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Q&A Java cannot find class within same package

I've written a class object, QueueObject, but when I try to construct it inside of my main class, it says it cannot find the symbol on compilation. I've read lots of pages saying how misspellings o...

1 answer  ·  posted 2y ago by cuzzo‭  ·  last activity 2y ago by cuzzo‭

Question java class
#2: Post edited by user avatar cuzzo‭ · 2022-03-24T20:11:44Z (over 2 years ago)
  • I've written a class object, `QueueObject`, but when I try to construct it inside of my main class, it says it cannot find the symbol on compilation. I've read lots of pages saying how misspellings or import failures could cause it but both files are in the same package and I double checked spelling although I think Eclipse would tell me if I spelled `QueueObject` wrong.
  • QueueObject.java
  • package disksim;
  • public class QueueObject {
  • //The total time the object has been inside the queue for
  • private double time;
  • //The objects position, 0 >= x <= 1023
  • private int id;
  • public QueueObject(int id) {
  • this.time = 0.0;
  • this.id = id;
  • }
  • public int getId() {
  • return id;
  • }
  • public double getTime() {
  • return time;
  • }
  • public void setTime(double time) {
  • this.time = time;
  • }
  • public void addTime(double time) {
  • this.time += time;
  • }
  • }
  • MainClass.java
  • public class MainClass {
  • private static String algore;
  • private static int Qsize;
  • private static String filePath;
  • private static ArrayList<QueueObject> queue = new
  • ArrayList<QueueObject>(Qsize);
  • public static void doFIFO() {
  • File data = new File(filePath);
  • try {
  • Scanner in = new Scanner(data);
  • while (in.hasNextLine()) {
  • if (queue.size() != Qsize) {
  • queue.add(new QueueObject(Integer.parseInt(in.nextLine())));
  • }
  • }
  • System.out.println(queue.toString());
  • in.close();
  • } catch (FileNotFoundException e) {
  • // TODO Auto-generated catch block
  • e.printStackTrace();
  • }
  • }
  • Compilation Errors
  • ![Command Line Compilation Error](https://software.codidact.com/uploads/PZawp17L2h6sPwoo9B8paneq)
  • I've written a class object, `QueueObject`, but when I try to construct it inside of my main class, it says it cannot find the symbol on compilation. I've read lots of pages saying how misspellings or import failures could cause it but both files are in the same package and I double checked spelling although I think Eclipse would tell me if I spelled `QueueObject` wrong.
  • QueueObject.java
  • package disksim;
  • public class QueueObject {
  • //The total time the object has been inside the queue for
  • private double time;
  • //The objects position, 0 >= x <= 1023
  • private int id;
  • public QueueObject(int id) {
  • this.time = 0.0;
  • this.id = id;
  • }
  • public int getId() {
  • return id;
  • }
  • public double getTime() {
  • return time;
  • }
  • public void setTime(double time) {
  • this.time = time;
  • }
  • public void addTime(double time) {
  • this.time += time;
  • }
  • }
  • MainClass.java
  • package disksim;
  • public class MainClass {
  • private static String algore;
  • private static int Qsize;
  • private static String filePath;
  • private static ArrayList<QueueObject> queue = new
  • ArrayList<QueueObject>(Qsize);
  • public static void doFIFO() {
  • File data = new File(filePath);
  • try {
  • Scanner in = new Scanner(data);
  • while (in.hasNextLine()) {
  • if (queue.size() != Qsize) {
  • queue.add(new QueueObject(Integer.parseInt(in.nextLine())));
  • }
  • }
  • System.out.println(queue.toString());
  • in.close();
  • } catch (FileNotFoundException e) {
  • // TODO Auto-generated catch block
  • e.printStackTrace();
  • }
  • }
  • Compilation Errors
  • ![Command Line Compilation Error](https://software.codidact.com/uploads/PZawp17L2h6sPwoo9B8paneq)
#1: Initial revision by user avatar cuzzo‭ · 2022-03-24T20:09:10Z (over 2 years ago)
Java cannot find class within same package
I've written a class object, `QueueObject`, but when I try to construct it inside of my main class, it says it cannot find the symbol on compilation. I've read lots of pages saying how misspellings or import failures could cause it but both files are in the same package and I double checked spelling although I think Eclipse would tell me if I spelled `QueueObject` wrong.

QueueObject.java
    package disksim;

    public class QueueObject { 
	//The total time the object has been inside the queue for
	private double time;
	
	//The objects position, 0 >= x <= 1023
	private int id;
	
	public QueueObject(int id) {
		this.time = 0.0;
		this.id = id;
	}
	
	public int getId() {
		return id;
	}
	
	public double getTime() {
		return time;
	}
	
	public void setTime(double time) {
		this.time = time;
	}
	
	public void addTime(double time) {
		this.time += time;
	}
    }

MainClass.java

    public class MainClass {

	private static String algore;
	private static int Qsize;
	private static String filePath;
	private static ArrayList<QueueObject> queue = new 
        ArrayList<QueueObject>(Qsize);

	public static void doFIFO() {
		File data = new File(filePath);	
	
		try {
			Scanner in = new Scanner(data);
			
			while (in.hasNextLine()) {
				if (queue.size() != Qsize) {
					queue.add(new QueueObject(Integer.parseInt(in.nextLine())));
				}
			}
			System.out.println(queue.toString());
			in.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	
	}

Compilation Errors

![Command Line Compilation Error](https://software.codidact.com/uploads/PZawp17L2h6sPwoo9B8paneq)