Java - 錯誤找不到符號

Question

我不明白爲什麼我在幾個地方得到「錯誤找不到符號」。有人可以請解釋一下這個簡單的問題。

• PriceCalculator.java:18：error：can not find symbol --- private JTextFeild priceFeild1;
• PriceCalculator.java:19：error：can not find symbol --- private JTextFeild priceFeild2;
• PriceCalculator.java:41：error：can not find symbol --- setDefaultCloseOpperation（JFrame.EXIT_ON_CLOSE）;

• PriceCalculator.java:44：error：can not find symbol --- buildPanel（）;

  import javax.swing.*; 
  public class PriceCalculator extends JFrame 
  { 
  private JPanel panel;        // References the panel 
  
  private JLabel messageLabel1;      // References the whole sale label 
  private JLabel messageLabel2;      // References the markup label percentage 
  
  private JTextFeild priceFeild1;     // References the whole sale price 
  private JTextFeild priceFeild2;     // Referencts the markup label percentage 
  
  private JButton calcButton;      // References the calculator button 
  
  private final int WINDOW_WIDTH = 550;   // References the window width 
  private final int WINDOW_HEIGHT = 550;   // Referenecs the window height 
  
  /** 
  
  Constructor below 
  
  */ 
  
  public PriceCalculator() 
  { 
  // Set the window title 
  setTitle("Retail Price Calculator"); 
  
  // Set the size of the window 
  setSize(WINDOW_WIDTH, WINDOW_HEIGHT); 
  
  // Set the [x] exit button to close the program for the user 
  setDefaultCloseOpperation(JFrame.EXIT_ON_CLOSE); 
  
  // Build the panel and add it to the JFrame 
  buildPanel(); 
  
  // Add the contents to the panels frame 
  add(panel); 
  
  // Display the window here 
  setVisible(true); 
  } 
  
  
  
  
  /** 
  
  Main Method Below 
  
  */ 
  
  public static void main(String[] args) 
  { 
  new PriceCalculator(); 
  } 
  
  } 
  

Answer 1

這是因爲你拼寫錯了（JTextFeild）。它應該是JTextField。

此外，setDefaultCloseOperation代替setDefaultCloseOpperation

Answer 2

你的拼寫錯誤：

JTextFeild，而不是JTextField

和setDefaultCloseOpperation(JFrame.EXIT_ON_CLOSE); 而不是setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);您在使用。