similar? (ie. adjusting a variable without having it passed through the parameters)
View Replies
View Related
Aug 27, 2014
I Can't run this simple program
import java.util.Scanner;
import javax.swing.JOptionpane;
public class Project {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
[code]...
This is the Error that i get in console!"Exception in thread "main" java.lang.Error: Unresolved compilation problem: JOptionPane cannot be resolved at Project.main(Project.java:10)"
View Replies
View Related
Jun 2, 2014
I am trying to read a file that will be contained within the Jar. I have created a source folder in eclipse and put the file in there. The examples I can find online to do this are not working out for me. I am getting an error that getClass cannot be resolved.
Java Code:
private static void help() {
version();
try {
InputStreamReader is = getClass.getClassLoader().getResourceAsStream("data/cmdhelp");
int c;
do {
c = is.read();
System.out.print((char) c);
} while (c > -1);
System.out.println();
} catch (IOException e) {
System.out.println("JAR file has not been packaged correctly.");
}
} mh_sh_highlight_all('java');
The error from eclipse:
getClass cannot be resolvedCommand.java/accface/src/frontendline 29Java Problem
View Replies
View Related
Mar 2, 2012
I found some code online to draw a pink heart.. sort of a valentine's day heart.. I would like to add to it and customize it some... But I can't get it to work as-is.. I get a compile error that "StdDraw Cannot be resolved" ...
Here is the code..
import java.awt.color.*;
import java.awt.Graphics;
import javax.swing.JPanel;
public class Heart {
public static void main(String[] args) {
StdDraw.setXscale(-1.5, +1.5);
[Code] .....
View Replies
View Related
Mar 27, 2014
I am trying to use a custom class in a .jsp page, as part of a course I am taking on Web Technologies.The original version of the jsp page was working fine, until I moved part of the Java code to a separate class.Here is the original .jsp code that is working:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-GB" xml:lang="en-GB">
<%@page pageEncoding="utf-8" %>
<head>
<meta charset="UTF-8" />
<title>Forum</title>
<link rel="stylesheet" type="text/css" href="stocktails.css" />
</head>
<body>
[code]....
View Replies
View Related
Mar 9, 2014
I'm not sure why I'm getting these errors. They only begin to happen after the second if statement, and the subsequent if statements are formatted exactly the same.
The errors are marked by the comments in the code.
Java Code:
import java.util.*;
import java.io.*;
public class GazillionSongs {
public static void main(String[] args) throws FileNotFoundException {
System.out.println("Welcome to Java Song Collection!");
System.out
.println("This program sorts and filters large databases of popular songs.");
[Code] .....
View Replies
View Related
Aug 11, 2008
Now I am working with tomcat6.0.16 and oracle10g.
<%@page import="java.sql.*" %>
<%
//Register the drivers
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
//Establish connection with the database
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","manager");
[Code] ....
This is my program...then I am getting following error.
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
[Code] ....
View Replies
View Related
Apr 11, 2014
I've created a constructor in bean and put an value to my string after doing so all started to work properly. I am trying to get my application to work but no luck so far. I have looked for similar issues but although there were similar I've got no luck in fixing mine.
When I am trying to put an value in the input file i got error message (/zadanie_1.xhtml @15,75 value="#{z_1.lancuch}": Target Unreachable, identifier 'z_1' resolved to null).
My starting page:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html">
[Code]......
View Replies
View Related
May 5, 2014
I am getting the error message as Exception in thread "main" java.lang.Error: Unresolved compilation problems: NewExcel cannot be resolved to a type for the line NewExcel test = new NewExcel(); in the below code to read the columns from an excelsheet "test.xls". Why I am getting the error message :-
import java.io.File;
import java.io.IOException;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
public class ReadExcel
[Code] .....
View Replies
View Related
Jan 7, 2015
I am trying to implement the JSF 2.0 project with Primefaces from one of the tutorial, i con login with only jsf but not when i use primeface where i am getting following error.
Error Log
HTTP Status 500 - /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null type Exception report
message /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null
javax.faces.webapp.FacesServlet.service(FacesServlet.java:321)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)root cause
[Code] ....
Note The full stack trace of the root cause is available in the Apache Tomcat/7.0.57 logs. in Apache Tomcat/7.0.57
Employee.java
package com.login.sample;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.annotation.PostConstruct;
[Code] ....
I am trying to create a login page with a database in which i am getting this error. I am not getting this bean properties.
View Replies
View Related
Jun 17, 2014
I use SceneBuilder2.0 with JavaFX8 on OSX 10.9.4
When i use a stylesheet in SceneBuilder2.0 which uses a color-lookup the lookup fails with:
WARNING: Could not resolve 'abc' while resolving lookups for '-fx-background-color' from rule '*.button' in stylesheet supersimple.css
The color-definition is in the root-rule, so it should be found.
The lookup does work fine at Runtime.
There is a more complete description of the problem on stackoverflow:
javafx - SceneBuilder2.0 does apply rules with color-lookup - Stack Overflow
View Replies
View Related
May 21, 2014
Given the case I have an object which is assigned only once. What is the difference in doing:
public class MyClass {
private MyObj obj = new MyObj("Hello world");
private MyClass(){}
//...
}
and
public class MyClass {
private MyObj obj;
private MyClass(){
obj = new MyObj("Hello world");
}
//...
}
Is there a difference in performance or usability? (Given also the case there are no static calls expected) ....
View Replies
View Related
Oct 27, 2014
The term "Local variable" is related to scope. That is a local variable is one which is defined in a certain block of code, and its scope is confined inside that block of code.And a "Member variable" is simple an instance variable.
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?
View Replies
View Related
Jan 11, 2015
Given a reference variable : Car c1 = new Car();
when we create another variable and set it equal to the first : Car c2 = c1;
we're pointing c2 at the same car object that c1 points to (as opposed to pointing c2 at c1, which in turn points at the car). So if we have code like,
Car c1 = new Car();
Car[] cA = {c1, c1, c1, c1};
are we doing the same? Are we creating four *new* reference variables, each of which points at the same car (again as opposed to pointing them at c1 itself)? I think so, but want to make sure I'm understanding this correctly.
View Replies
View Related
May 23, 2014
I have a JFrame jf and JPanel jp on it. jp has five TextFields named cel1, cel2.. cel5. I wish to construct a String Cel + for loop index and run a for loop to reset the values of all the text fields using a single statement such as cel1.SetText("abc"). Similar things can be done in foxfro. How does one do it in java?
View Replies
View Related
Mar 28, 2014
I've come across a piece of code and I am totally baffled by how a certain field is being incremented.
public class Foo{
private static int counter;
private final int id = counter++;
public int id(){return id;}
[Code] ....
Now. The output for this is:
0
1
2
3
4
I understand all the code in it quite well. It's all basic. Containers, generics, looping, foreach loop. What I DON'T understand though is how on each iteration of the foreach loop, the call to the method id() returns an incremented number. I am assuming it has something to do with the field "counter" in class Foo being static because when I made it non-static it didn't increment. I must have missed something way back when I started learning Java because I just don't get it.
The id() method only returns the value of the id field in class Foo and that is the value of counter++. counter is not initialized, though I'm guessing it gets the default 0 when the Foo() constructor is run? Or do statics get initialized BEFORE the constructor is even run? Anyway. How does calling the id() method cause an incrementation? I'd understand if there was some code that tracked the number of Foo objects being created and incrementing for each one, but I cannot see how each time the id() method is called it returns an incremented value.
View Replies
View Related
