"method (...) not found in class (...)" problem

Question

I am having trouble with my GUI class not recognizing methods from a STACK class from the same package. Here's the skinny:
I have a GUI class named WordGUI.
I hava a STACK class named WordStack.
within WordGUI I instantiate an instance of a WordStack and call it myStack. Example below:
WordStack myStack = new WordStack();
When I call WordStack methods from WordGUI I get the error message even though display is a method from WordStack:
"WordGUI.java": Error #: 300 : method display(java.awt.Graphics, int) not found in class assign4.WordStack at line 34, column 13
Complete code for both classes is below:
WordGUI class:
package assign4;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class WordGUI extends Applet implements ActionListener{
WordStack myStack = new WordStack();
private Button testButton;
private TextField wordField;
public void init(){
//add(myStack);
wordField = new TextField(20);
add(wordField);
wordField.addActionListener(this);
testButton = new Button("Test for palindromes");
add(testButton);
testButton.addActionListener(this);
}//init()
public void paint (Graphics g){
g.drawString("Enter a word in the textField above and click", 25, 100);
g.drawString("the button to check if the word is a palindrome", 25, 115);
myStack.display(g, 150);
}//paint()
public void actionPerformed(ActionEvent event){
if(event.getSource() == testButton){
String userInput = wordField.getText();
myStack.evaluate(userInput);
repaint();
}//actionPerformed()
}//class WordGUI
WordStack class:
package assign4;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class WordStack implements Cloneable{
private char[] data;
private int manyItems;
public WordStack(){
final int initialCapacity = 20;
manyItems = 0;
data = new char[initialCapacity];
}//generic constructor
public WordStack(int initialCapacity){
if(initialCapacity < 0){
throw new IllegalArgumentException
("initialCapacity too small: " + initialCapacity);
manyItems = 0;
data = new char[initialCapacity];
}//constructor
public int getCapacity(){
return data.length;
}//getCapacity()
public boolean isEmpty(){
return (manyItems == 0);
}//isEmpty()
public char pop(){
if(manyItems == 0){
//throw new EmptyStackException();
return data[--manyItems];
}//pop()
public void push(char item){
if(manyItems == data.length){
ensureCapacity(manyItems * 2 + 1);
data[manyItems] = item;
manyItems++;
}//push()
public void ensureCapacity(int minimumCapacity){
char biggerArray[];
if(data.length < minimumCapacity){
biggerArray = new char[minimumCapacity];
System.arraycopy(data, 0, biggerArray, 0, manyItems);
data = biggerArray;
}//ensureCapacity()
public String evaluate(String userInput){
char charToProcess;
for(int charNum = 0; charNum < userInput.length(); charNum++){
push(userInput.charAt(charNum));
}//evaluate()
public void display(Graphics g, int yLoc){
for(int i = 0; i < data.length; i++){
g.drawString("" + data, 25, yLoc);
yLoc += 15;
}//display()
}//class WordStack
Any help would be appreciated greatly. Thank you

Answer 1

you need to make your graphics call against the GUI object