java - （乌龟的）类型未定义

Question

嗨，我正在为我的班级做作业，但在最后一部分遇到了一些麻烦。这部分我正在编写代码来绘制一些阶段并放入一个具有图片背景和一些自定义功能的世界。阶段的代码是我认为的问题。你们可以检查并帮助我吗？

import java.awt.Color;

public class FaceCaptions
{
  public static void main(String [] args)
  {

    String filename;
    if (args.length > 0) {
// got a filename passed into program as a runtime parameter
      filename = args[0];
      System.out.println("Filename passed in: " + filename);
    } else {
// ask user for a picture
      filename = FileChooser.pickAFile();
      System.out.println("User picked file: " + filename);
    }
// use the filename to create the picture object
    Picture pic = new Picture(filename);
    pic.show();
    Turtle tim = new Turtle(424,906,pic);
    tim.setPenColor(Color.red);
    tim.setPenWidth(6);
    tim.penDown();
    tim.moveTo(440,1046);
    tim.moveTo(522,1133);
    tim.moveTo(597,1133);
    tim.moveTo(671,1063);
    tim.moveTo(688,1009);
    tim.moveTo(698,882);
    tim.moveTo(657,790);
    tim.moveTo(495,771);
    tim.moveTo(424,906);

// draw the features
    tim.moveTo(450, 910);
    tim.drawEyeglasses(450, 910, 5, Color.white);
    tim.moveTo(505, 1020);
    tim.drawMustache(505,1020, 2, Color.black);


//Create Phase 1
    tim.moveTo(400,1300);
    tim.turnLeft();
    tim.drawPhase1();


//Create Phase 2
    tim.moveTo(300,1450);
    tim.drawPhase2();

  }
      public static void drawPhase1()
    {
      TurtleAlphabet.drawABoldSize(tim, Color.blue, true, 1);
      TurtleAlphabet.drawWBoldSize(tim, Color.white, true, 1);
      TurtleAlphabet.drawKBoldSize(tim, Color.red, true, 1);
      TurtleAlphabet.drawWBoldSize(tim, Color.blue, true, 1);
      TurtleAlphabet.drawABoldSize(tim, Color.white, true, 1);
      TurtleAlphabet.drawRBoldSize(tim, Color.red, true, 1);
      TurtleAlphabet.drawDBoldSize(tim, Color.blue, true, 1);
    }


    public static void drawPhase2()
    {
      TurtleAlphabet.drawABoldSize(tim, Color.yellow, true, 1);
      TurtleAlphabet.drawWBoldSize(tim, Color.orange, true, 1);
      TurtleAlphabet.drawABoldSize(tim, Color.yellow, true, 1);
      TurtleAlphabet.drawRBoldSize(tim, Color.orange, true, 1);
      TurtleAlphabet.drawDBoldSize(tim, Color.yellow, true, 1);
    }
}

这是系统的响应：

File: C:\Users\nhock\Desktop\School Work\UNCC Fall 2018\1212\ITIS_1212\bookClasses\FaceCaptions.java  [line: 45]
Error: The method drawPhase1() is undefined for the type Turtle
File: C:\Users\nhock\Desktop\School Work\UNCC Fall 2018\1212\ITIS_1212\bookClasses\FaceCaptions.java  [line: 50]
Error: The method drawPhase2() is undefined for the type Turtle
File: C:\Users\nhock\Desktop\School Work\UNCC Fall 2018\1212\ITIS_1212\bookClasses\FaceCaptions.java  [line: 55]
Error: Turtle cannot be resolved to a variable
File: C:\Users\nhock\Desktop\School Work\UNCC Fall 2018\1212\ITIS_1212\bookClasses\FaceCaptions.java  [line: 56]
Error: tim cannot be resolved to a variable
File: C:\Users\nhock\Desktop\School Work\UNCC Fall 2018\1212\ITIS_1212\bookClasses\FaceCaptions.java  [line: 57]
Error: tim cannot be resolved to a variable
etc..

标签： javadrjava

Answer 1

tim.drawPhase1()并tim.drawPhase2()调用Turtle类中的方法或intertited方法，似乎这些方法是在类Turtle上定义的，修改代码以静态使用drawPhase1,2方法并传递Turtle实例

FaceCaptions.drawPhase1(tim);

FaceCaptions.drawPhase2(tim);


public static void drawPhase1(Turtle tim){
    TurtleAlphabet.drawABoldSize(tim, Color.blue, true, 1);
    TurtleAlphabet.drawWBoldSize(tim, Color.white, true, 1);
    TurtleAlphabet.drawKBoldSize(tim, Color.red, true, 1);
    TurtleAlphabet.drawWBoldSize(tim, Color.blue, true, 1);
    TurtleAlphabet.drawABoldSize(tim, Color.white, true, 1);
    TurtleAlphabet.drawRBoldSize(tim, Color.red, true, 1);
    TurtleAlphabet.drawDBoldSize(tim, Color.blue, true, 1);
}

public static void drawPhase2(Turtle tim){
    TurtleAlphabet.drawABoldSize(tim, Color.yellow, true, 1);
    TurtleAlphabet.drawWBoldSize(tim, Color.orange, true, 1);
    TurtleAlphabet.drawABoldSize(tim, Color.yellow, true, 1);
    TurtleAlphabet.drawRBoldSize(tim, Color.orange, true, 1);
    TurtleAlphabet.drawDBoldSize(tim, Color.yellow, true, 1);
}