Java - 错误找不到符号

Question

我不明白为什么我得到＆＃34;错误找不到符号＆＃34;在几个地方。有人可以就这个简单的问题说清楚。

• PriceCalculator.java:18：错误：找不到符号---私有JTextFeild priceFeild1;
• PriceCalculator.java:19：错误：找不到符号---私有JTextFeild priceFeild2;
• PriceCalculator.java:41：错误：找不到符号--- setDefaultCloseOpperation（JFrame.EXIT_ON_CLOSE）;

• PriceCalculator.java:44：错误：找不到符号--- 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

这是因为你拼错了（JTextFeild）。它应该是JTextField。

另外，setDefaultCloseOperation代替setDefaultCloseOpperation

Answer 2

你的拼写错误：

JTextFeild代替JTextField

和setDefaultCloseOpperation(JFrame.EXIT_ON_CLOSE); 而不是setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);您在p中使用了2 Operation。